81. Finding Faults Earthquakeproducing faults, like the one the team is cruising over off Oceanside, California, and volcanoes are the most concentrated expressions of global http://sio.ucsd.edu/explorations/faults/

A Seismic Jigsaw Puzzle Takes Shape San Diego At Risk Hi-Ho Hi-Ho It's Off To Sea We Go The L-Cheapo World Tour A Seismic Jigsaw Puzzle Takes Shape Jeff Babcock should have heard his future calling him back in grade school. When the teacher told the class it was free drawing time, he was the kid sketching volcanoes. Robert Gordon Sproul as Babcock maps in detail an offshore earthquake fault system. He uses an innovative seismometer developed by his team at Scripps. On this October day, Babcock, fellow geophysicists Graham Kent and Alistair Harding, and graduate students Renee Bulow and Jeff Dingler are retrieving eight of the instruments from the ocean floor. Scientists have tended to stop at such boundaries, but the unknown fault might harbor even more destructive power than realized. Just as the IGPP team, which includes institute Director John Orcutt, was getting funding to build the seismographs, other scientists suggested that the Oceanside Fault could produce quakes with magnitudes exceeding 7.0 on the Richter scale, the same size as temblors that damaged San Francisco in 1989 and Northridge, California, in 1994.

82. California Geological Survey - Alquist-Priolo Earthquake Fault Zones US DEPARTMENT OF THE INTERIOR US GEOLOGICAL SURVEY OPENFILE REPORT 96-706. APPENDIX A. CALIFORNIA FAULT PARAMETERS. COMMENTS. A faults. SAN ANDREAS FAULT ZONE. http://www.consrv.ca.gov/CGS/rghm/psha/ofr9608/a_faults.htm

CALIFORNIA DEPARTMENT OF CONSERVATION DIVISION OF MINES AND GEOLOGY OPEN-FILE REPORT 96-08 U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 96-706 APPENDIX A CALIFORNIA FAULT PARAMETERS FAULT NAME AND GEOMETRY (ss) strike slip, (r) reverse, (n) normal (rl) rt. lateral, (ll) left lateral, (o) oblique LENGTH (km) SLIP RATE (mm/yr) RANK Mmax CHAR. RATE (events/yr) R.I. Down dip Width (km)(4) ruptop rupbot rake dip daz Endpt N Endpt S COMMENTS A FAULTS SAN ANDREAS FAULT ZONE San Andreas - Coachella (rl-ss) P n/a Slip rate based on Sieh and Williams (1990); Sieh (1986); Keller et al. (1982); Bronkowski (1981). Model assumes slip only in S. San Andreas events. San Andreas - San Bernardino (rl-ss) M Slip rate reported by Weldon and Sieh (1985).

83. Volcanic And Geologic Terms Echelon Set of geologic features that are in an overlapping or a staggered arrangement (eg, faults). Each is relatively short, but http://volcano.und.nodak.edu/vwdocs/glossary.html

Volcanic and Geologic Terms 'A'a: Hawaiian word used to describe a lava flow whose surface is broken into rough angular fragments. Click here to view a photo of 'a'a Accessory: A mineral whose presence in a rock is not essential to the proper classification of the rock. Accidental: Pyroclastic rocks that are formed from fragments of non-volcanic rocks or from volcanic rocks not related to the erupting volcano. Accretionary Lava Ball: A rounded mass, ranging in diameter from a few centimeters to several meters, [carried] on the surface of a lava flow (e.g., 'a'a) or on cinder-cone slopes [and formed] by the molding of viscous lava around a core of already solidified lava. Acid: A descriptive term applied to igneous rocks with more than 60% silica (SiO2). Active Volcano: A volcano that is erupting. Also, a volcano that is not presently erupting, but that has erupted within historical time and is considered likely to do so in the future. Agglutinate: A pyroclastic deposit consisting of an accumulation of originally plastic ejecta and formed by the coherence of the fragments upon solidification. Alkalic: Rocks which contain above average amounts of sodium and/or potassium for the group of rocks for which it belongs. For example, the basalts of the capping stage of Hawaiian volcanoes are alkalic. They contain more sodium and/or potassium than the shield-building basalts that make the bulk of the volcano.

84. Bodega Head Geology The geology of Bodega Head The Salinian Terrane west of the San Andreas Fault (with clickable slide show). by Terry Wright, copyright, 1996. http://www.sonoma.edu/geology/wright/Bhead.html

The Geology of Bodega Head: The Salinian Terrane west of the San Andreas Fault (with clickable slide show) Bodega Bay is a natural harbor resulting from movement along the San Andreas Fault. The eastern shore is straight and parallel to the edge of a wide zone of faulting that extends across the bay to the hills on Bodega Head. During the 1906 earthquake, 15' of movement displaced the harbor to the north relative to the mainland. Downward movement of the fault zone and erosion of rocks shattered by faulting gave us the depression of the bay. A sand spit closes the bay to the south at Doran Beach and a wide reach of sand dunes forms a northern barrier along Salmon Creek Beach. The rock contrast across the fault is profound. We see oceanic rocks of the Franciscan Complex Complex to the east and continental granites exposed on Bodega Head, a fragment of southern California or perhaps Baja California dragged north along the fault. If we try to match rocks from Bodega Head to rocks east of the fault, we have to go at least to the Tehachapi Mountains, 500 Km to the south to find similar granites. Some people feel the match is best in Baja California, several thousand Km to the south. Besides the many attractions of good food and tourism, natural attractions abound. The Bodega Marine Lab, run by the University of California has tours friday afternoons and many ongoing research programs on marine biology. The beaches and landscape surrounding the bay are a natural lab for geology and biology.

85. MSN Encarta - Fault (geology) Fault (geology). I. Introduction. Fault (geology), crack in the crust of the earth along which there has been movement of the rocks on either side of the crack. http://encarta.msn.com/encyclopedia_761563869/Fault_(geology).html

MSN Home My MSN Hotmail Shopping ... Money Web Search: logoImg('http://sc.msn.com'); Encarta Subscriber Sign In Help Home ... Upgrade to Encarta Premium Search Encarta Subscription Article MSN Encarta Premium: Get this article, plus 60,000 other articles, an interactive atlas, dictionaries, thesaurus, articles from 100 leading magazines, homework tools, daily math help and more for $4.95/month or $29.95/year (plus applicable taxes.) Learn more. This article is exclusively available for MSN Encarta Premium Subscribers. Already a subscriber? Sign in above. Fault (geology) I. Introduction Fault (geology) , crack in the crust of the earth along which there has been movement of the rocks on either side of the crack. A crack without movement... II. How Faults Are Created III. Terminology and Classification IV. Earthquakes and Faults V. Landforms Associated with Faults VI. Effects on Rocks Related Items Plate Tectonics Seismology 43 items Multimedia 3 items Selected Web Links California has its Faults … Life Along the Faultline: Life and Science in Earthquake Country 2 items Further Reading These sources provide additional information about: Fault (geology) Want more Encarta?

86. Richard Schultz's Home Page (faults Geological Engineering Rock Mechanics Fractu Richard A. Schultz Associate Professor of Geological Engineering Laxalt Mineral Engineering, Room 405. GeomechanicsRock Fracture http://equinox.unr.edu/homepage/schultz/

Richard A. Schultz Associate Professor of Geological Engineering Laxalt Mineral Engineering, Room 405 Geomechanics-Rock Fracture Group Geological Engineering Program, Department of Geological Sciences/172 Mackay School of Mines , University of Nevada, Reno, NV 89557-0138 email: schultz@mines.unr.edu phone: (775) 784-4318; fax: (775) 784-1833 WE HAVE MOVED! PLEASE UPDATE YOUR LINK TO www.mines.unr.edu/geo-eng/schultz Go to the Geomechanics homepage. Thanks for visiting my WebSite!

87. Terms And Definitions Cretaceous period A geological term denoting the interval of Earth history beginning around depressed crustal unit or block that is bounded by faults on its http://www.solarviews.com/eng/terms.htm

Terms and Definitions Index: A B C D ... Z A accretion Accumulation of dust and gas into larger bodies. albedo Reflectivity of an object; ratio of reflected light to incident light. albedo feature A dark or light marking on the surface of an object that might not be a geological or topographical feature. allocthonous (1) Material that is formed or introduced from somewhere other than the place it is presently found. (2) Fragmented rock thrown out of the crater during its formation that either falls back to partly fill the crater or blankets its outer flanks after the impact event. Alpha Centauri The closest bright star to our solar system. angstrom A unit of length = 1.0E-08cm. antipodal point The point that is directly on the opposite side of the planet; e.g., the Earth's north pole is antipodal to its south pole. aphelion The point in its orbit where a planet is farthest from the Sun. apoapsis The point in orbit farthest from the planet. apogee The point in orbit farthest from the Earth. ash The fine-grained material produced by a pyroclastic eruption. An ash particle is defined to have a diameter of less than 2 millimeters.

88. AllRefer Encyclopedia - Fault (Geology And Oceanography) - Encyclopedia AllRefer.com reference and encyclopedia resource provides complete information on fault, geology And Oceanography. fault, geology And Oceanography. http://reference.allrefer.com/encyclopedia/F/fault.html

AllRefer Channels :: Health Yellow Pages Reference Weather SEARCH : in Reference June 08, 2004 You are here : AllRefer.com Reference Encyclopedia Geology And Oceanography ... fault By Alphabet : Encyclopedia A-Z F fault, Geology And Oceanography Related Category: Geology And Oceanography fault, in geology, fracture in the earth's crust in which the rock on one side of the fracture has measurable movement in relation to the rock on the other side. Faults on other planets and satellites of the solar system also have been recognized. Evidence of faults are found either at the surface (fault surface) or underground (fault plane). Faults are most evident in outcrops of sedimentary formations where they conspicuously offset previously continuous strata. Movement along a fault plane may be vertical, horizontal, or oblique in direction, or it may consist in the rotation of one or both of the fault blocks, with most movements associated with mountain building and plate tectonics . The two classes of faults include the dip-slip (up and down movement), which is further divided into normal and thrust (reverse) faults; and strike-slip (movement parallel to the fault plane). The San Andreas fault earthquake . The largest earthquakes occur along thrust faults. Some faults creep from a half inch to as much as 4 in. (1 to 10 cm) per year. Fault movements are measured using laser and other devices. Faults create interpretation problems for geologists by altering the relations of strata (see stratification ), such as making the same rock layer offset in two vertical cross sections of a formation or making layers disappear altogether. Faults are often seen on the surface as topographical features, including offset streams, linear lakes, and fault scarps.

89. Denali Fault Earthquake Denali Fault Earthquake M7.9 November 3, 2002. Shown in yellow are other faults that show evidence of activity during Quaternary time (past two million years). http://wwwdggs.dnr.state.ak.us/earthquake.html

SITE MENU DGGS Home Sections Geologic Communications Energy Engineering Geology Minerals Useful Links Alaska Earthquake Information Center USGS Earthquake Report ... Search the Site GO TO: Denali Fault Earthquake November 3, 2002 The magnitude 7.9 Denali fault earthquake of November 3, 2002, resulted from predominantly right-lateral offset along portions of the Denali and Totschunda fault systems in Alaska. Total length of the surface rupture was about 320 kilometers (200 miles). The western 49 km of the rupture shows mainly low-angle thrust offset as much as 1.5 m, with the northwest side up. Shown here are the epicenters of the November 3 event (red) and the magnitude 6.7 foreshock of October 23, 2002 (blue), as well as two previously recorded large shallow earthquakes (yellow) in the vicinity of the fault. Because there were few seismometers in the region at the time, the locations of the earlier events are poorly constrained. Shown in yellow are other faults that show evidence of activity during Quaternary time (past two million years). Numbers show the locations of some of the following photographs. Figure by Rod Combellick, DGGS.

90. SMUGGLER'S COVE FIELD TRIP STOP because it contains a number of examples of significant geologic features. City Portuguese Bend Earthflow Livingston Quarry Smuggler s Cove and faults A brief http://seis.natsci.csulb.edu/VIRTUAL_FIELD/Palos_Verdes/pvsmug.htm

The Smuggler's Cove Field Trip Stop This site is often visited by the CSULB Field Geology class because it contains a number of examples of significant geologic features. Smuggler's Cove is nestled between Inspiration Point to the east and Portuguese Point toward the west. A minor fault runs through the rocks at Portuguese Point. This fracture in the bedrock is where local sections of Earth's crust have moved past one other, grinding rocks at the contact into a fine powder called fault gouge. Fault gouge is easily removed by erosion. At Portuguese Point, waves eroded some of the fault gouge, creating a tunnel through the base of the point. Upon closer inspection, the fault looks like this: Here the previous picture has been altered to clarify the location of the fault: The following picture was taken just east of the fault, at the tip of Portuguese Point during a low tide. It shows a marine (or wave-cut) platform that is currently being created. As ocean waves erode the coast, they carve relatively flat surfaces out of the bedrock. Tectonic forces may then uplift the marine platforms

91. GEOLOGIC STRUCTURES Geologic structure Feature produced by rock deformation; Types 1. Folds (bending); 2. Fractures (breaking); Joints no slippage; faults slippage occurs. FOLDS. http://www.pierce.ctc.edu/tbush/geol120/struct

GEOLOGIC STRUCTURES GEOL 120W PART I : GEOLOGIC PRINCIPLES (3 EXAMS) PART II : GEOLOGY OF THE NATIONAL PARKS AND MONUMENTS (POSTER SESSIONS) PART I-GEOLOGIC PRINCIPLES PLATE TECTONICS GEOLOGIC STRUCTURES GEOLOGIC TIME EXAM #3 (100 POINTS) GEOLOGIC STRUCTURES Sedimentary rocks deformed into folds, Nevada INTRODUCTION Geologic structures Features that result fr. rock deformation Deformation (metamorphism): directed pressure Creates stress Force acting on an object Geol. structures: results of stress ROCK DEFORMATION Confining stress: equal Deformational stress: directed Types of deformational stress Compression : squeezing Distortion: shortens rx At convergent boundaries ROCK DEFORMATION ROCK DEFORMATION ROCK DEFORMATION Tension (or extension ): pulling stress Stretches rx At divergent boundaries ROCK DEFORMATION ROCK DEFORMATION ROCK DEFORMATION Shear stress : sliding past force Distorts objects At transform boundaries ROCK DEFORMATION ROCK DEFORMATION ROCK DEFORMATION Strain Results of stress Distortion of rx or deformational changes Types of strain Elastic Objects return to original shape ROCK DEFORMATION Plastic Objects do NOT return to original shape Brittle Objects break ROCK DEFORMATION Factors 1. Nature of material

92. Friends Of Saguaro National Park - About Us: About Saguaro National Park: Geolog Folded limestones and weakly cemented gravels cover the fault. Geologists are trying to understand how these upper level rocks came to be adjacent to the deep http://www.friendsofsaguaro.org/geology.html

Geology The Scene Today Visitors to Saguaro National Park are often impressed by the rugged mountain landscapes and the saguaro forests of the Sonoran Desert. Major landforms include dry washes and large arroyos, which fill quickly after rainstorms; alluvial fans at the mouths of canyons, which combine to form long, sweeping slopes known as bajadas (ba-HAH-da); and pediments, which form where eroded bedrock extends out from the mountains. The present day scene has been in the making for millions of years. Although imperceptible to our eye, the desert is constantly changing. The ongoing story is told by the rocks. The geology of the Tucson area is complex and the interpretation of the physical evidence is under debate. The Rincon and Tucson Mountains offer very different geologic histories. Visitors ask questions, such as what type of rock is present or how the mountains came to be. Geologists ask the same questions with more specific interest in how the different rocks came together into complex yet systematically arranged mountain ranges. The Building Blocks Rincon Mountain District General Most of the mountains of the southwest have been uplifted on near-vertical faults about 15 million years ago (MYA). However, the Rincon Mountains, along with the Catalinas and Tortolitas, are part of a 3-humped core complex formed earlier. The highest peak in the Rincons is Mica Mountain. It is 8,666 feet in elevation and supports vegetation of the trans-Canadian

93. CSUSB Department Of Geological Sciences McGill, Sally F., Holocene activity on the central Garlock fault, in Geological Investigations of an Active Margin, Geological Society of America, Cordilleran http://geology.csusb.edu/fac/sally.htm

Dr. Sally F. McGill Professor of Geology Department of Geological Sciences Office: Biological Sciences Building, Room 110 Phone: (909) 880-5347 Email: smcgill@csusb.edu Teaching Responsibilities Course Number Course Title Last/Next Taught Geol 210 Earthquakes: Science and Public Policy Fall 2002 Geol 310 Regional Field Geology Fall 2002 Geol 312 Geology of California Winter 2002 Geol 330 Sedimentary Petrology Fall 2001 Geol 395 Directed Studies as needed Geol 540 Advanced Topics in Geology: (Neotectonics and Seismic Hazards) Spring 1995 Geol 545 Laboratory for Advanced Topics in Geology Spring 1995 Geol 590 Senior Seminar Spring 2001 Geol 595 Independent Studies as needed Current Research Projects Paleoseismology of the San Andreas fault Global Positioning System (GPS) measurements of deformation across the San Andreas and San Jacinto faults, near CSUSB, with Dr. Joan Fryxell, CSUSB Holocene fires in the Mojave Desert, with Dr. Richard Minnich, University of California, Riverside

94. Genral Features: References RA, 1969, Map showing recently active breaks along the San Andreas and related faults between Cajon Pass and Salton Sea, California US Geological Survey open http://www.johnmartin.com/earthquakes/eqsafs/safs_199.htm

Content Previous Next REFERENCES CITED Allen, C.R., 1968, The tectonic environment of seismically active and inactive areas along the San Andreas fault system, in Dickinson, W. R., and Grantz, Arthur, eds., Proceedings of conference on geologic problems of San Andreas fault system: Stanford, Calif., Stanford University Publications in the Geological Sciences, v. 11, p. 79-80. Atwater, Tanya, 1970, Implications of plate tectonics for the Cenozoic tectonic evolution of western North America: Geological Society of America Bulletin, v. 81, no. 12, p. 3513-3535. Atwater, Tanya, and Molnar, Peter, 1973, Relative motion of the Pacific and North American plates deduced from sea-floor spreading in the Atlantic, Indian and South Pacific oceans, in Kovach, R. L., and Nur, Amos, eds., Proceedings of the conference on tectonic problems of the San Andreas fault system: Stanford, Calif., Stanford University Publications in the Geological Sciences, v. 13, p. 136-148. Drummond, K.J., chairman, 1981, Pacific Basin sheet of Plate-tectonic map of the circum-Pacific region: Tulsa, Okla., American Association of Petroleum Geologists, scale 1:10,000,000. Dickinson, W.R., and Snyder, W.S., 1979, Geometry of triple junction related to the San Andreas transform: Journal of Geophysical Research, v. 84, no. B2, p. 561-572.,1979.

95. Department Of Geological Sciences Research -- Geologic Field Methods Quaternary faulting history along the Deep Springs fault, California (Geological Society of America Bulletin, 2001, v. 113, p. 855869). http://www.geology.cwu.edu/facstaff/lee/Pubs/DSF.abst.html

Quaternary faulting history along the Deep Springs fault, California (Geological Society of America Bulletin, 2001, v. 113, p. 855-869) Jeffrey Lee , Department of Geological Sciences, Central Washington University, Ellensburg, WA and Institute for Crustal Studies, University of California, Santa Barbara, CA; Charles M. Rubin , Department of Geological Sciences, Central Washington University, Ellensburg, WA; Andrew Calvert , Department of Geological Sciences, University of California, Santa Barbara, CA Abstract New geologic mapping, structural studies, geochronology, and diffusion erosion modeling along the Deep Springs fault, California shed light on its Quaternary faulting history. The Deep Springs fault, a 26 km long, predominantly NNE-striking, WNW-dipping normal fault bounding the eastern side of Deep Springs Valley, cuts Jurassic batholithic rocks nonconformably overlain by middle Miocene to Pleistocene stream gravels, coarse-grained sand, tuffaceous sand, unwelded to partially welded tuff, and Bishop Tuff tephra, as well as Quaternary coarse- to fine-grained alluvial fan deposits. Ar/ [Jeff Lee home] [Geological Sciences home] [CWU home]

96. Earthquakes And Seismology : CTI Centre For Geography, Geology And Meteorology Department of Geological Sciences, California State University Tour of the Hayward Fault Provides an illustrated brochure of Hayward Fault, reaching from http://www.geog.le.ac.uk/cti/quak.html

Earthquakes and Seismicity International and National Organisations International Seismological Centre International Association of Seismology and Physics of the Earth's Interior (US) Federation of Digital Broad-Band Seismograph Networks includes directory of national member organisations Royal Observatory of Belgium; Seismology (Belgium) Canadian National Earthquake Hazards Program (Canada) Council of the National Seismic System (US) Geological Survey of Canada (Canada) National Earthquake Information Center (US) Seismological Society of America (US) Research Centres Incorporated Research Institutions for Seismology : data collection and distribution. (US) Global Seismographic Network Programme for the Array Seismic Studies of the Continental Lithosphere British Geological Survey Global Seismology and Geomagnitism Group details of recent UK earthquakes environment earthquake monitoring and felt effects Italian Experimental Seismic Network event database and list of Italian stations. (Italy).

97. Alpine Fault, New Zealand Alpine Fault Department of geology http//www.otago.ac.nz/geology/ Website Created by Stephen Read Contents © Department of geology, University of Otago http://www.otago.ac.nz/geology/af/alpinefault.htm

Introduction Back to the large map Visit area: Styx 2-Hokitika 3-Mikonui 4-Waitaha ... 20-Arawata Tectonic setting of New Zealand: astride a plate boundary which includes the Alpine Fault New Zealand lies at the edge of both the Australian and Pacific tectonic plates. To the northeast of New Zealand, and underneath North Island, the Pacific Plate is moving towards, and being subducted below the Australian Plate. To the south of New Zealand, and underneath Fiordland, the two plates are also moving toward each other but here the Australian Plate is being subducted under the Pacific Plate. The Australian and Pacific Plates generally don't move smoothly past each other. They move in a series in a small rapid motions each of which is accompanied by one or more earthquakes (what is an earthquake?) . Deep earthquakes under North Island form a well defined band (seismic zone) running northeast from Marlborough through White Island. Shallow earthquakes tend to occur to the southeast of this seismic zone, while the deeper ones occur towards the northwest. The earthquakes form this pattern occur where the Pacific Plate is being subducted under the Australian Plate. This pattern of deeper earthquakes towards the northwest of North Island reflects the northwest dip (or slope) of the boundary between the two plates (the Benioff zone). Conversely, in the southwest of South Island where the Australian Plate is being subducted below the Pacific Plate, the deeper earthquakes occur on the southeast edge of the seismic zone where the Benioff zone dips steeply to the southeast.

98. Dataset: World Energy Project: Geologic Contacts, Faults And Bathymetric Contour World Energy Project Geologic Contacts, faults and Bathymetric Contours (line). ID 1943 Source US Geological Survey Libraries http://www.lib.ncsu.edu/stacks/gis/data19/data1943.html

Home Services Research Resources About the Libraries ... E-journal Finder Ask a Librarian Hours, Phone Numbers My Borrowing Record Request Items/TRIPSaver Search this Website Suggest a Purchase GIS Services Overview Services Data Training ... Home Page NCSU Libraries Site Help Comments Site Index Search Site World Energy Project: Geologic Contacts, Faults and Bathymetric Contours (line) ID: Source: U.S. Geological Survey Libraries World Energy Project Page: http://www.lib.ncsu.edu/stacks/gis/geolprov.html Format: Shapefile/e00/Generate Scale: Type: Line Date: Restrictions: None Spatial Extent: World Projection: Geographic Coordinates/Albers Conical Equal Area Map Units: decimal degrees/meters Datum: n/a Themes: Geologic Formations Faults Bathymetry (Click on terms to see related data resources) File Name: varies File Size: mb Internet Access: http://energy.cr.usgs.gov/oilgas/wep/products/geology.htm Metadata: http://energy.cr.usgs.gov/oilgas/wep/products/geology.htm Online Documentation: http://energy.cr.usgs.gov/oilgas/wep/products/geology.htm Live Web Mapping: http://energy.cr.usgs.gov/oilgas/wep/products/geology.htm

99. California Geological Survey California Geological Survey This is the home page for California's State Geological Survey. This page has information about hot topics and new products and reports issued by the Division of Mines http://rdre1.inktomi.com/click?u=http://www.consrv.ca.gov/cgs/index.htm&y=02

100. SF Bay Images The offshore portion of the San Gregorio fault is modified after ML Zoback clickable versions of these images on the web to make geological and seismological http://www.sfbayquakes.org/thumbnails.html

Thumbnails Map View North View West View East View ... Links These fantastic images are available as a map view or as perspective views looking North, East or West. We also have close ups of different places of interest in the area. Developed by Robert E. Crippen (JPL) and Ross Stein (USGS) these images drape Landsat TM satellite imagery over Digital Elevation Models to show the bay as it has never been seen before. The vertical exaggeration in the oblique views is three times; the view angle is 20 degrees below the horizontal. Active faults (which slipped during the past 10,000 years) are from C.W Jennings, Fault Activity Map of California (1994). The offshore portion of the San Gregorio fault is modified after M.L. Zoback et al (Journal of Geophysical Research v.104, 1999). All the images can be downloaded quickly for printing from your home computer on US Letter paper. Full size 6ft images can be downloaded or ordered from Digital Prism or Kinko's from this site, or you can take a file to any good copy service bureau that offers a poster printing service Click on an image below.

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