New paleoseismic data from the northern San Jacinto Fault Zone, southern California Nate Onderdonk (CSULB) Tom Rockwell (SDSU) Sally McGill (CSUSB) Gayatri.

Slides:

Advertisements

Similar presentations

New Mapping of Creeping Faults Bartlett Springs Fault & northern Green Valley Fault

Advertisements

Deforming the Earth’s Crust

Slip Rate Studies Along the Sierra Madre-Cucamonga Fault System Using Geomorphic and 10 Be Cosmogenic Surface Exposure Age Constraints.

Plate Tectonics & how plates work. Transform boundary also called a conservative boundary Two tectonic plates slide past one another Convection currents.

16/9/2011UCERF3 / EQ Simulators Workshop RSQSim Jim Dieterich Keith Richards-Dinger UC Riverside Funding: USGS NEHRP SCEC.

Recurrence Intervals Frequency – Average time between past seismic events – aka “recurrence interval” Recurrence Interval = Average slip per major rupture.

Ch 3: Characterization of the SFBR Earthquake Sources Working Group on California Earthquake Probabilities, 2002.

Faults & Topography. What’s a Fault? A fault is a break in the rock that makes up the Earth’s crust. The surfaces on either side of the break move past.

A New Approach To Paleoseismic Event Correlation Glenn Biasi and Ray Weldon University of Nevada Reno Acknowledgments: Tom Fumal, Kate Scharer, SCEC and.

Using Geodetic Rates in Seismic Hazard Mapping March 30, Geodetic and Geologic slip rate estimates for earthquake hazard assessment in Southern California.

Locating the source of earthquakes Focus - the place within Earth where earthquake waves originate Epicenter on an earthquake– location on the surface.

Plate tectonics. Continent-continent collisions.

What happens at tectonic plate boundaries?

Plate Boundaries and California

Earthquakes Faults Stress Quakes at plate boundaries Quakes within plates.

The San Francisco Earthquake of 1906 Learning from the Past to Advance the Future By Mrs. Cheney.

Earthquake potential of the San Andreas and North Anatolian Fault Zones: A comparative look M. B. Sørensen Department of Earth Science, University of Bergen,

NA-Pa Plate Boundary Wilson [1960] USGS Prof. Paper 1515.

U.S. Earthquake Frequency Estimation - Ratemaking for Unusual Events CAS Ratemaking Seminar Nashville, Tennessee March 11-12, 1999 Stuart B. Mathewson,

But they are clustered along the Pacific Coast. Why?

Paleoseismic and Geologic Data for Earthquake Simulations Lisa B. Grant and Miryha M. Gould.

Seismic Hazard Assessment for the Kingdom of Saudi Arabia

Lisa Wald USGS Pasadena U.S. Department of the Interior U.S. Geological Survey USGS Earthquake Hazards Program Earthquakes 101 (EQ101)

1857 Rupture 300 km Ray Weldon (with material from colleagues and students) How to do Paleoseismology for SOSAFE.

Part 8: Fold Types. Tensional Stress Compressive Stress Shear Stress Orientation of stress leads to different folds.

Plate Tectonics Wrap-Up

National Seismic Hazard Maps and Uniform California Earthquake Rupture Forecast 1.0 National Seismic Hazard Mapping Project (Golden, CO) California Geological.

Deforming the Earth’s Crust

Compilation to date Much of the deformation at the Wrightwood site is distributed across complicated small faults and folds that, in the.

Bell Work: September 3 Define The Plate Tectonic Theory What are some ways that plate tectonics change the surface of the earth?

Chapter 3: Soil Sampling And Soil Sensing

3 Types of Stress 1. Tension: stress that pulls rock apart Rock gets thinner in the middle 2. Compression: stress that pushes rock together 3. Shearing:

Starter/Practice: Connection : Application/ Notes 1/7/15 Plate Boundaries Notes How do you think the continents formed? Plate Boundaries Notes.

112/16/2010AGU Annual Fall Meeting - NG44a-08 Terry Tullis Michael Barall Steve Ward John Rundle Don Turcotte Louise Kellogg Burak Yikilmaz Eric Heien.

The repetition of large earthquakes, with similar coseismic offsets along the Carrizo segment of San Andreas fault has been documented using geomorphic.

Using this approach we have integrated all of the tidal and leveling records from coastal Oregon to determine the 3d uplift pattern along the coast. Topography.

Geologic and Anthropologic Histories of the Kuril Islands, Russia Amy Tice, Senior, Earth and Space Sciences, AnthropologyMentor: Joanne Bourgeois, Earth.

Earthquakes 101 (EQ101) Lisa Wald USGS Earthquake Hazards Program

Geologic Time. Rocks Record Earth History Rocks record geological events and changing life forms of the past. We have learned that Earth is much older.

Starter/Practice: Connection : Application/ Notes 1/6/16 Plate Boundaries Notes How do you think the continents formed? Plate Boundaries Notes.

1 Wallace Creek, USGS aerial view, about 1990 USGS Photo.

Seismic Waves and Scales. Natural vibrations of ground caused by movement along fractures in Earth’s crust. Earthquakes can cause major damage. EQ Destruction.

Plate Boundaries Where things happen!!!!.

 The lithosphere is broken up into what are called tectonic plates. In the case of Earth, there are currently eight major and many minor plates  Earthquakes,

Falcon Focus Rank the four main layers of the earth from least dense to most dense. What causes the plate tectonics to move?

Earthquakes. Earthquake the shaking of the Earth’s surface caused by movement along a fault. geological event, not related to weather.

Continental Drift.

Fault Types ~Notes~.

By: Andrea Jimeno Martinez 4ºA

Examples of Fault Types.

“It’s an earthquake”.

San Bernardino Alliance

Image #1 Image Analysis: What do you think is going on in this picture? Which person, thing, or event does this image relate to (which Word Wall term)?

Inside Earth 1.2 & 1.5.

Earth’s Crust Changes.

Plate Tectonics How do rock layers form?.

Plate boundaries and california

Image #1 Image Analysis: What do you think is going on in this picture? Which person, thing, or event does this image relate to (which Word Wall term)?

Aseismic Slip and Repeating Earthquakes on the San Andreas Fault

6.2 Notes Plate Boundaries

Image #1 Image Analysis: What do you think is going on in this picture? Which person, thing, or event does this image relate to (which Word Wall term)?

Image #1 Image Analysis: What do you think is going on in this picture? Which person, thing, or event does this image relate to (which Word Wall term)?

Jeopardy Final Jeopardy Tectonic Plates Divergent Transform Convergent

Guide to plate movement

Image #1 Image Analysis: What do you think is going on in this picture? Which person, thing, or event does this image relate to (which Word Wall term)?

Introduction to Faults.

Plate Tectonics July 29, 2019.

by Julian C. Lozos Science Volume 2(3):e March 11, 2016

Image #1 Image Analysis: What do you think is going on in this picture? Which person, thing, or event does this image relate to (which Word Wall term)?

Presentation transcript:

New paleoseismic data from the northern San Jacinto Fault Zone, southern California Nate Onderdonk (CSULB) Tom Rockwell (SDSU) Sally McGill (CSUSB) Gayatri Marliyani (SDSU) Funded by SCEC

2 topography along the fault zone (google earth?) 2 Image from Site Location- northern San Jacinto fault zone San Andreas Fault San Jacinto Fault

Mystic Lake Site

Mystic Lake site seen in 1940 Air Photo

NESWsoutheast wall

3 more shallow trenches in saw same relationships. Trench 6 Trench 7

Depositional model 1. Event on SW fault strand causes subsidence 2. Sag fills with clay, silt, sand 3. Soil layer develops 4. Repeat NESWsoutheast wall

Years AD

Mystic Lake events normalized probability density functions Recurrence Interval= 159 to 210 years

Comparing Mystic Lake events to Hog Lake record ? ?

Comparison with SAF record

Comparison with Wrightwood record

Conclusions Mystic Lake is a great source of paleoseismic info for the SJF and has potential for a long record Shallow trenches show evidence for 7 events in past 1700 years (avg. RI = 185 years) Non-Conclusions Some events may correlate with Hog Lake events? and maybe Wrightwood as well? if so: San Jacinto step-over is not a segment boundary, and neither is juncture with SAF

400m long trench

Correlated stratigraphy across the entire sag SW fault zone is locus of activity