USGS announces awards for 2018 earthquake monitoring and research
The U.S Geological Survey announces that the agency has awarded more than $20 million in 2018 for earthquake monitoring and applied research.Read Story
Better Performance and New Features on Earthquake Website
Better performance and new features: landslides and liquefaction estimates, population map layer, Spanish Did You Feel It?, and aftershock forecasts.Read More
Seismic Sensors Record a Hurricane’s Roar
Newly installed infrasound sensors at a Global Seismographic Network station on Puerto Rico recorded the sounds of Hurricane Maria passing overhead.Read Story
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Miscellaneous High-Resolution Seismic Imaging Investigations in Salt Lake and Utah Valleys for Earthquake Hazards
Introduction In support of earthquake hazards and ground motion studies by researchers at the Utah Geological Survey, University of Utah, Utah State University, Brigham Young University, and San Diego State University, the U.S. Geological Survey Geologic Hazards Team Intermountain West Project conducted three high-resolution seismic imaging...Stephenson, W.J.; Williams, R.A.; Odum, J.K.; Worley, D.M.
Earthquake Rate Model 2.2 of the 2007 Working Group for California Earthquake Probabilities, Appendix D: Magnitude-Area Relationships
Summary To estimate the down-dip coseismic fault dimension, W, the Executive Committee has chosen the Nazareth and Hauksson (2004) method, which uses the 99% depth of background seismicity to assign W. For the predicted earthquake magnitude-fault area scaling used to estimate the maximum magnitude of an earthquake rupture from a fault's length...Stein, Ross S.
Historical changes in the Mississippi-Alabama barrier islands and the roles of extreme storms, sea level, and human activities
An historical analysis of images and documents shows that the Mississippi-Alabama (MS-AL) barrier islands are undergoing rapid land loss and translocation. The barrier island chain formed and grew at a time when there was a surplus of sand in the alongshore sediment transport system, a condition that no longer prevails. The islands, except Cat,...Morton, Robert A.
Morphology and texture of modern sediments on the inner shelf of South Carolina's Long Bay from Little River Inlet to Winyah Bay
High-resolution sea-floor mapping techniques, including sidecan-sonar, seismic-reflection, swath bathymetric systems, and bottom sampling, were used to map the geologic framework offshore of the northern South Carolina coast in order to provide a better understanding of the physical processes controlling coastal erosion and shoreline change. Four...Denny, J.F.; Baldwin, W.E.; Schwab, W.C.; Gayes, P.T.; Morton, R.; Driscoll, N.W.
Rotational Seismology and Engineering Applications - Online Proceedings for the First International Workshop: Menlo Park, California, U.S.A.-September 18 to 19, 2007Lee, William H K.; Celebi, Mehmet; Todorovska, Maria I.; Diggles, Michael F.
Rotational Seismology Workshop of February 2006
Introduction A successful workshop titled 'Measuring the Rotation Effects of Strong Ground Motion' was held simultaneously in Menlo Park and Pasadena via video conference on 16 February 2006. The purpose of the Workshop and this Report are to summarize existing data and theory and to explore future challenges for rotational seismology,...Evans, John R.; Cochard, A.; Graizer, Vladimir; Huang, Bor-Shouh; Hudnut, Kenneth W.; Hutt, Charles R.; Igel, H.; Lee, William H.K.; Liu, Chun-Chi; Majewski, Eugeniusz; Nigbor, Robert; Safak, Erdal; Savage, William U.; Schreiber, U.; Teisseyre, Roman; Trifunac, Mihailo; Wassermann, J.; Wu, Chien-Fu
Near-Surface Structure and Velocities of the Northeastern Santa Cruz Mountains and the Western Santa Clara Valley, California, From Seismic Imaging
Introduction The Santa Clara Valley (SCV) is located in the southern San Francisco Bay area of California and is bounded by the Santa Cruz Mountains to the southwest, the Diablo Ranges to the northeast, and the San Francisco Bay to the north (Fig. 1). The SCV, which includes the City of San Jose, numerous smaller cities, and much of the high-...Catchings, R.D.; Gandhok, G.; Goldman, M.R.; Steedman, Clare
Comprehensive Areal Model of Earthquake-Induced Landslides: Technical Specification and User Guide
This report describes the complete design of a comprehensive areal model of earthquakeinduced landslides (CAMEL). This report presents the design process, technical specification of CAMEL. It also provides a guide to using the CAMEL source code and template ESRI ArcGIS map document file for applying CAMEL, both of which can be obtained by...Miles, Scott B.; Keefer, David K.
Earthquakes Pose a Serious Hazard in Afghanistan
This report is USGS Afghanistan Project No. 155. This study was funded by an Interagency Agreement between the U.S. Agency for International Development (USAID) and the U.S. Geological Survey. Afghanistan is located in the geologically active part of the world where the northward-moving Indian plate is colliding with the southern part of the...Crone, Anthony J.
WOVOdat Design Document: The Schema, Table Descriptions, and Create Table Statements for the Database of Worldwide Volcanic Unrest (WOVOdat Version 1.0)
WOVOdat Overview During periods of volcanic unrest, the ability to forecast near future activity has been a primary concern for human populations living near volcanoes. Our ability to forecast future activity and mitigate hazards is based on knowledge of previous activity at the volcano exhibiting unrest and knowledge of previous activity at...Venezky, Dina Y.; Newhall, Christopher G.
Terrestrial LIDAR investigation of the December 2003 and January 2007 activations of the Northridge Bluff landslide, Daly City, California
On December 20, 2003 and again on January 1, 2007, landslides occurred along the coastal bluff that forms the west boundary of Daly City, California sending debris as far as 290 meters downhill and 90 meters into the ocean. This area is known for large landslide events where 150-meter tall coastal bluffs extend southward along the west boundary of...Collins, Brian D.; Kayen, Robert; Reiss, Thomas; Sitar, Nicholas
The International Geomagnetic Reference Field, 2005
This is a set of five world charts showing the declination, inclination, horizontal intensity, vertical component, and total intensity of the Earth's magnetic field at mean sea level at the beginning of 2005. The charts are based on the International Geomagnetic Reference Field (IGRF) main model for 2005 and secular change model for 2005-2010. The...Rukstales, Kenneth S.; Love, Jeffrey J.
Flood waters inundated Grand Forks, North Dakota and East Grand Forks, Minnesota.The picture is looking west to Grand Forks, North Dakota and the USGS gage house is the small white square in the center of the picture.