Science Explorer
Exploring: Epicenter
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Earthquakes
The latest and historical earthquakes, hazards information, educational resources, maps, seismographic stations and real-time recording, current research in plain language, data, software and derived products.
The intensity signature of induced seismicity
We analyze a comprehensive database of ∼63,000">∼63,000 geocoded community intensity observations from >400">>400 earthquakes of moment magnitude M≥3.5">M≥3.5 in Oklahoma from 2010 to 2016 to define the intensity signature of induced events. We show that natural and induced...
Intensities, aftershock sequences, and the location of the 1936 Milton‐Freewater earthquake near the Oregon–Washington border, U.S.A.
The epicenter of the 16 July 1936 M">MM 6 Milton‐Freewater earthquake, also known as the State Line earthquake and the largest historical earthquake in northeastern Oregon or southeastern Washington, is uncertain. Various studies place the epicenter of the earthquake, which was widely felt in eastern Washington, northeastern Oregon,...
Past role and future outlook of the Conservation Reserve Program for supporting honey bees in the Great Plains
Human dependence on insect pollinators continues to grow even as pollinators face global declines. The Northern Great Plains (NGP), a region often referred to as America’s last honey bee (Apis mellifera) refuge, has undergone rapid land-cover change due to cropland expansion and weakened land conservation programs. We conducted a trend analysis...
Attribution: Northern Prairie Wildlife Research Center
Meredith B. Nevers is a research ecologist with the U.S. Geological Survey, Great Lakes Science Center in Porter, Indiana. She received her B.A. in biology/English from Wittenberg University and her M.S. in marine biology from the University of North Carolina at Wilmington. She has worked with the USGS for the past 17 years....
Murulee Byappanahalli, Ph. D. is a Research Microbiologist with the U.S. Geological Survey Great Lakes Science Center. He received his MS and Ph. D. degrees in Microbiology from theUniversity of Hawaii at Manoa. His research interests include microbial ecology, soil microbiology,...
Earthquake early warning systems like ShakeAlert work because the warning message can be transmitted almost instantaneously, while shaking waves from the earthquake travel through the Earth at speeds of a few miles per second. When an earthquake occurs, seismic waves—including compressional (P) waves, transverse (S) waves, and...
Tsunami wavefield approximately 6 minutes after rupture initiation (origin time), view to the northwestThis animation shows the evolution of tsunami waves caused by the December 26, 2004 Sumatra-Andaman earthquake. Because it takes approximately 8 minutes for the entire fault to break, tsunami waves generated near the epicenter have propagated...
The December 26, 2004 magnitude (M) 9.1 Sumatra-Andaman earthquake occurred along a tectonic subduction zone in which the India Plate, an oceanic plate, is being subducted beneath the Burma micro-plate, part of the larger Sunda plate. The boundary between the downgoing and overriding plates of the subduction zone is marked by the Sunda Trench...
Map shows location of earthquake epicenter (star). km, kilometers; mi, miles.
Map shows past earthquakes and the epicenter of the September 28, 2018 Palu, Indonesia earthquake.
PublicationsÇelebi, M., Toksöz, N. and Büyüköztürk, O., 2014, Rocking behavior of an instrumented unique building on the MIT campus identified from ambient shaking data,Earthquake Spectra, v30,no.2, pp.705-720, may 2014 [Link]Çelebi, M., Okawa, I., and Kashima, T., S. Koyama, and M. Iiba, 2014, Response of a tall building far from the...
Earthquakes have been documented in the northeastern Caribbean since the arrival of Columbus to the Americas; written accounts of these felt earthquakes exist in various parts of the world. To better understand the earthquake cycle in the Caribbean, the records of earthquakes in earlier catalogs and historical documents from various archives,...
Map shows past earthquakes and the epicenter of the September 5, 2018 Hokkaido, Japan earthquake
The USGS has up-to-date details on the September 5, 2018 event.
More than 22 million people live along Southern California’s coast, and many more migrate there every year. Faults and earthquake threats in this region have been heavily studied on land. USGS aims to boost our knowledge about faults on the seafloor, so they can be included in hazard assessments.
The Central Virginia seismic zone (CVSZ) comprises an area of about 13,000 km2 in the Piedmont of central Virginia; seismicity in this zone is relatively frequent, but generally mild in magnitude. The August 2011 event was the largest earthquake recorded in the CVSZ since the development of modern seismic monitoring, and highlighted how little we...
Natural Hazards, Earthquake Hazards, National Cooperative Geologic Mapping Program, Florence Bascom Geoscience Center, Geologic Hazards Science Center, Geology, Geophysics, and Geochemistry Science Center
Definitions of landslide science terms.
(a–d) Evolution of landslide map with (e–h) four major updates to the USGS ShakeMap, in which the ShakeMap version and release time relative to the earthquake time are labeled below each map; the star indicates the epicenter; triangles and circles show seismic and “Did You Feel It?” data; and polygons show fault segments...
Today's update for June 21st, 2018 will be the last of the daily updates on this USGS feature story. We encourage you to keep checking the USGS Hawaiian Volcano Observatory (HVO) Kīlauea status website for daily activity updates. You can also visit the USGS Facebook page and the USGS Twitter feed as updates...
Jess Rodysill from the Eastern Geology and Paleoclimate Science Center is collecting ground-penetrating radar (GPR) data from three man-made reservoirs near the epicenter of the 2011 Mineral, Virginia earthquake with colleague Mark Carter. In the photo, Jess Rodysill is connecting power and data cables on the GPR system to set up the equipment for...