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4 days ago · ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes. These maps are used by federal, state, and local organizations, both public and private, for post-earthquake response and recovery, public and scientific information, as well as for preparedness exercises and disaster planning.
- Atlas
The Atlas of ShakeMaps (~14,100 earthquake, 1900-2019)...
- Latest Earthquakes
contributor ci maxlatitude 37.101 maxlongitude-111.951...
- Alaska
contributor ak maxlatitude 70.891 maxlongitude-138.428...
- Shakemap, a Tool for Earthquake Response
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- Atlas
2 days ago · PHIVOLCS Earthquake Intensity Scale (PEIS) Perceptible to people under favorable circumstances. Delicately balanced objects are disturbed slightly. Still Water in containers oscillates slowly. Felt by few individuals at rest indoors. Hanging objects swing slightly. Still Water in containers oscillates noticeably. Felt by many people indoors ...
May 12, 2024 · Depending on their intensity, earthquakes (specifically, the degree to which they cause the ground’s surface to shake) can topple buildings and bridges, rupture gas pipelines and other infrastructure, and trigger landslides, tsunamis, and volcanoes. These phenomena are primarily responsible for deaths and injuries.
- What are earthquake waves?Earthquake waves, more commonly known as seismic waves, are vibrations generated by an earthquake and propagated within Earth or along its surface....
- How is earthquake magnitude measured?Magnitude is a measure of the amplitude (height) of the seismic waves an earthquake’s source produces as recorded by seismographs. Seismologist Cha...
- Where do earthquakes occur?Earthquakes can occur anywhere, but they occur mainly along fault lines (planar or curved fractures in the rocks of Earth’s crust), where compressi...
May 3, 2024 · A new study by Northwestern University researchers and coworkers examined earthquake hazard maps from five countries and shaking data from past earthquakes and found that all the maps seemed to overpredict the historically observed earthquake shaking intensities.
May 6, 2024 · Credit: Public Domain. The location where an earthquake begins is called the epicenter. An earthquake’s most intense shaking is often felt near the epicenter. However, the vibrations from an earthquake can still be felt and detected hundreds, or even thousands of miles away from the epicenter. How Do We Measure Earthquakes?
May 13, 2024 · Map of Haiti depicting the intensity of shaking and the degree of damage incurred by the January 12, 2010, earthquake. (more) The earthquake hit at 4:53 pm some 15 miles (25 km) southwest of the Haitian capital of Port-au-Prince. The initial shock registered a magnitude of 7.0 and was soon followed by two aftershocks of magnitudes 5.9 and 5.5.
May 1, 2024 · These include CHIMP (California Historical Intensity Mapping Project) which combines data from seismometers with historical data (termed seismic intensity) that measures ground shaking caused by...
