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  2. Advanced National Seismic System - Wikipedia

    en.wikipedia.org/wiki/Advanced_National_Seismic...

    Logo of the ANSS. The Advanced National Seismic System (ANSS) is a collaboration of the United States Geological Survey (USGS) and regional, state, and academic partners that collects and analyzes data on significant earthquakes to provide near real-time (generally within 10 to 30 minutes [1]) information to emergency responders and officials, the news media, and the public. [2]

  3. ShakeMap - Wikipedia

    en.wikipedia.org/wiki/ShakeMap

    According to the USGS, "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 ...

  4. List of earthquakes in California - Wikipedia

    en.wikipedia.org/wiki/List_of_earthquakes_in...

    Probabilistic seismic hazard map. The earliest known earthquake in the U.S. state of California was documented in 1769 by the Spanish explorers and Catholic missionaries of the Portolá expedition as they traveled northward from San Diego along the Santa Ana River near the present site of Los Angeles. Ship captains and other explorers also ...

  5. Two sets of earthquake swarms have hit California. What's ...

    www.aol.com/news/california-mexico-border-hit...

    A map shows earthquakes above magnitude 2.5 that struck in the last week in Southern California. Quakes marked in orange occurred over a 24-hour period ending at 9 a.m. Monday, while those in ...

  6. Strong quake strikes off California, tsunami warning canceled

    www.aol.com/news/magnitude-7-earthquake-strikes...

    The National Weather Service said that the tsunami warning that extended along 500 miles (800 km) of the California and Oregon coasts was called off about 90 minutes after the earthquake struck at ...

  7. Two earthquakes, centered in Ontario, rattle Southern California

    www.aol.com/news/two-earthquakes-centered...

    A pair of modest earthquakes rattled Southern California on Saturday morning, with epicenters in Ontario. The earthquakes, of magnitudes 3.5 and 3.9, occurred within about a half hour of each other.

  8. Southern California faults - Wikipedia

    en.wikipedia.org/wiki/Southern_California_faults

    The probability of a serious earthquake on various faults has been estimated in the 2008 Uniform California Earthquake Rupture Forecast. According to the United States Geological Survey, Southern California experiences nearly 10,000 earthquakes every year. [3] Details on specific faults can be found in the USGS Quaternary Fault and Fold Database.

  9. Small earthquakes mount in Southern California - AOL

    www.aol.com/news/small-earthquakes-mount...

    On Friday, at 10:26 a.m., a magnitude 3.6 earthquake — down from an original estimate of 3.8 — occurred with an epicenter just north of the Ojai Valley, causing weak shaking to be felt from ...