Has there ever been a 9.2 earthquake?

On Ma at 5:36pm local time (March 28 at 3:36 UTC) an earthquake of magnitude 9.2 occurred in the Prince William Sound region of Alaska.

earthquake.usgs.gov - M9.2 Alaska Earthquake and Tsunami of March 27, 1964

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Map of southern Alaska showing the epicenter of the 1964 Alaska Earthquake (red star). Click to view a larger image On March 27, 1964 at 5:36pm local time (March 28 at 3:36 UTC) an earthquake of magnitude 9.2 occurred in the Prince William Sound region of Alaska. The earthquake rupture started approximately 25 km beneath the surface, with its epicenter about 6 miles (10 km) east of the mouth of College Fiord, 56 miles (90 km) west of Valdez and 75 miles (120 km) east of Anchorage. The earthquake lasted approximately 4.5 minutes and is the most powerful recorded earthquake in U.S. history. It is also the second largest earthquake ever recorded, next to the M9.5 earthquake in Chile in 1960. The map shows the epicenter of the 1964 Alaska Earthquake (red star), caused when the Pacific Plate lurched northward underneath the North American Plate.

Scientific Background

Videos

News and Media

Alaska Science Forum: Feet on the Ground Right After Alaska’s Big One Ned Rozell’s personal account of his meeting with George Plafker, one of three USGS Geologists who responded to the Alaska quake a few days after event. Plafker spent most of the summer in Alaska researching and documenting the earthquake. Why the 1964 Alaska Earthquake Matters 50 Years Later The 1964 earthquake was a defining moment in a territory that had just achieved statehood. Fifty years later, it continues to shape Alaska, its people, and the science of earthquakes. This opinion piece by USGS geologist Peter Haeussler, et al. briefly recounts the events of March 27, 1964 and explains the scientific and societal importance of the earthquake.

Historic USGS Publications

Alaska’s Good Friday Earthquake, a preliminary geologic evaluation USGS circular published one month after the earthquake by Arthur Grantz, George Plafker, and Reuben Kachadoorian detailing their scientific investigations of the quake. Maps Showing Seismic Landslide Hazards in Anchorage, Alaska Seismically triggered landslides are one of the greatest geologic hazards in Anchorage. These maps, by Randall W. Jibson and John A. Michael, depict seismic landslide hazards in Anchorage and are an important tool for planning, zoning, and emergency-response preparation.

Professional Papers

Conferences

2014 Seismological Society of America Annual Meeting SSA’s 2014 Annual Meeting will provide a stimulating exchange of research on a wide range of topics with colleagues from all over the world. Oral presentations, poster sessions, exhibits, field trips, business meetings and social gatherings all provide participants the opportunity to meet and share with their peers. April 30–May 2, 2014 in Anchorage, Alaska. 10NCEE—10th US National Conference on Earthquake Engineering The Tenth U.S. National Conference on Earthquake Engineering will provide an opportunity for researchers and practitioners to share the latest knowledge and techniques to mitigate the damaging effects of earthquakes and tsunamis. July 21–25, 2014 in Anchorage, Alaska.

What is Japan's biggest earthquake?

On Ma, Japan experienced the strongest earthquake in its recorded history. The earthquake struck below the North Pacific Ocean, 130 kilometers (81 miles) east of Sendai, the largest city in the Tohoku region, a northern part of the island of Honshu. The Tohoku earthquake caused a tsunami.

nationalgeographic.org - Mar 11, 2011 CE: Tohoku Earthquake and Tsunami

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