Teachable Moments

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July 29, 2021 (06:15:47 UTC)

Quake Location

Magnitude 8.2 Alaska

At 10:15pm Alaska time on July 28, a magnitude 8.2 earthquake struck offshore of the Alaska Peninsula at a depth of 32 km. This was the largest U.S. earthquake in 50 years. No major damage was reported.


May 21, 2021 (18:04:13 UTC)

Quake Location

Magnitude 7.3 Southern Qinghai, China

A magnitude 7.3 earthquake jolted China’s sparsely populated Qinghai province in the northwest. There were no immediate reports of casualties or damage from the remote area.


March 20, 2021 (09:09:45 UTC)

Quake Location

Magnitude 7.0 Japan

A major magnitude 7.0 earthquake struck Saturday off the coast of Ishinomaki, a city located just 65 miles (104 km) from Fukushima, Japan at a depth of 54 km (34 miles). The earthquake shook buildings as far as Tokyo and triggered a tsunami advisory for a part of the northern coast. No major damage was reported, but several people had minor injuries.


March 11, 2011 (05:46:24 UTC)

Quake Location

Magnitude 9.1 Japan (Historical Earthquake)

Ten years ago today a magnitude 9.1 earthquake occurred in Japan. The earthquake struck off the northeastern coast of Honshu, Japan’s main island, and initiated a series of large tsunami waves that devastated many coastal areas of the country, most notably in the Tōhoku region (northeastern Honshu). The tsunami also instigated a major nuclear accident at a power station along the coast.


March 4, 2021 (13:27:36 UTC)

Quake Location

Magnitude 7.3 New Zealand & 7.4, 8.1 Kermadec Islands

Three large earthquakes occurred along the Kermadec Trench, north of New Zealand. The earliest and southern-most earthquake (M 7.3 at 13:27 UTC) occurred northeast of Gisborne, New Zealand at a depth of 20 km. The M 7.4 and M 8.1 earthquakes occurred at 17:41 and 19:28 UTC respectively near the Kermadec Islands, New Zealand.  Given the ~950 km distance from the M 7.3 to the two larger earthquakes, it is unlikely the M 7.3 triggered the two larger events.


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