On July 29, 2021 a major earthquake occurred offshore Alaska. The massive quake was recorded in Spring, TX, at IRIS Station E1TX (shown first) on an EQ1 seismograph. The event was also recorded on a Raspberry Shake (Station R5DDF) co-located in Spring, TX; filtered seismograms (shown last) of the waveforms were easily identified and are very intriguing.
“The magnitude-8.2 Chignik Earthquake, which struck at 10:15 p.m. local time on Wednesday (0615 GMT Thursday) just off the Aleutians, was the strongest felt in the United States since an 8.7 quake ripped through the western Aleutian Islands in 1965.”
Because the epicenter was located offshore , away from highly populated towns, and at a depth greater than 30 km, injuries and damages were limited.
The M8.2 quake was significant enough for a tsnuami warning to be issued for the immediate region.
“In Alaska, small tsunami waves measuring under a foot (30 cm) above tide level were observed in Sand Point, Old Harbor, King Cove, Kodiak, Unalaska and Alitak Bay, according to the U.S. National Tsunami Warning Center (NTWC).”. Read more from Reuters HERE.