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Today in Earthquake History

Today in Earthquake History

Today's Earthquake Fact:
The term seismic seiche was first coined by Anders Kvale in 1955, to describe oscillation of lake levels in Norway and England caused by the Assam earthquake of August, 1950.

May   21

Note: All earthquake dates are UTC, not local time.


Year Location Magnitude Comment
1850 Milan, Italy   Giuseppe Mercalli born. Italian volcanologist and seismologist. Inventor of the Mercalli Intensity Scale (1902). The scale assigns an intensity or rating to measure the effects of an earthquake at a particular location.
See: Modified Mercalli Intensity Scale.
1950 Central Peru

Epicenter
6.0 The earthquake caused destruction in Cuzco and San Sebastian. 83 people killed, and 200 injured.
From United States Earthquakes, 1950.
1960 Arauco Peninsula, Chile

Epicenter
7.9 Some deaths.
Some people injured and severe damage in the Lebu-Concepcion area. Most of the damage and casualties occurred in unreinforced masonry buildings that had survived but were likely weakened by the 1939 Chillan quake. A small tsunami was recorded at Talcahuano, Valparaiso and at other places along the coast of Chile, but caused no damage. This is the largest of 4 foreshocks magnitude 7.2 or greater for the magnitude 9.5 Valdivia earthquake on May 22. Most of the damage in Concepcion was due to this foreshock; the mainshock did little additional damage in this area.
1984 Eastern China

Epicenter
6.0 Several people injured jumping from buildings and slight damage in the southern Shanghai-Rudong area. Felt throughout southern Jiangsu Province and at Hefei. Felt on about 200 fishing boats in the Yellow Sea.
From Significant Earthquakes of the World, 1984.
1997 India

Epicenter
5.8 Local time: May 22.
At least 38 people killed, more than 1,000 injured, thousands homeless and extensive damage in the Jabalpur area. Felt in much of Madhya Pradesh. Also felt at Allahabad, Delhi, Nagpur and in parts of western Orissa. Two events about 1 second apart.
See also: Jabalpur Earthquake of May 22, 1997.

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