Saturday, January 26, 2008

Guate Earthquakes

Guatemala, like my home state of California, is a land of earthquakes.
A short trip, via USGS, through the history of recent major eruptions names three:
On 4/19/1902 , there was a 7.5 magnitude earthquake with 2000 known fatalities.
This report doesn't mention 1917, but another refers to a big one in that year.
On 2/04/1976, there was another 7.5 with 23,000 fatalities. Both of these were on the Santa Marta fault, located NE of Gua City.
I was just reading a memoir of a woman living in Belize, at that time (country to the East of Guatemala, on the Pacific) whose house rocked with that quake. Our co-worker Carlos' family got trapped inside their house just north of Antigua. It is said that most of the adobe block structures collapsed....and probably initiated the changeover to concrete block houses. That earthquake was said to be 1/16 of the force of the 1905 San Francisco quake. ONE-SIXTEENTH!
I think it was 1979 that California had another major earthquake, centered in Loma Prieta near Watsonville, where my husband rode a bus that, he said, drove side to side over the highway moving under it, and of course in W. Oakland, near where my daughter lives, a freeway collapsed, killing a hundred people or so.

In very recent history, on 6/13/07, when I was here there was a 6.7 magnitude quake whose epicenter was offshore SE of Gua/Antigua. No fatalities. I remember watching the ground move back and forth outside my house. The latest one reported in the USGS report, was Friday 1/11 2008.....70 mi SSE Gua City (again off shore.) I think that was when I just bolted straight outside, to meet my neighbors standing there.
The earth writhes in convulsions once in awhile, letting us know her power. It's not hard to imagine what those convulsions might be about.

This report also mentions the Santa Marta earthquake on July 29, 1773, which "destroyed" Antigua nearly completely. No magnitude was given for that one, or probably recorded.
The deluge of water from Volcan Agua in 9/11/1541 destroyed Ciudad Vieja and killed the pretended governor(ess) as well as 599 other people. I've heard that an earthquake from Fuego triggered the water-"spill." But other reports cite the volume of water building up in the caldera of Volcan Agua. Agua evidently erupted 80,000 times, but the last volcanic activity there was 10,000 years ago.

A short, but active history.

No comments: