STOCK MARKET BSE NSE

Huge Quakes May Rock San Francisco: Study

A big quake or a cluster of large earthquakes may shake up the San Francisco bay region of California in the coming decades, an alarming study indicated.

Published: 20th May 2014 05:30 PM  |   Last Updated: 20th May 2014 05:30 PM   |  A+A-

WASHINGTON: A big quake or a cluster of large earthquakes may shake up the San Francisco bay region of California in the coming decades, an alarming study indicated.

Seismic activity in the San Francisco bay region of California appears to follow a cyclical pattern, the scientists, who studied historical earthquake records from 1776 to 2012, noted.

The researchers also studied palaeoseismic data, which come from radiocarbon dating and evidence of movement in the layers of rock at fault sites, dating back to 1600.

Tremors in the region follow a cyclical pattern, pointing to a cluster of earthquakes between 1690 and 1776 followed by a period of low seismicity that persisted until the big quake in 1906, the findings showed.

"The idea is that stress builds up, is released and builds up again," says David Schwartz, a geologist with the US Geological Survey in California, was quoted as saying.

When the 1906 earthquake occurred, stress was released and the frequency of quakes in the region dropped dramatically, leaving the region relatively unscathed for more than a century, he added.

"we have accumulated enough stress in the Bay Area’s crust that we should start to see the occurrence of more larger earthquakes, and that could be at any time,” Schwartz warned.

The findings appeared in the journal Bulletin of the Seismological Society of America.



Comments

Disclaimer : We respect your thoughts and views! But we need to be judicious while moderating your comments. All the comments will be moderated by the newindianexpress.com editorial. Abstain from posting comments that are obscene, defamatory or inflammatory, and do not indulge in personal attacks. Try to avoid outside hyperlinks inside the comment. Help us delete comments that do not follow these guidelines.

The views expressed in comments published on newindianexpress.com are those of the comment writers alone. They do not represent the views or opinions of newindianexpress.com or its staff, nor do they represent the views or opinions of The New Indian Express Group, or any entity of, or affiliated with, The New Indian Express Group. newindianexpress.com reserves the right to take any or all comments down at any time.

flipboard facebook twitter whatsapp