Two More Reasons to Think About Earthquakes

Two earthquake-related news articles were released over the weekend.

First, a Magnitude 6.7 quake hit northeast India, which, according to the USGS-PAGER report, is likely to have caused hundreds of fatalities and hundreds of millions USD in economic losses.  This is a remote, hilly region.  The nearest major city, Imphal, has about 224,000 residents.  Non-profit GeoHazards International has been working with locals in the nearby city of Aizawl (population ~265,000) to assess likely effects from a M7 earthquake  and to train geologists to map active landslides in the region.

Second, a geologic link has been discovered between two faults in SF-East Bay: Hayward and Rodgers Creek.  This means they could rupture at the same time, causing an earthquake as large as Magnitude 7.3, according to results published by USGS scientist Janet Watt and reported by SFGate.  Such a quake would be ten times more intense than if the Hayward Fault alone ruptured in a Magnitude 6.8.  Why?  The way magnitude scales work, a 1.0 increase in magnitude means a 30x increase in energy released.  So a M7 quake is 30x more intense than a M6.

Do you have the resources you’d need after a major quake near you?