It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
The moderate Alum Rock earthquake, magnitude 5.4, rattled the southern San Francisco Bay in late 2007. For those who experienced it at close quarters, it was a brief, hard jolt. Overall this event was unremarkable – except that one of QuakeFinder's CalMagNet stations, which are spread over California along the San Andreas Fault, was barely 2 km from the epicenter.
A new paper, just published by "Natural Hazards and Earth System Science," describes that three suspected pre-earthquake indicators were recorded by this QuakeFinder station: (i) short bursts of electromagnetic radiation, 10-30 sec long, increasing in number over the last two weeks before the quake, (ii) a 14-hours long episode of intense air ionization on the day before the earthquake, and (iii) a continuous wave of ULF magnetic pulsations, lasting for nearly 1 hour during the time of the most intense air ionization. In addition, satellites picked up enhanced infrared radiation emitted from several areas around the earthquake site. Together these observations make a strong case that they are all related to this earthquake BEFORE it struck.
With observations like these the future for earthquake early warning looks bright. Once the basic physical processes are understood, we can bring to bear many different techniques, both space-bound and on the ground, each capable of providing a different piece of the puzzle.
This paper can be downloaded from:
Researchers at the Carnegie Institution say that they have discovered a method of measuring and monitoring geological fault lines beneath the Earth’s crust—a development that could significantly enhance scientists’ ability to accurately predict earthquakes.
Geologists previously had no means with which to detect and measure the fluctuating strength of faults that are hidden beneath the Earth’s surface. Now, however, researchers from the Carnegie Institution’s Department of Terrestrial Magnetism have teamed up with experts from Rice University and the University of California, Berkeley and have successfully used a hyper-sensitive seismometer to measure barely perceptible changes in earthquake waves moving through the San Andreas Fault zone in California.