Foreshocks

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Related to foreshock: tsunami, aftershock

Mini-earthquakes that often precede the largest earthquake in a series

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aftershock

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The present index number 3.0 is the largest compared with 1.7 for the foreshock [44] and 0.5 for the microcracks in the laboratory experiment [11].

Field detection of microcracks to define the nucleation stage of earthquake occurrence

The morning after the initial foreshock, Keranen's team scrambled to install three seismometers around Prague.

Whose fault? Scientists had long suspected frackers caused earthquakes. But when a dead fault unleashed a 5.6 on Oklahoma, it rocked seismology to the core

The foreshock sent people scrambling, and the main shock arrived with such fury that it flattened crowded rooming houses.

Frisco quake remembered

The foreshock proved to be just a preview of the main event Less than 30 seconds later, a moment magnitude 7.9 earthquake struck with an epicenter located just seven miles from the center of San Francisco.

All shook up: if the 1906 San Francisco earthquake occurred today, insured losses would likely reach $80 billion; however, there are many scenarios capable of producing even greater losses

1(a), AEs caused by the fracture of individual asperities exhibit similar characteristics to the sequence for natural earthquakes, including foreshock, mainshock, and aftershock events.

Hierarchical fracture process in brittle rocks by means of high-speed monitoring of AE hypocenter

23 is now believed to have been the foreshock of the stronger earthquake that struck Nov.

TransAlaska Pipeline resumes operation following earthquakes. (Pipeline Construction Outlook)

At almost precisely 5.12am local time, a foreshock happened in the San Francisco Bay area.

QUAKE REMEMBERED

One attention-focusing foreshock of such an upheaval was last year's six-month strike in the commercials industry carried out by SAG-AFTRA, the longest actors' walkout in the history of Hollywood.

Residual Anger : Hollywood unions on the brink

But today's rumble is but a mild foreshock of a tectonic demographic shift, a jolt that British Author Paul Wallace describes as an "agequake."

Ready for the Other Millennium Bomb?

when that first tremor struck, a foreshock through which few in the city slept.

Robert Duncan: the ambassador from Venus

The quake was 11 times stronger than the 6.4-magnitude quake "foreshock" the previous day, according to the United States Geological Survey.

7.1-magnitude quake jolts Southern California

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