a division of Zoltech Corporation

VolksMeter II

Seismometer/Tiltmeter

Indonesia 8.4M eq

12-Sep-07 11:10 UTC

The record in the middle of the display is the 8.4 Mag quake that struck off Sumatra, Indonesia on 12-Sep-07 at 11:10:26 UTC.
Note that the waves took 20 minutes to reach the sensor in Van Nuys, CA.  The activity at the bottom of the display is a 7.8 Mag
aftershock that took place at 23:49:01 UTC, again requiring about 20 minutes to reach the Van Nuys, CA instrument.
This Helicord record shows 24 hours of data.

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