A major earthquake in Mexico. Hypocenter location:
DATE TIME SOURCE MAG LAT LON DEPTH DESCRIPTION 1999/09/30 16:31:13.0 SPYDERŪ 7.5 16.15 -96.71 33.00 OAXACA, MEXICO

Waveforms from our own basement, from the broad-band seismic sensor operated there by Weston Observatory. Traces start at the 16:36:00 (GMT) on 1999/09/30, with time marked in seconds, and are arranged in the following order: E-W, N-S, V.
Window scaling. Filtered below 2 seconds

Body waves:

Surface waves: