School Seismology Dave Waltham Department of Earth Sciences Royal Holloway University of London.

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Presentation transcript:

School Seismology Dave Waltham Department of Earth Sciences Royal Holloway University of London

Japan, March 11, 2011

RHUL Recording

P-waves, S-Waves & Mexican Waves

Surface Waves

RHUL Recording PSSurface Waves ~10 mins 05:56:37

:10. Hence, earthquake at 05:56:37 – 00:10:10 = 05:46:27

Epicentral Distance RHUL Japan

With Plate Boundaries

Texas Epicentral Distance=90°

Conclusions Off-shore Japan Occurred at 05:46:27 Large!

Large Foreshock Wednesday 9/3/11 Friday 11/3/11

Aftershocks

Earthquake Seismology RHUL’s Seismometer Greece 14 Feb 2008 Magnitude 6.7 With aftershock China 12 May 2008 Magnitude fatalities Herefordshire 26 Oct 2008 Magnitude 3.6

Frequencies 1 Hz 0.1 Hz

Conclusions School equipment can be used to detect and characterize distant earthquakes. We don’t know how to predict earthquakes. Can the next generation of scientists find a way? Until then, rigorous building codes save lives.