Transcribed
EARLY AFTERSHOCKS OF THE TOHOKU-OKI, JAPAN, EARTHQUAKE
Early aftershocks of the 2011 Mw9.0 Tohoku-Oki, Japan earthquake |(A) НТАН.ЕНZ.SAC x10 6. |(B) High-Pass 20 Hz 6.8 6.67.4 7.5| |6.8 6,5 -15 Spectrogram -20 -25 -30 10 -35 -40 500 1000 1500 2000 2500 3000 3500 Time (s), 100 times faster than true speed 4+ 30 20 Amplitude (nm/s) Frequency (Hz)
EARLY AFTERSHOCKS OF THE TOHOKU-OKI, JAPAN, EARTHQUAKE
shared by hfftw on Mar 22
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Large shallow earthquakes are typically followed by a significant increase in seismic activity near the mainshock rupture that is generally termed “aftershock.” The Tohoku-Oki earthquake triggered...
numerous aftershocks that were recorded on scale by many nearby instruments. The resulting sound contains higher pitch than in the previous examples when it was speeded up only 50 times.
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