Underground at UC Berkeley, seismic sensors capture the deep rumbles from Bay Area earthquakes. Here's what a 4.4-magnitude earthquake that shook the Bay Area last year on Jan. 4, 2018 sounded like. Geophysicist Peggy Hellweg from the UC Berkeley Seismological Lab explains what we're hearing when an earthquake happens.

Listen and read the transcript on UC Berkeley News: http://news.berkeley.edu/2018/01/16/podcast-science-of-cannabis-lecture-series-uc-botanical-garden/

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