Short Wave Discovering 'Stormquakes'
Feb 5, 2020
Seismologist Wenyuan Fan uncovers the fascinating phenomenon of 'stormquakes,' seismic events triggered by powerful ocean storms. These minor earthquakes reveal seasonal patterns and the complex interplay between weather and seismic activity. The discussion highlights how ocean wave dynamics and seafloor features contribute to these occurrences. As researchers delve deeper into stormquakes, they could uncover previously hidden geological structures, enhancing our understanding of the Earth's subsurface.
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Accidental Discovery of Stormquakes
- Wenyuan Fan, a seismologist, discovered unusual seismic activity while studying a 2012 earthquake in Haida Gwaii.
- Initially thought to be earthquake precursors, the activity's recurrence every winter suggested a different cause.
Seasonality Clue
- Earthquakes are not seasonal, but the wintertime recurrence of the seismic activity pointed towards a link with weather.
- This 'eureka moment' led to the discovery that storms cause 'stormquakes'.
Waves and Stormquakes
- Stormquakes are caused by the interaction of strong ocean waves with specific seafloor topographies.
- This correlation was confirmed by cross-examining ocean wave data and seismic activity records.
