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Tsunami-Warnung für Spanien: Forscher warnen vor verheerender Monster-Welle
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Tsunami-Forschung: Auf den Spuren der Monsterwellen
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Surprising tsunami triggers may lurk off California’s coast, scientists say By Amina Khan, Los Angeles Times
Published: May 9, 2021, 11:00am
Share: POINT REYES NATIONAL SEASHORE, CA - JULY 20, 2016: Clear water and deep blue sky at Tomales Bay on July 20, 2016 in Point Reyes National Seashore, California. (Gina Ferazzi / Los Angeles Times)
LOS ANGELES Although California’s most dangerous tsunamis come from thousands of miles away, scientists say they’ve pinpointed a wave trigger that’s much closer to home. Earthquakes along strike-slip faults can cause potentially dangerous waves in certain contexts, a new model shows and such faults do exist right off parts of the Golden State’s shores.
Credit: Image courtesy of Costas Synolakis
On September 28, 2018, an inexplicably large tsunami devastated the Indonesian coastal city of Palu and several others nearby. Between the tsunami and the magnitude 7.5 earthquake that caused it, some 4,340 people were killed, making it the deadliest earthquake that year.
The tsunami’s waves reached around six meters high, which was a shock to geophysicists who had believed that earthquakes along a strike-slip fault could only trigger far smaller tsunamis for that particular region. Now, new research describes a mechanism for these large tsunamis to form, and suggests that other coastal cities that were thought to be safe from massive tsunamis may need to reevaluate their level of risk.
Surprising tsunami triggers may lurk off California s coast, scientists say Amina Khan © (Gina Ferazzi/Los Angeles Times) The clear water of Marin County s Tomales Bay, whose shape and proximity to the San Andreas fault might make it more vulnerable to tsunamis than scientists previously realized. (Gina Ferazzi/Los Angeles Times)
Although California’s most dangerous tsunamis come from thousands of miles away, scientists say they’ve pinpointed a wave trigger that’s much closer to home. Earthquakes along strike-slip faults can cause potentially dangerous waves in certain contexts, a new model shows and such faults do exist right off parts of the Golden State’s shores.
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