Advanced modeling uncovers seamounts as the source of Japan’s tsunami earthquakes
A recent study challenges the prevailing hypothesis that subducted seamounts are weakly coupled and slide aseismically, suggesting instead that they act as strong asperities causing significant earthquakes. Through modeling and analysis, researchers have debunked the weak asperity model, providing a new explanation for the source of historical tsunami earthquakes along the southern Japan Trench, including the 1677 M8.3–8.6 Enpo Boso-oki event.