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1835 Concepción earthquake : ウィキペディア英語版 | 1835 Concepción earthquake
The 1835 Concepción earthquake occurred near the neighboring cities of Concepción and Talcahuano in Chile on February 20 at 11:30 local time (15:30 UTC) and has an estimated magnitude of 8.2 Mfa〔 or 8.1 Ml. The earthquake triggered a tsunami which caused the destruction of Talcahuano. A total of at least 50 people died from the effects of the earthquake and the tsunami. The earthquake caused damage from San Fernando in the north to Osorno in the south. It was felt over a still wider area from Copiapó in the north to the island of Chiloe in the south and as far west as the Juan Fernández Islands.〔 ==Tectonic setting== Chile lies above the convergent boundary between the Nazca Plate and the South American Plate, with a convergence rate of 66 mm/yr. This boundary has been the site of many historical megathrust earthquakes, including the largest earthquake ever recorded. The rupture area of the 1835 earthquake was noted as a prominent seismic gap, leading to a forecast of a large earthquake (Mw 8.0–8.5) within a few decades. The recent 2010 Chile earthquake appears to have ruptured this part of the plate interface.
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