1980 Azores Islands earthquake

Striking the Autonomous Region of Azores on 1 January, the 1980 Azores Island earthquake killed 73 people and injured over 400, causing severe damage on the islands of Terceira and São Jorge. Measuring 6.9 on the moment magnitude scale, it also shook the islands of Pico and Faial, and resulted from a strike slip fracture, typical of other historical Azorean earthquakes.

1980 Azores Islands
Terceira
Graciosa
São Jorge
UTC time1980-01-01 16:42:42
ISC event652123
USGS-ANSSComCat
Local date1 January 1980 (1980-01-01)
Local time15:42:42
Magnitude6.9 Mw(ISC-GEM)
Depth10 kilometres (6 mi)
Epicenter50 km West of Angra do Heroísmo
38.81°N 27.78°W / 38.81; -27.78
TypeStrike-slip
Areas affectedPortugal
Azores
Max. intensityMMI VIII (Severe)MMI IX (Violent)
TsunamiA small tsunami was registered in Angra do Heroismo
Casualties73 dead, 400 injured

In response to the earthquake, Portuguese president António Ramalho Eanes announced three days of national mourning, while relief efforts, initiated by agents of the local Air Force, were soon accompanied by government-supported agencies.

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