Moderate mag. 4.9 earthquake - South Pacific Ocean, 222 km southwest of Apia, Tuamasaga, Samoa, on Friday, 21 July 1978 at 07:22 (GMT)

Moderate mag. 4.9 earthquake - South Pacific Ocean, 222 km southwest of Apia, Tuamasaga, Samoa, on Friday, 21 July 1978 at 07:22 (GMT)

Séisme modéré magnitude 4.9 at 33 km depth

Date & time: 21 Jul 1978 07:22:36 UTC
Magnitude: 4.9
Profondeur: 33.0 km
Epicenter latitude / longitude: 15.298°S / 173.168°W (South Pacific Ocean, Samoa)
Volcan le plus près: Curacoa (65 km / 40 mi)
Nearby towns and cities:
195 km SSO de Vailoa (pop: 769) --> Voir les séismes à proximité!
204 km SO de Mulifanua (pop: 4,510) --> Voir les séismes à proximité!
206 km SSO de Asau (pop: 6,640) --> Voir les séismes à proximité!
219 km SO de Afega (Malie) (pop: 1,900) --> Voir les séismes à proximité!
221 km SSO de Safotu (pop: 1,210) --> Voir les séismes à proximité!
222 km SO de Apia (pop: 40,400) --> Voir les séismes à proximité!
232 km SO de Lufilufi (pop: 1,070) --> Voir les séismes à proximité!
284 km OSO de Tāfuna (Tualauta, Samoa américaines) (pop: 11,000) --> Voir les séismes à proximité!
288 km OSO de Pago Pago (Ma'Oputasi, Samoa américaines) (pop: 11,500) --> Voir les séismes à proximité!
394 km SE de Mata-Utu (Hahake, Wallis-et-Futuna) (pop: 1,200) --> Voir les séismes à proximité!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.4 x 1012 joules (392 megawatt hours, equivalent to 338 tons of TNT) More info
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
MagnitudeProfondeurLocationSource
M 4.933 kmTonga (Samoa)USGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

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