Strong mag. 5.4 earthquake - South Pacific Ocean, 239 km southwest of Apia, Tuamasaga, Samoa, on Wednesday, 6 September 1978 at 23:26 (GMT)
Quake Data | Interactive map | User Reports | Aftershocks | Earlier quakes in same area| Palauli | Vaisigano | Aiga-i-le-Tai | Gagaifomauga | Tuamasaga | Atua | Eastern District | Uvéa
Strong magnitude 5.4 earthquake at 33 km depth
Date & time: 6 Sep 1978 23:26:23 UTC
Depth: 33.0 km
Epicenter latitude / longitude: 15.361°S / 173.33°W (South Pacific Ocean, Samoa)
Nearest volcano: Curacoa (46 km / 29 mi)
Nearby towns and cities:
210 km (130 mi) SSW of Vailoa (pop: 769) --> See nearby quakes!
218 km (135 mi) SSW of Asau (pop: 6,640) --> See nearby quakes!
220 km (137 mi) SW of Mulifanua (pop: 4,510) --> See nearby quakes!
235 km (146 mi) SSW of Safotu (pop: 1,210) --> See nearby quakes!
236 km (146 mi) SW of Afega (Malie) (pop: 1,900) --> See nearby quakes!
239 km (149 mi) SW of Apia (pop: 40,400) --> See nearby quakes!
249 km (155 mi) SW of Lufilufi (pop: 1,070) --> See nearby quakes!
307 km (191 mi) WSW of Pago Pago (Ma'Oputasi, American Samoa) (pop: 11,500) --> See nearby quakes!
384 km (239 mi) SE of Mata-Utu (Hahake, Wallis & Futuna) (pop: 1,200) --> See nearby quakes!
548 km (340 mi) NW of Alofi (Niue) (pop: 624) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 7.9 x 1012 joules (2.21 gigawatt hours, equivalent to 1898 tons of TNT or 0.1 atomic bombs!) More info
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.
|M 5.4||33 km||Tonga (Samoa)||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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More infoRecorded aftershocks, latest first (2 quakes):
- 22 Sep 1978 14:32 UTC| M 4.7 |47 km (29.2 mi) depth|24 km (15 mi) distance| USGS | Details
- 11 Sep 1978 06:05 UTC| M 4.8 |33 km (20.5 mi) depth|16 km (10 mi) distance| USGS | Details