Mag. 4.6 earthquake - Tonga Region on Saturday, 4 April 1981 at 08:44 (GMT)
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Light magnitude 4.6 earthquake at 33 km depth
Depth: 33.0 km
Epicenter latitude / longitude: 17.051°S / 172.275°W (Tonga)
Nearest volcano: Tafahi (204 km / 127 mi)
Nearby towns and cities:
203 km (126 mi) SE of Hihifo (pop: 815) --> See nearby quakes!
254 km (158 mi) NE of Neiafu (pop: 4,320) --> See nearby quakes!
345 km (214 mi) SSW of Tāfuna (Tualauta, American Samoa) (pop: 11,000) --> See nearby quakes!
351 km (218 mi) SSW of Pago Pago (Ma'Oputasi, American Samoa) (pop: 11,500) --> See nearby quakes!
359 km (223 mi) S of Mulifanua (Samoa) (pop: 4,510) --> See nearby quakes!
362 km (225 mi) S of Apia (Samoa) (pop: 40,400) --> See nearby quakes!
362 km (225 mi) S of Fasito‘outa (Samoa) (pop: 2,100) --> See nearby quakes!
378 km (235 mi) NE of Pangai (pop: 1,740) --> See nearby quakes!
395 km (245 mi) S of Asau (Samoa) (pop: 6,640) --> See nearby quakes!
549 km (341 mi) NE of Nuku'alofa (pop: 22,400) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 5 x 1011 joules (139 megawatt hours, equivalent to 120 tons of TNT) 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 4.6||33 km||Tonga region||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.