Mag. 4.4 earthquake - Tonga on Thursday, 21 August 2003 at 17:29 (GMT)
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Light magnitude 4.4 earthquake at 33 km depth
Depth: 33.0 km
Epicenter latitude / longitude: 20.833°S / 175.511°W (Tonga)
Nearest volcano: Unnamed 20.85°S/175.53°W (3 km / 2 mi)
Nearby towns and cities:
47 km (29 mi) NW of Nuku'alofa (pop: 22,400) --> See nearby quakes!
47 km (29 mi) NW of Nuku‘alofa (pop: 22,400) --> See nearby quakes!
57 km (35 mi) NW of Kolonga (pop: 1,100) --> See nearby quakes!
81 km (50 mi) NW of ‘Ohonua (Ohonua) (pop: 1,240) --> See nearby quakes!
165 km (103 mi) SW of Pangai (pop: 1,740) --> See nearby quakes!
291 km (181 mi) SSW of Neiafu (pop: 4,320) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.5 x 1011 joules (69.8 megawatt hours, equivalent to 60 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 4.4||33 km||Tonga||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.