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Moderate mag. 4.9 earthquake - South Pacific Ocean, 191 km northeast of Nukalofa, Nuku'alofa, Tongatapu, on Wednesday, Dec 7, 2022 at 9:58 am (GMT +13) -

$Moderate mag. 4.9 earthquake - South Pacific Ocean, 191 km northeast of Nukalofa, Nuku\'alofa, Tongatapu, on Wednesday, Dec 7, 2022 at 9:58 am (GMT +13)$ $Moderate mag. 4.9 earthquake - South Pacific Ocean, 191 km northeast of Nukalofa, Nuku\'alofa, Tongatapu, on Wednesday, Dec 7, 2022 at 9:58 am (GMT +13)$

Moderate magnitude 4.9 earthquake at 10 km depth

6 Dec 23:22 UTC: First to report: USGS after 2 hours and 23 minutes.
7 Dec 15:02: Epicenter location corrected by 34 km (21 mi) towards NW.

Earthquake details

Date & time	Dec 6, 2022 20:58:36 UTC -
Local time at epicenter	Wednesday, Dec 7, 2022 at 9:58 am (GMT +13)
Status	Confirmed
Magnitude	4.9
Depth	10.0 km
Epicenter latitude / longitude	20.3468°S / 173.5764°W (South Pacific Ocean, Tonga)
Antipode	20.347°N / 6.424°E
Shaking intensity	Moderate shaking near epicenter
Felt	0 reports
Primary data source	USGS (United States Geological Survey)
Nearest volcano	Tofua (170 km / 106 mi)
Nearby towns and cities	101 km (62 mi) SE of Bangai (Pangai) (pop: 1,740) \| Show on map \| Quakes nearby 178 km (111 mi) ENE of Kolonga (pop: 1,100) \| Show on map \| Quakes nearby 180 km (112 mi) NE of ‘Ohonua (Ohonua) (pop: 1,240) \| Show on map \| Quakes nearby 191 km (118 mi) ENE of Nukalofa (Nuku'alofa) (pop: 22,400) \| Show on map \| Quakes nearby 191 km (118 mi) ENE of Nuku‘alofa (pop: 22,400) \| Show on map \| Quakes nearby 193 km (120 mi) SSE of Neiafu (pop: 4,320) \| Show on map \| Quakes nearby 409 km (254 mi) WSW of Alofi (Niue) (pop: 624) \| Show on map \| Quakes nearby 413 km (257 mi) WSW of Hakupu (Niue) (pop: 221) \| Show on map \| Quakes nearby 191 km (119 mi) ENE of Amsterdam Island (pop: 75,000) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake
Estimated seismic energy released	1.4 x 10¹² joules (392 megawatt hours, equivalent to 338 tons of TNT) \| about seismic energy

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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.

Mag.	Depth	Location	Source
4.9	44 km	Tonga Islands	GFZ
4.9	10 km	TONGA	EMSC
4.9	10 km	Tonga Islands	RaspberryShake
4.9	10 km	100 Km SE of Pangai, Tonga	USGS

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Seismograms

Seismic station: Folaha (Nukuhetulu) (TNG1/YC network) | Distance from quake: 192 km / 120 mi | Show on map | Station Info

Seismic station Folaha (Nukuhetulu): vertical movement plot around time of quake (source: IRIS/BUD)

Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.2-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

There are no user reports for this quake.

Earlier earthquakes in the same area

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