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Minor mag. 1.8 earthquake - Tasman Sea, 31 km south of Whanganui, New Zealand, on Wednesday, Mar 22, 2023 at 1:46 am (GMT +13) -

Minor magnitude 1.8 earthquake at 12 km depth

21 Mar 12:56 UTC: First to report: RaspberryShake after 10 minutes.
21 Mar 13:00: Hypocenter depth recalculated from 0.8 to 12.0 km (from 0.5 to 7.5 mi). Epicenter location corrected by 4 km (2.5 mi) towards SE.

Earthquake details

Date & time	Mar 21, 2023 12:46:16 UTC -
Local time at epicenter	Wednesday, Mar 22, 2023 at 1:46 am (GMT +13)
Status	Confirmed
Magnitude	1.8
Depth	12.0 km
Epicenter latitude / longitude	40.207°S / 174.997°E (Tasman Sea, New Zealand)
Antipode	40.207°N / 5.003°W
Shaking intensity	Not felt
Felt
Primary data source	RaspberryShake (RaspberryShake)
Nearest volcano	Ruapehu (114 km / 71 mi)
Nearby towns and cities	24 km (15 mi) WNW of Tangimoana (pop: 303) \| Show on map \| Quakes nearby 31 km (19 mi) S of Whanganui (pop: 40,300) \| Show on map \| Quakes nearby 33 km (21 mi) W of Bulls (pop: 1,780) \| Show on map \| Quakes nearby 35 km (21 mi) NW of Foxton Beach (pop: 2,150) \| Show on map \| Quakes nearby 53 km (33 mi) NNW of Levin (pop: 19,800) \| Show on map \| Quakes nearby 55 km (34 mi) WNW of Palmerston North (pop: 76,000) \| Show on map \| Quakes nearby 79 km (49 mi) N of Paraparaumu (pop: 30,600) \| Show on map \| Quakes nearby 122 km (76 mi) N of Wellington (pop: 381,900) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Overcast Clouds 11.5°C (53 F), humidity: 79%, wind: 11 m/s (22 kts) from S
Estimated seismic energy released	3.2 x 10⁷ joules (8.78 kilowatt hours) \| 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
1.8	12 km	Cook Strait, New Zealand	RaspberryShake

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User reports for this quake

At magnitude 1.8, such a quake wouldn't normally be felt by people, but could be recorded instrumentally.

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