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Weak mag. 2.3 earthquake - Tasman Sea, 32 km southeast of Blenheim, Marlborough District, New Zealand, on Monday, Mar 20, 2023 at 6:48 pm (GMT +13) -

Weak magnitude 2.3 earthquake at 5 km depth

20 Mar 05:49 UTC: First to report: GEONET (NZ) after 55 seconds.
20 Mar 05:50: Magnitude recalculated from 2.1 to 2.3. Hypocenter depth recalculated from 14.8 to 13.2 km (from 9.2 to 8.2 mi). Epicenter location corrected by 1.6 km (1 mi) towards NE.
20 Mar 05:51: Hypocenter depth recalculated from 13.2 to 9.1 km (from 8.2 to 5.7 mi). Epicenter location corrected by 2.4 km (1.5 mi) towards NNW.
20 Mar 05:58: Hypocenter depth recalculated from 9.1 to 5.0 km (from 5.7 to 3.1 mi). Epicenter location corrected by 1.1 km (0.7 mi) towards ESE.

Earthquake details

Date & time	Mar 20, 2023 05:48:09 UTC -
Local time at epicenter	Monday, Mar 20, 2023 at 6:48 pm (GMT +13)
Status	Confirmed
Magnitude	2.3
Depth	5.0 km
Epicenter latitude / longitude	41.65063°S / 174.28812°E (Tasman Sea, New Zealand)
Antipode	41.651°N / 5.712°W
Shaking intensity	Weak shaking near epicenter
Felt	0 reports
Primary data source	GEONET (NZ) (Earthquake Commission and Geological Survey, New Zealand)
Nearest volcano	###NEARESTVOLCANO2###
Nearby towns and cities	17 km (11 mi) E of Seddon (pop: 511) \| Show on map \| Quakes nearby 32 km (20 mi) ESE of Blenheim (pop: 26,600) \| Show on map \| Quakes nearby 56 km (35 mi) SW of Karori (pop: 15,700) \| Show on map \| Quakes nearby 57 km (36 mi) SW of Wellington (pop: 381,900) \| Show on map \| Quakes nearby 70 km (43 mi) SW of Wainuiomata (pop: 19,400) \| Show on map \| Quakes nearby 71 km (44 mi) SW of Lower Hutt (pop: 101,200) \| Show on map \| Quakes nearby 74 km (46 mi) SW of Porirua (pop: 50,900) \| Show on map \| Quakes nearby 94 km (58 mi) ESE of Nelson (pop: 59,200) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Broken Clouds 20.3°C (69 F), humidity: 76%, wind: 14 m/s (27 kts) from N
Estimated seismic energy released	1.8 x 10⁸ joules (49.4 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
2.3	5 km	New Zealand	GEONET (NZ)
2.3	5 km	Cook Strait, New Zealand	RaspberryShake

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User reports for this quake

At magnitude 2.3, such a quake wouldn't normally be felt by people except under very favorable conditions.

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

There are no user reports for this quake.

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