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Mag. 2.5 quake - Tasman Sea, 30 km southeast of Blenheim, Marlborough, New Zealand, on Tuesday, Nov 28, 2023, at 12:32 pm (Auckland time) -

A light magnitude 2.5 earthquake occurred under the sea near the coast of  New Zealand around noon of Tuesday, Nov 28, 2023 at 12.32 pm local time (Pacific/Auckland GMT +13). The quake had a very shallow depth of 11.5 km (7 mi) and was not felt (or at least not reported so).

Mag. 2.5 quake - Tasman Sea, 30 km southeast of Blenheim, Marlborough, New Zealand, on Tuesday, Nov 28, 2023, at 12:32 pm (Auckland time) Mag. 2.5 quake - Tasman Sea, 30 km southeast of Blenheim, Marlborough, New Zealand, on Tuesday, Nov 28, 2023, at 12:32 pm (Auckland time)

Weak magnitude 2.5 earthquake at 12 km depth

27 Nov 23:33 UTC: First to report: GEONET (NZ) after 1 minute.
27 Nov 23:34: Hypocenter depth recalculated from 13.7 to 18.4 km (from 8.5 to 11.4 mi). Epicenter location corrected by 2.3 km (1.4 mi) towards SSE.
... [show all] ...
27 Nov 23:49: Hypocenter depth recalculated from 10.5 to 11.5 km (from 6.5 to 7.1 mi). Epicenter location corrected by 1.8 km (1.1 mi) towards NNW.

Earthquake details

Date & timeNov 27, 2023 23:32:00 UTC -
Local time at epicenterTuesday, Nov 28, 2023, at 12:32 pm (Pacific/Auckland GMT +13)
StatusPreliminary (automatic detection)
Magnitude2.5
Depth11.5 km
Epicenter latitude / longitude41.6469°S / 174.2631°E New Zealand
Seismic antipode41.6469°N / 5.737°W
Shaking intensityVery weak shaking
Felt0 reports
Primary data sourceGEONET (NZ) (Earthquake Commission and Geological Survey, New Zealand)
Weather at epicenter at time of quakeLight Rain 21.5°C (71 F), humidity: 77%, wind: 10 m/s (20 kts) from NNW
Estimated seismic energy released3.5 x 108 joules (98.6 kilowatt hours) | about seismic energy
Interactive map
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Nearby places

The closest larger town where the quake might have been felt is Seddon, a town with 511 inhabitants in New Zealand, in 15.1 km (9 mi) distance west of the epicenter. People likely experienced very weak shaking there. In the capital of  New Zealand, Wellington, 59 km (36 mi) away from the epicenter, the earthquake could not be felt.
The following table shows some of the places that might have been affected (or not) by the shaking.
Distance Place Max. shaking intensity(*) Region Country
15 km (9 mi)
W of epicenter
Seddon
(pop: 511)
II: Very weak
Marlborough District, Marlborough
30 km (18 mi)
NW of epicenter
Blenheim
(pop: 26,600)
I: Not felt
Marlborough District, Marlborough
39 km (24 mi)
NW of epicenter
Renwick
(pop: 2,620)
I: Not felt
Marlborough District, Marlborough
45 km (28 mi)
NW of epicenter
Picton
(pop: 4,800)
I: Not felt
Marlborough District, Marlborough
57 km (35 mi)
NE of epicenter
Karori
(pop: 15,400)
I: Not felt
Wellington City, Wellington
58 km (36 mi)
NW of epicenter
Havelock
(pop: 504)
I: Not felt
Marlborough District, Marlborough
59 km (36 mi)
NE of epicenter
Wellington
(pop: 381,900)
I: Not felt
Wellington
61 km (38 mi)
W of epicenter
Wairau Valley
(pop: 2,150)
I: Not felt
Marlborough District, Marlborough
71 km (44 mi)
NE of epicenter
Wainuiomata
(pop: 19,400)
I: Not felt
Lower Hutt City, Wellington
73 km (45 mi)
NE of epicenter
Lower Hutt
(pop: 101,200)
I: Not felt
Wellington
75 km (47 mi)
NE of epicenter
Porirua
(pop: 50,900)
I: Not felt
Wellington
87 km (54 mi)
NE of epicenter
Pukerua Bay
(pop: 2,120)
: Not felt
Porirua City, Wellington
87 km (54 mi)
NE of epicenter
Upper Hutt
(pop: 38,400)
: Not felt
Wellington
92 km (57 mi)
NW of epicenter
Nelson
(pop: 54,700)
: Not felt
Nelson
93 km (58 mi)
W of epicenter
Stoke
(pop: 19,800)
: Not felt
Nelson City, Nelson
96 km (60 mi)
W of epicenter
Richmond
(pop: 14,000)
: Not felt
Tasman District, Tasman
98 km (61 mi)
SW of epicenter
Kaikoura
(pop: 685)
: Not felt
Canterbury
103 km (64 mi)
NE of epicenter
Paraparaumu
(pop: 30,600)
: Not felt
Kapiti Coast District, Wellington
105 km (65 mi)
W of epicenter
Wakefield
(pop: 2,610)
: Not felt
Tasman District, Tasman
107 km (66 mi)
NW of epicenter
Mapua
(pop: 1,820)
: Not felt
Tasman District, Tasman
107 km (67 mi)
E of epicenter
Waipawa
(pop: 1,900)
: Not felt
South Wairarapa District, Wellington
108 km (67 mi)
NE of epicenter
Waikanae
(pop: 13,900)
: Not felt
Kapiti Coast District, Wellington
119 km (74 mi)
NW of epicenter
Motueka
(pop: 7,490)
: Not felt
Tasman District, Tasman
124 km (77 mi)
W of epicenter
Tapawera
(pop: 330)
: Not felt
Tasman District, Tasman
124 km (77 mi)
NE of epicenter
Otaki
(pop: 6,090)
: Not felt
Kapiti Coast District, Wellington
127 km (79 mi)
NE of epicenter
Carterton
(pop: 10,300)
: Not felt
Wellington
128 km (79 mi)
NW of epicenter
Marahau
(pop: 231)
: Not felt
Nelson
132 km (82 mi)
NE of epicenter
Gladstone
(pop: 940)
: Not felt
Carterton District, Wellington
139 km (87 mi)
NE of epicenter
Masterton
(pop: 28,200)
: Not felt
Wellington
141 km (88 mi)
NE of epicenter
Levin
(pop: 19,800)
: Not felt
Horowhenua District, Manawatu-Wanganui
148 km (92 mi)
NE of epicenter
Kopuaranga
(pop: 1,020)
: Not felt
Masterton, Wellington
150 km (93 mi)
SW of epicenter
Waiau
(pop: 255)
: Not felt
Hurunui District, Canterbury
151 km (94 mi)
NW of epicenter
Takaka
(pop: 1,400)
: Not felt
Tasman District, Tasman
154 km (95 mi)
SW of epicenter
Hanmer Springs
(pop: 1,120)
: Not felt
Hurunui District, Canterbury
154 km (96 mi)
SW of epicenter
Cheviot
(pop: 425)
: Not felt
Hurunui District, Canterbury
156 km (97 mi)
NE of epicenter
Foxton
(pop: 4,780)
: Not felt
Horowhenua District, Manawatu-Wanganui
167 km (104 mi)
NE of epicenter
Tokomaru
(pop: 563)
: Not felt
Horowhenua District, Manawatu-Wanganui
170 km (106 mi)
SW of epicenter
Culverden
(pop: 351)
: Not felt
Hurunui District, Canterbury
183 km (114 mi)
NE of epicenter
Palmerston North
(pop: 76,000)
: Not felt
Manawatu-Wanganui
187 km (116 mi)
NE of epicenter
Pahiatua
(pop: 2,810)
: Not felt
Manawatu-Wanganui
Notes:
(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.

User-reports for this quake

There are no user reports for this quake yet.
At magnitude 2.5, this quake might have been felt very close to the epicenter and under calm conditions.
If you felt it, be the first to report it!
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.

Compare Quake Data

Data for the same earthquake as reported by different agencies

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 Time GMT
2023-11-27
Epicenter Agency
2.5 12 km
7.1 mi
23:32:00 New Zealand GEONET (NZ) (Earthquake Commission and Geological Survey, New Zealand)

Seismograms

Seismic station: South Karori, New Zealand (SNZO/IU network) | Distance from quake: 53 km / 33 mi | Show on map | Station Info
Seismic station South Karori, New Zealand: 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: 0.5-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
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Earthquake statistics

Average number of earthquakes

Based on data from the past 10 years and our earthquake archive back to 1900, there are about 32,000 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):
  • Mag. 6 or higher: 0.1 quakes per year (or 1 quake every 10 years)
  • Mag. 5 or higher: 4.2 quakes per year
  • Mag. 4 or higher: 50 quakes per year
  • Mag. 3 or higher: 342 quakes per year (or 28.5 quakes per month)
  • Mag. 2 or higher: 2,000 quakes per year (or 5.5 quakes per day)
  • Mag. 1 or higher: 3,200 quakes per year (or 8.7 quakes per day)
The area where this quake occurred has a very high level of seismic activity. It has had at least 13 quakes above magnitude 6 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 5 to 10 years.

Number of quakes per year

Previous quakes in the same area of this earthquake

Map of earlier quakes in the area of this quake

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Map to embed or share

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