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Strong mag. 6.2 earthquake - Tonga Islands (Samoa) on Saturday, 18 July 2020 - information

Strong mag. 6.2 earthquake - South Pacific Ocean, 238 km southwest of Apia, Tuamasaga, Samoa, on Saturday, July 18, 2020 at 15:32 GMT

Strong mag. 6.2 earthquake - South Pacific Ocean, 238 km southwest of Apia, Tuamasaga, Samoa, on Saturday, July 18, 2020 at 15:32 GMT Strong mag. 6.2 earthquake - South Pacific Ocean, 238 km southwest of Apia, Tuamasaga, Samoa, on Saturday, July 18, 2020 at 15:32 GMT

Strong magnitude 6.2 earthquake at 34 km depth

18 Jul 15:42 UTC: First to report: GFZ after 9 minutes.
Jul 18 15:44: Magnitude recalculated from 5.8 to 5.9.
Jul 18 15:46: Magnitude recalculated from 5.9 to 6.0.
Jul 18 15:53: Magnitude recalculated from 6.0 to 6.1.
Hypocenter depth recalculated from 10.0 to 34.0 km.
Jul 18 16:44: Magnitude recalculated from 6.1 to 6.2.

Earthquake details

Date & timeJul 18, 2020 15:32:42 UTC
Local time at epicenter
StatusConfirmed
Magnitude6.2
Depth34.0 km
Epicenter latitude / longitude15.54°S / 173.1°W (South Pacific Ocean, Samoa)
Antipode15.54°N / 6.9°E
Shaking intensityStrong shaking near epicenter
Felt4 reports
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearest volcanoCuracoa (81 km / 50 mi)
Nearby towns and cities216 km (134 mi) SSW of Vailoa (pop: 769) | Show on map | Quakes nearby
222 km (138 mi) SSW of Mulifanua (pop: 4,510) | Show on map | Quakes nearby
230 km (143 mi) SSW of Asau (pop: 6,640) | Show on map | Quakes nearby
236 km (146 mi) SW of Afega (Malie) (pop: 1,900) | Show on map | Quakes nearby
238 km (148 mi) SW of Apia (pop: 40,400) | Show on map | Quakes nearby
244 km (152 mi) SSW of Safotu (pop: 1,210) | Show on map | Quakes nearby
246 km (153 mi) SW of Lufilufi (pop: 1,070) | Show on map | Quakes nearby
293 km (182 mi) WSW of Pago Pago (Ma'Oputasi, American Samoa) (pop: 11,500) | Show on map | Quakes nearby
416 km (258 mi) SE of Mata-Utu (Hahake, Wallis & Futuna) (pop: 1,200) | Show on map | Quakes nearby
517 km (321 mi) NW of Alofi (Niue) (pop: 624) | Show on map | Quakes nearby
418 km (260 mi) SE of Wallis Island (pop: 10,000) | Show on map | Quakes nearby
Estimated seismic energy released1.3 x 1014 joules (35 gigawatt hours, equivalent to 30089 tons of TNT or 1.9 atomic bombs!) | about seismic energy
Show interactive Map
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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.DepthLocationSource
6.234 kmTonga Islands (Samoa)GFZ
6.210 kmTonga (Samoa)EMSC
6.114 km144 km ENE of Hihifo, Tonga (Samoa)USGS
6.158 kmTonga Islands (Samoa)GeoAu
6.320 kmTonga [Sea] (Samoa)INGV
5.6171 kmTonga Islands (Samoa)BMKG

Seismograms

Seismic station: Funafuti, Tuvalu (FUNA/IU network) | Distance from quake: 1144 km / 711 mi | Show on map | Station Info
Seismic station Funafuti, Tuvalu: 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. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (5)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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unspecified (8361.8 km NE of epicenter) [Map] / not felt
Barstow / Violent shaking (MMI IX)
Apia, Samoa / Weak shaking (MMI III) : I felt it. To me it wasn't strong  
Viti / Violent shaking (MMI IX) : Many many suffering  
Salt lake city, 84104 / Very weak shaking (MMI II)

Aftershocks

[More info]

Recorded aftershocks, latest first (17 quakes)

Date and timeMag
Depth
LocationDetails
Dec 15, 2020 05:06
1 year 51 weeks ago
5.1

10 km
South Pacific Ocean, 233 km SW of Apia, Tuamasaga, SamoaMore
Dec 13, 2020 14:44
1 year 51 weeks ago
4.9

8.6 km
South Pacific Ocean, 220 km SW of Apia, Tuamasaga, SamoaMore
Dec 2, 2020 09:40
2 years ago
5.0

36 km
South Pacific Ocean, 214 km SW of Apia, Tuamasaga, SamoaMore
Nov 29, 2020 16:58
2 years ago
4.7

7.7 km
South Pacific Ocean, 232 km SW of Apia, Tuamasaga, SamoaMore
Nov 16, 2020 07:51
2 years ago
4.6

110 km
South Pacific Ocean, 17 km NE of Hihifo, Niuas, TongaMore
Oct 25, 2020 11:47
2 years ago
5.9

42 km
South Pacific Ocean, 255 km SW of Apia, Tuamasaga, SamoaMore
Oct 18, 2020 02:33
2 years ago
4.6

64 km
South Pacific Ocean, 69 km N of Hihifo, Niuas, TongaMore
Sep 14, 2020 19:53
2 years ago
4.7

10 km
South Pacific Ocean, 202 km SW of Apia, Tuamasaga, SamoaMore
Sep 8, 2020 08:28
2 years ago
5.4

10 km
South Pacific Ocean, 234 km SW of Apia, Tuamasaga, SamoaMore
Aug 30, 2020 10:52
2 years ago
4.7

10 km
South Pacific Ocean, 232 km SW of Apia, Tuamasaga, SamoaMore
Aug 25, 2020 00:08
2 years ago
4.5

10 km
South Pacific Ocean, 70 km E of Hihifo, Niuas, TongaMore
Aug 15, 2020 04:58
2 years ago
4.8

10 km
South Pacific Ocean, 209 km SW of Apia, Tuamasaga, SamoaMore
Aug 15, 2020 04:58
2 years ago
4.8

10 km
South Pacific Ocean, 209 km SW of Apia, Tuamasaga, SamoaMore
Aug 14, 2020 11:50
2 years ago
5.0

104 km
South Pacific Ocean, 265 km SW of Apia, Tuamasaga, SamoaMore
Aug 1, 2020 08:37
2 years ago
4.6

10 km
South Pacific Ocean, 209 km SW of Apia, Tuamasaga, SamoaMore
Jul 22, 2020 17:50
2 years ago
4.6

9.2 km
South Pacific Ocean, 209 km SW of Apia, Tuamasaga, SamoaMore
Jul 21, 2020 14:43
2 years ago
4.6

10 km
South Pacific Ocean, 288 km SW of Apia, Tuamasaga, SamoaMore

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