Moderate mag. 4.6 earthquake - 94 km northeast of Nan, Thailand, on Sunday, Oct 31, 2021 10:04 am (GMT +7) -

Moderate mag. 4.6 earthquake - 94 km northeast of Nan, Thailand, on Sunday, Oct 31, 2021 10:04 am (GMT +7)

Moderate magnitude 4.6 earthquake at 20 km depth

31 Oct 03:14 UTC: First to report: VolcanoDiscovery after 10 minutes.
31 Oct 03:17: Now using data updates from EMSC
31 Oct 03:33: Magnitude recalculated from 4.9 to 4.6. Hypocenter depth recalculated from 1.0 to 10.0 km (from 0.6 to 6.2 mi). Epicenter location corrected by 9.5 km (5.9 mi) towards W.
31 Oct 07:48: Hypocenter depth recalculated from 10.0 to 20.0 km (from 6.2 to 12.4 mi). Epicenter location corrected by 6.9 km (4.3 mi) towards SW.
Update Sun, 31 Oct 2021, 03:21
Magnitude 4.9 earthquake strikes near Luang Prabang, Luang Prabang Province, Laos
4.9 quake 31 Oct 10:04 am (GMT +7)
4.9 quake 31 Oct 10:04 am (GMT +7)
An earthquake of magnitude 4.9 occurred only 16 minutes ago 89 km southwest of Luang Prabang, Thailand, the European-Mediterranean Seismological Centre (EMSC) reported.
The quake hit at a very shallow depth of 1 km beneath the epicenter near Luang Prabang, Luang Prabang Province, Laos, in the morning on Sunday, October 31st, 2021, at 10:04 am local time. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Sainyabuli (pop. 13,500) located 48 km from the epicenter, Chiang Klang (pop. 13,200) 60 km away, Luang Prabang (pop. 47,400) 89 km away, and Nan (pop. 24,700) 105 km away.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Earthquake data

Date & time: Oct 31, 2021 03:04:56 UTC -
Local time at epicenter: Sunday, Oct 31, 2021 10:04 am (GMT +7)
Magnitude: 4.6
Depth: 20.0 km
Epicenter latitude / longitude: 19.51°N / 101.23°E (Nan, Thailand)
Antipode: 19.51°S / 78.77°W
Nearby towns and cities:
46 km (28 mi) ENE of Chiang Klang (pop: 13,200) --> See nearby quakes!
94 km (58 mi) NNE of Nan (pop: 24,700) --> See nearby quakes!
98 km (61 mi) E of Chiang Kham (Phayao) (pop: 14,100) --> See nearby quakes!
135 km (84 mi) ENE of Dok Kham Tai (Phayao) (pop: 23,800) --> See nearby quakes!
153 km (95 mi) ESE of Chiang Rai (pop: 78,800) --> See nearby quakes!
161 km (100 mi) ESE of Mae Chan (Chiang Rai) (pop: 37,700) --> See nearby quakes!
224 km (139 mi) NW of Vientiane (Vientiane Prefecture, Laos) (pop: 196,700) --> See nearby quakes!
228 km (141 mi) NE of Lampang (pop: 156,100) --> See nearby quakes!
285 km (177 mi) NW of Udon Thani (pop: 247,200) --> See nearby quakes!
645 km (401 mi) N of Bangkok (pop: 5,104,500) --> See nearby quakes!
Weather at epicenter at time of quake:
Broken Clouds 23.9°C (75 F), humidity: 83%, wind: 1 m/s (2 kts) from SE
Primary data source: EMSC (European-Mediterranean Seismological Centre)
Estimated released energy: 5 x 1011 joules (139 megawatt hours, equivalent to 120 tons of TNT) | about seismic energy
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If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
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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.
4.620 kmThailand: LAOSEMSC
4.91 kmLaosTMD
4.610 km52 Km ENE of Chiang Klang, ThailandUSGS
4.610 kmLaosGFZ

User reports for this quake (2)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Vientiane, Laos (227.7 km SE of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s
Vientiane, Laos (227.7 km SE of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s
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