M 4.6 in Thailand on 31 Oct 2021 03:04 UTC

Hazard models

EQ parameters
Shakemap
Tsunami

Event summary

This earthquake is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

Earthquake Magnitude: 4.6M
Depth: 10 Km
Lat/Lon: 19.5474 , 101.2802
Event Date: 31 Oct 2021 03:04 UTC
31 Oct 2021 10:04 Local
Exposed Population:
1000 thousand in 100km
Source: NEIC us7000fq7h
Inserted at: 31 Oct 2021 03:33 UTC
INFORM Coping capacity of the alert score
6.2 (Laos)
INFORM Coping capacity of the affected contries: Laos= 6.2; Thailand= 4.1

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0 0
us7000fq7h Scaled population (vector) 6  
  C1 earthquake 1  
  C2 earthquake 0  
  Country Vulnerability 0  
  INFORM_normalised 1.13  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1405905 0 31 Oct 2021 03:04 4.6M, 10km N/A 1000 thousand (in 100km) 00:29 NEIC
The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.
The episode that has the last updated information.
* The max MMI detected for sources having shakemaps;
** The population detected in MMI>=7 for episode with shakemap or in a 100km radius;
*** The tsunami max height.

Exposed population

The earthquake happened in Thailand , Province of Nan (population 438,348) . The nearest places are Ban Huai Pun, Ban Pong Makham Yao, Ban Nath Yang, Ban Tasseng, Ban Nangeun, Ban Phalanc, Muang Hôngsa, Ban Dan, Muang Ngeun, Ban Khoun Khan, and Ban A Ham.

Radius Population
100 km 1000000 people
75 km 600000 people
50 km 160000 people
20 km 52000 people
10 km 5700 people
5 km 2300 people
2 km <1000 people

Affected Provinces

Region Province Country Population
Nan Thailand 440000 people
Xaignabouri Laos 210000 people

Affected populated places

Name Region Province Country City class Population Distance
Ban Huai Pun Nan Thailand Village - 1 km
Ban Pong Makham Yao Nan Thailand Village - 14 km
Ban Nath Yang Xaignabouli Laos Village - 14 km
Ban Tasseng Xaignabouli Laos Village - 16 km
Ban Nangeun Xaignabouli Laos Village - 17 km
Ban Phalanc Xaignabouli Laos Village - 17 km
Muang Hôngsa Xaignabouli Laos Village - 18 km
Ban Dan Nan Thailand Village - 18 km
Muang Ngeun Xaignabouli Laos Village - 19 km
Ban Khoun Khan Xaignabouli Laos Village - 20 km
Ban Samet Xaignabouli Laos Village - 21 km
Ban Pheng Ngam Xaignabouli Laos Village - 21 km
Ban Huai Toei Nan Thailand Village - 22 km
Ban Khun Nam Lat Ngae Nan Thailand Village - 26 km
Ban Sôm Sèo Xaignabouli Laos Village - 29 km
Ban Houaykhông Xaignabouli Laos Village - 30 km
Ban Khun Nam Ngaeng Noi Nan Thailand Village - 31 km
Ban Na San Xaignabouli Laos Village - 35 km
Ban Maeo Nam Pang Nan Thailand Village - 38 km
Ban Tanoun Oudomxay Laos Village - 38 km
Ban Pang Khun Nam Pua Nan Thailand Village - 40 km
Ban Pak Ngeun Oudomxay Laos Village - 41 km
Ban Sun Nan Thailand Village - 41 km
Muang Pakbèng Oudomxay Laos Village - 42 km
Muang Xaignabouli Xaignabouli Laos Village - 45 km
Ban Bau Luang Nan Thailand Village - 45 km
Ban Chalaeng Nan Thailand Village - 45 km
Ban Sali Nan Thailand Village - 46 km
Ban Khôk-Èk Xaignabouli Laos Village - 47 km
Ban Nam O Nan Thailand Village - 49 km
Ban Sènlouang Xaignabouli Laos Village - 49 km
Ban Xianglôm Xaignabouli Laos Village - 49 km
Ban Si Udom Nan Thailand Village - 49 km
Ban Na Tak Xaignabouli Laos Village - 50 km
Ban Bouk Xaignabouli Laos Village - 50 km
Ban Pa Yang Xaignabouli Laos Village - 51 km
Ban Ngon Oudomxay Laos Village - 51 km
Ban Pua Nan Thailand Village - 51 km
Ban Khun Wa Nua Yao Nan Thailand Village - 51 km
Ban Chiang Klang Nan Thailand Village - 52 km
Ban Tong Oudomxay Laos Village - 52 km
Ban Na Mao Oudomxay Laos Village - 52 km
Ban Muang Nan Thailand Village - 53 km
Ban Xianghon Xaignabouli Laos Village - 53 km
Ban Thana Xaignabouli Laos Village - 55 km
Ban Lao Nan Thailand Village - 55 km
Sayaboury Xaignabouli Laos Village - 56 km
Ban Khing Xaignabouli Laos Village - 56 km
Muang Phiang Xaignabouli Laos Village - 56 km
Ban Hia Nan Thailand Village - 57 km
Ban Daun Jai Nan Thailand Village - 57 km
Ban Bo Luang Nan Thailand Village - 57 km
Ban Houamiang Xaignabouli Laos Village - 57 km
Ban Tut Nan Thailand Village - 58 km
Ban Houay Ngat Xaignabouli Laos Village - 58 km
Ban Tha Ko Kham Nan Thailand Village - 59 km
Ban Na Kok Nan Thailand Village - 60 km
Ban Houei Sine Xaignabouli Laos Village - 60 km
Muang Thadua Xaignabouli Laos Village - 61 km
Ban Kamu Xaignabouli Laos Village - 61 km
Ban Bun Yun Nan Thailand Village - 61 km
Ban Haiteu Oudomxay Laos Village - 61 km
Ban Souey Louangphabang Laos Village - 61 km
Ban Talan Xaignabouli Laos Village - 63 km
Muang Nane Louangphabang Laos Village - 63 km
Ban Mai Song Khwae Nan Thailand Village - 63 km
Ban Bouam Phay Louangphabang Laos Village - 63 km
Ban Pang Kom Nan Thailand Village - 64 km
Ban Thung Chai Nan Thailand Village - 64 km
Ban Bau Nan Thailand Village - 64 km
Ban Mondon Bokéo Laos Village - 65 km
Ban Huai Dai Nan Thailand Village - 65 km
Ban Khôkka Bokéo Laos Village - 65 km
Muang Houn Oudomxay Laos Village - 66 km
Ban Pakneun Louangphabang Laos Village - 67 km
Ban Kham Bokéo Laos Village - 67 km
Ban Nang Dam Nan Thailand Village - 67 km
Ban Kok Nan Thailand Village - 68 km
Ban Nakhèm Xaignabouli Laos Village - 69 km
Ban Pang Puk Nan Thailand Village - 69 km
Ban A Ham Nan Thailand Village - 69 km

see full list

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Xieng Lom XIE unknown 0 48 km
Sayaboury ZBY 380 Civ. Unpaved No 4200 55 km
Ban Xieng Keo 305 0 93 km
Nan NNT 214 Civ. Paved Yes 6500 97 km

More information

For a full list of available products related to this event, please refer to the GDACS Resources page.