M 4.8 in Indonesia on 20 Oct 2021 09:21 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: 4.8M
Depth: 10 Km
Lat/Lon: -8.2556 , 116.7935
Event Date: 20 Oct 2021 09:21 UTC
20 Oct 2021 17:21 Local
Exposed Population:
3.8 million in 100km
Source: NEIC us6000fw2t
Inserted at: 20 Oct 2021 09:40 UTC
INFORM Coping capacity of the alert score
4.8 (Indonesia)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0 0
us6000fw2t Scaled population (vector) 6.57  
  C1 earthquake 1.54  
  C2 earthquake -0.64  
  Country Vulnerability 0.09  
  INFORM_normalised 0.96  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1403429 0 20 Oct 2021 09:21 4.8M, 10km N/A 3.8 million (in 100km) 00:19 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 Indonesia , Province of Nusa Tenggara Barat (population 3,624,042) . The nearest places are Soengian, Lepeloang, Sembelie, Sambaloen Lawang, Sembaloenboemboeng, Lombok, Bayan, Laboean Mapin, Alas, Pernang, and Matajang.

Radius Population
100 km 3.8 million people
75 km 2 million people
50 km 970000 people
20 km 130000 people
10 km <1000 people
5 km no people
2 km no people

Affected Provinces

Region Province Country Population
Nusa Tenggara Barat Indonesia 3.6 million people

Affected populated places

Name Region Province Country City class Population Distance
Soengian Nusa Tenggara Barat Indonesia Village - 14 km
Lepeloang Nusa Tenggara Barat Indonesia Village - 16 km
Sembelie Nusa Tenggara Barat Indonesia Village - 19 km
Sambaloen Lawang Nusa Tenggara Barat Indonesia Village - 29 km
Sembaloenboemboeng Nusa Tenggara Barat Indonesia Village - 30 km
Lombok Nusa Tenggara Barat Indonesia Village - 32 km
Bayan Nusa Tenggara Barat Indonesia Village - 33 km
Laboean Mapin Nusa Tenggara Barat Indonesia Village - 34 km
Alas Nusa Tenggara Barat Indonesia Village - 37 km
Pernang Nusa Tenggara Barat Indonesia Village - 38 km
Pringgabaja Nusa Tenggara Barat Indonesia Village - 39 km
Desa Anjar Nusa Tenggara Barat Indonesia Village - 39 km
Utan Nusa Tenggara Barat Indonesia Village - 42 km
Tapir Beru Nusa Tenggara Barat Indonesia Village - 43 km
Soerelage Nusa Tenggara Barat Indonesia Village - 47 km
Balli Nusa Tenggara Barat Indonesia Village - 52 km
Taliwang Nusa Tenggara Barat Indonesia Village - 52 km
Masabagik Nusa Tenggara Barat Indonesia Village - 53 km
Pato Pedoe Nusa Tenggara Barat Indonesia Village - 53 km
Salangan Nusa Tenggara Barat Indonesia Village - 54 km
Sangjang Nusa Tenggara Barat Indonesia Village - 55 km
Tallwang Nusa Tenggara Barat Indonesia Village - 55 km
Sakra Nusa Tenggara Barat Indonesia Village - 59 km
Kadok Nusa Tenggara Barat Indonesia Village - 60 km
Moesoek Nusa Tenggara Barat Indonesia Village - 62 km
Poenik Nusa Tenggara Barat Indonesia Village - 62 km
Kopang Nusa Tenggara Barat Indonesia Village - 64 km
Soeroengdjoekoeng Nusa Tenggara Barat Indonesia Village - 67 km
Djareweh Nusa Tenggara Barat Indonesia Village - 67 km
Matajang Nusa Tenggara Barat Indonesia Village - 68 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
Sumbawa Besar 5 Civ. Paved No 4700 73 km
Selaparang AMI 16 Civ. Paved Yes 6800 84 km
Lunyuk LYK unknown 0 91 km

Ports

Name LOCODE Country Distance
Labuhanhaji Indonesia 56 km
Taliwang Indonesia 61 km
Sumbawa IDSWQ Indonesia 72 km
Ampenan IDAMP Indonesia 86 km
Labuantring Bay Indonesia 96 km

More information

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