M 4.9 in Indonesia on 31 Jul 2018 20:28 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: 4.9M
Depth: 62.59 Km
Lat/Lon: -1.8712 , 100.2824
Event Date: 31 Jul 2018 20:28 UTC
01 Aug 2018 03:28 Local
Exposed Population:
420000 people within 100km
Source: NEIC us2000giip
Inserted at: 31 Jul 2018 20:51 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
us2000giip Scaled population (vector) 5.11  
  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
1222163 0 31 Jul 2018 20:28 4.9M, 62.59km N/A 430 thousand (in 100km) 00:22 NEIC
1222265 0 31 Jul 2018 20:28 4.9M, 57.5km N/A 1.4 million (in 100km) 20:33 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 Sumatera Barat (population 4,301,938) . The nearest places are Kambang, Sirantih, Pasartaluk, Sikabur, Limaumanis, Kajoesabatang, Pasarkuok, Kotabaroe, Kotatinggi, Paritpandjang, and Ganting.

Radius Population
100 km 430000 people
75 km 210000 people
50 km 2000 people
20 km no people
10 km no people
5 km no people
2 km no people

Affected Provinces

Region Province Country Population
Sumatera Barat Indonesia 4.3 million people
Jambi Indonesia 2.2 million people
Bengkulu Indonesia 1.3 million people
Riau Indonesia 3.5 million people
Sumatera Selatan Indonesia 6.6 million people
Sumatera Utara Indonesia 9.3 million people
Johor Malaysia 2.3 million people
Melaka Malaysia 640000 people

Affected populated places

Name Region Province Country City class Population Distance
Kambang Sumatera Barat Indonesia Village - 51 km
Sirantih Sumatera Barat Indonesia Village - 52 km
Pasartaluk Sumatera Barat Indonesia Village - 54 km
Sikabur Sumatera Barat Indonesia Village - 55 km
Limaumanis Sumatera Barat Indonesia Village - 55 km
Kajoesabatang Sumatera Barat Indonesia Village - 56 km
Pasarkuok Sumatera Barat Indonesia Village - 61 km
Kotabaroe Sumatera Barat Indonesia Village - 62 km
Kotatinggi Sumatera Barat Indonesia Village - 64 km
Paritpandjang Sumatera Barat Indonesia Village - 64 km
Painan Sumatera Barat Indonesia Village - 66 km
Airhadji Sumatera Barat Indonesia Village - 68 km
Pasar Baharoe Sumatera Barat Indonesia Village - 68 km
Pasirganting Sumatera Barat Indonesia Village - 69 km
Ganting Sumatera Barat Indonesia Village - 70 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
Sipora Rokot RKO unknown 0 71 km

Ports

Name LOCODE Country Distance
Telukbayur Indonesia 97 km

More information

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