M 5.1 in Japan on 31 Oct 2021 20:35 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: 5.1M
Depth: 12.51 Km
Lat/Lon: 33.3781 , 135.5757
Event Date: 31 Oct 2021 20:35 UTC
01 Nov 2021 05:35 Local
Exposed Population:
650 thousand in 100km
Source: NEIC us7000fqbj
Inserted at: 31 Oct 2021 20:53 UTC
INFORM Coping capacity of the alert score
1.5 (Japan)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0 0
us7000fqbj Scaled population (vector) 5.68  
  C1 earthquake 0.73  
  C2 earthquake -0.22  
  Country Vulnerability -0.71  
  INFORM_normalised 0.57  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1406034 0 31 Oct 2021 20:35 5.1M, 12.51km N/A 650 thousand (in 100km) 00:17 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 Japan , Region of Kinki (population 22,207,000) . The nearest places are Esumi, Tanami, Susami, Kushimoto, Naka, Hiki, Asakuragi, Okawa, Sakae, Matsune, and Gobo.

Radius Population
100 km 650000 people
75 km 300000 people
50 km 160000 people
20 km 6500 people
10 km no people
5 km no people
2 km no people

Affected Provinces

Region Province Country Population
Kinki Japan 22.2 million people

Affected populated places

Name Region Province Country City class Population Distance
Esumi Wakayama Japan Village - 15 km
Tanami Wakayama Japan Village - 18 km
Susami Wakayama Japan Village - 20 km
Kushimoto Wakayama Japan City - 22 km
Naka Wakayama Japan Village - 23 km
Hiki Wakayama Japan Village - 24 km
Asakuragi Wakayama Japan Village - 30 km
Okawa Wakayama Japan Village - 31 km
Sakae Wakayama Japan Village - 34 km
Matsune Wakayama Japan Village - 35 km
Takashiba Wakayama Japan Village - 38 km
Asso Wakayama Japan Village - 38 km
Yunosaki Wakayama Japan Village - 39 km
Hirase Wakayama Japan Village - 40 km
Koza Wakayama Japan Village - 40 km
Myoho Wakayama Japan Village - 41 km
Komugi Wakayama Japan Village - 42 km
Tanabe Wakayama Japan City 69000 people 43 km
Katsuura Wakayama Japan Village - 44 km
Kurisugawa Wakayama Japan Village - 44 km
Shizukawa Wakayama Japan Village - 50 km
Furuyadani Wakayama Japan Village - 50 km
Jujo Wakayama Japan Village - 50 km
Nishihera Wakayama Japan Village - 52 km
Doyukawa Wakayama Japan Village - 52 km
Hitari Wakayama Japan Village - 54 km
Shingu Wakayama Japan City 31000 people 55 km
Inami Wakayama Japan Village - 58 km
Osato Mie Japan Village - 60 km
Atawa Mie Japan Village - 63 km
Hiratani Nara Japan Village - 64 km
Sogawa Wakayama Japan Village - 65 km
Misa Wakayama Japan Village - 65 km
Okuma Wakayama Japan Village - 69 km
Fujii Wakayama Japan Village - 69 km
Gobo Wakayama Japan Village 27000 people 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
Kushimoto-Katsuura KUJ unknown 0 21 km
Nanki Shirahama SHM 105 Civ. Paved Yes 5900 37 km

Ports

Name LOCODE Country Distance
Kushimoto Japan 21 km
Uraga JPURG Japan 36 km
Tanabe JPTAE Japan 43 km
Shingu JPSHN Japan 56 km
Yura JPYUR Japan 77 km
Shimotsu JPSMT Japan 90 km
Kainan JPKAI Japan 92 km
Owase JPOWA Japan 96 km

Dams

Reservoir Dam Name River Year Distance
Nanairochosuichi Nanairo Kitayamagawa 1965 76 km
Kazeyachosuichi Kazeya Totsugawa 1960 76 km
Futagawa Futagawa Aritagawa 1966 81 km
Ikeharako Ikehara Kitayamagawa 1964 83 km
Asahichosuichi Asahi Asahigawa 1978 85 km
Sakamotochosuichi Sakamoto Higashinogawa 1962 91 km

More information

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