M 4.7 in Japan on 28 Dec 2020 19:23 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: 4.7M
Depth: 439.19 Km
Lat/Lon: 33.1445 , 135.8248
Event Date: 28 Dec 2020 19:23 UTC
29 Dec 2020 04:23 Local
Exposed Population:
260000 people within 100km
Source: NEIC us6000d3r7
Inserted at: 29 Dec 2020 23:19 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
us6000d3r7 Scaled population (vector) 0  
  C1 earthquake 1  
  C2 earthquake 0  
  Country Vulnerability 0  
  INFORM_normalised 1  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1350146 0 28 Dec 2020 19:23 4.8M, 433.82km N/A 270 thousand (in 100km) 00:15 NEIC
1350395 0 28 Dec 2020 19:23 4.7M, 439.19km N/A 270 thousand (in 100km) 1d 03:56 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 Kushimoto, Tanami, Esumi, Takashiba, Koza, Naka, Katsuura, Susami, Myoho, Matsune, and Hirase.

Radius Population
100 km 270000 people
75 km 140000 people
50 km 24000 people
20 km no 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
Shikoku Japan 4.3 million people
Chubu Japan 5.2 million people
Chugoku Japan 8 million people
Kyushu Japan 13.3 million people
Kanto Japan 38.5 million people
Tohoku Japan 10 million people

Affected populated places

Name Region Province Country City class Population Distance
Kushimoto Wakayama Japan City - 36 km
Tanami Wakayama Japan Village - 40 km
Esumi Wakayama Japan Village - 45 km
Takashiba Wakayama Japan Village - 48 km
Koza Wakayama Japan Village - 49 km
Naka Wakayama Japan Village - 52 km
Katsuura Wakayama Japan Village - 54 km
Susami Wakayama Japan Village - 54 km
Myoho Wakayama Japan Village - 55 km
Matsune Wakayama Japan Village - 59 km
Hiki Wakayama Japan Village - 59 km
Komugi Wakayama Japan Village - 59 km
Okawa Wakayama Japan Village - 61 km
Nishihera Wakayama Japan Village - 62 km
Asakuragi Wakayama Japan Village - 65 km
Shingu Wakayama Japan City 31000 people 66 km
Sakae Wakayama Japan Village - 69 km
Hirase Wakayama Japan 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
Kushimoto-Katsuura KUJ unknown 0 33 km
Nanki Shirahama SHM 105 Civ. Paved Yes 5900 72 km

Ports

Name LOCODE Country Distance
Kushimoto Japan 36 km
Uraga JPURG Japan 46 km
Shingu JPSHN Japan 67 km
Tanabe JPTAE Japan 77 km

Dams

Reservoir Dam Name River Year Distance
Nanairochosuichi Nanairo Kitayamagawa 1965 92 km
Kazeyachosuichi Kazeya Totsugawa 1960 100 km

More information

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