Apr 30, 2017

Green earthquake alert (4.5M,depth:57.94km) in Japan at 4/30/2017 10:30:32 AM

Green Earthquake in Japan


Population Density near epicenter (people/km2). Image area: 6x4 decimal degrees (approx. 650x450km2).


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

  • Earthquake Magnitude 4.5M, Depth:57.94km
  • 30 Apr 2017 10:30:32 UTC
  • 34297449 people within 100km

Whether international humanitarian aid is needed must be decided by an expert.

See the GDACS website for live news coverage (including OCHA Situation Reports), the full earthquake report

For information on emergency response, please consult the GDACS Virtual OSOCC.


Earthquake Event


  • Magnitude: 4.5 M
  • Depth: 57.94 km (deep)
  • Source: NEIC NEIC
  • Location (latitude/longitude): 35.6083, 140.2551
  • Time (UTC): 30 Apr 2017 10:30:32
  • Time (ECT): 30 Apr 2017 12:30:32

Earthquake Impact Details

The earthquake happened inJapan, Region of Kanto (population 38,543,000). The nearest places are Oami (11km), Chiba (910000 people , 12km), Sakura (180000 people , 12km), Togane (54000 people , 12km), Naruto (22000 people , 13km), and 158 more.

The following vulnerable infrastructure is nearby and may be affected.

For logistics, the following access points are nearby. The nearest airports are Shimoshizu (10km), Tokyo Narita International (runway 13100ft, 20km), Ryugasaki South (29km), Shimofusa (runway 7300ft, 30km), Ryugasaki (33km), and 13 more. The nearest ports are Chiba (13km), Anegasaki (14km), Goi (16km), Katunan Ko (26km), Kisarazu (39km), and 11 more.

The maximum altitude nearby is NaNm.

The population near the earthquake is shown in the table below.

Radius Population Density (people/km2)
75 km 21.2 million people 1200
50 km 7.7 million people 983
20 km 1.5 million people 1201
10 km 200000 people 644



While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information. The JRC is not responsible for any damage or loss resulting from the use of the information presented on this website. Please refer to the GDACS website for subscribing or unsubscribing from the earthquake alert email or SMS service.

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