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Great earthquake, 8.5 mag strikes near Chichi-shima in Japan

Earthquake location 27.9S, 140.8WA great earthquake magnitude 8.5 (mg/mb) has struck on Saturday, 166 kilometers (103 miles) from Chichi-shima in Japan. The temblor was reported at 20:23:00 / 8:23 pm (local time epicenter) at a depth of 696 km (432 miles). Global time of event 30/05/15 / 2015-05-30 11:23:00 / May 30, 2015 @ 11:23 am UTC/GMT. A tsunami warning has not been issued, according to the U.S. Geological Survey. Exact location of event, longitude 140.8 East, latitude 27.9 North, depth 696 km, unique identifier, pt15150050. Ids that are associated to the event, ,pt15150050,.

Did you feel it?

Leave a comment or report about shaking, activity and damage at your home, city and country. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded in: 166 km WNW of Chichi-shima, Japan.

More information

Parameter Value Description
Magnitude 8.5 mb The magnitude for the event.
Longitude 140.8° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 27.9° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 696 km Depth of the event in kilometers.
Place 166km WNW of Chichi-shima, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-05-30 11:23:00 Time when the event occurred. UTC/GMT
Updated 2015-05-30 11:34:33 Time when the event was most recently updated. UTC/GMT
Timezone offset 540 Timezone offset from UTC in minutes at the event epicenter.
Felt The total number of felt reports
CDI The maximum reported intensity for the event.
MMI The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status REVIEWED Indicates whether the event has been reviewed by a human.
Tsunami 0 This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG 1112 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network pt The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,pt, A comma-separated list of network contributors.
Number of Stations Used 0 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 100.799991936 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type Mi The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID pt15150050 Id of event.
Event Code 15150050 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,pt15150050, A comma-separated list of event ids that are associated to an event.


  1. Sasaki Takashi

    I felt it in Saitama Ken! huge but smooth shaking for aprox 2min straight…

  2. Pastor Doug

    We’re staying a hotel in Musanze. It woke up a number of us from our sleep. There were no damages and there were 2 aftershocks.

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