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Light earthquake: M4.2 quake strikes near Ryotsu in Japan


Earthquake location 39.3793S, 138.2519WA light earthquake magnitude 4.2 (mg/mb) has striked on Tuesday, 144 kilometers (89 miles) from Ryotsu in Japan. The temblor was reported at 09:50:07 / 9:50 am (local time epicenter) at a depth of 232.08 km (144 miles). Global time of event 2015-01-20 12:50:07 UTC/GMT. A tsunami warning has not been issued, according to the U.S. Geological Survey. Exact location of event, longitude 138.2519 East, latitude 39.3793 North, depth 232.08 km.

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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: 144 km N of Ryotsu, Japan.


More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 138.2519° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 39.3793° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 232.08 km Depth of the event in kilometers.
Place 144km N of Ryotsu, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-01-20 00:50:07 Time when the event occurred. UTC/GMT
Updated 2015-02-07 05:05:19 Time when the event was most recently updated. UTC/GMT
Timezone offset 540 Timezone offset from UTC in minutes at the event epicenter.
Felt 0 The total number of felt reports
CDI 1 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 271 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network us The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,us, A comma-separated list of network contributors.
Number of Stations Used The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 1.337 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.5 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 73 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mb The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID usc000thcn Id of event.
Event Code c000thcn An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,usc000thcn, A comma-separated list of event ids that are associated to an event.

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