Light earthquake, 4 mag was detected near Oyama in Japan

A light earthquake with magnitude 4 (ml/mb) was reported 146 km SSW of Oyama, Japan (91 miles) on Monday. The earthquake occurred at a depth of 333.79 km (207 miles) below the earth’s surface. Exact time and date of event in UTC/GMT: 27/02/17 / 2017-02-27 01:52:43 / February 27, 2017 @ 1:52 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Event ids that are associated to the earthquake: us100087hm. Id of event: us100087hm. Exact location of event, depth 333.79 km, 137.8657° East, 33.3147° North. The 4-magnitude earthquake was detected at 10:52:43 / 10:52 am (local time epicenter).

There are an estimated 13,000 light earthquakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been one, in the last 10 days two, in the past 30 days two and in the last 365 days ten earthquakes of magnitude 3.0 or greater that has struck near.

Questions or comments?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 146 km SSW of Oyama, Japan. This information comes from the USGS Earthquake Notification Service.

Japan Oyama

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Parameter	Value	Description
Magnitude	4 mb	The magnitude for the event.
Longitude	137.8657° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	33.3147° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	333.79 km	Depth of the event in kilometers.
Place	146km SSW of Oyama, Japan	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2017-02-27 01:52:43	Time when the event occurred. UTC/GMT
Updated	2017-03-09 05:30:32	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	246	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	2.145	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.77 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	154	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	us100087hm	Id of event.
Event Code	100087hm	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us100087hm,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4 mag was detected near Oyama in Japan

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