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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag was detected near Oyama in Japan

Earthquake location 33.3147S, 137.8657WA 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.

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More information

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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