Light earthquake, 4 mag strikes near Yoichi in Japan

A light earthquake magnitude 4 (ml/mb) strikes 190 km NW of Yoichi, Japan (118 miles) on Friday. Exact time and date of earthquake 18/10/18 / 2018-10-18 19:40:52 / October 18, 2018 @ 7:40 pm UTC/GMT. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The earthquake occurred at a depth of 259.24 km (161 miles). The 4-magnitude earthquake was detected at 04:40:52 / 4:40 am (local time epicenter). Exact location of event, longitude 138.7956 East, latitude 44.1513 North, depth = 259.24 km. Id of earthquake: us1000he2w. Event ids that are associated: us1000he2w.

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

Questions or comments?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 190 km NW of Yoichi, Japan.

Japan Yoichi

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Parameter	Value	Description
Magnitude	4 mb	The magnitude for the event.
Longitude	138.7956° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	44.1513° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	259.24 km	Depth of the event in kilometers.
Place	190km NW of Yoichi, Japan	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2018-10-18 19:40:52	Time when the event occurred. UTC/GMT
Updated	2018-10-18 22:14:26	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	2.734	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.56 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	84	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	us1000he2w	Id of event.
Event Code	1000he2w	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us1000he2w,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4 mag strikes near Yoichi in Japan

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