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Light earthquake: M4.4 quake has struck near Yotsukaidō in Japan

Earthquake location 35.6472S, 140.2009WA light earthquake with magnitude 4.4 (ml/mb) was reported 3 kilometers (2 miles) from Yotsukaidō in Japan on Thursday. The 4.4-magnitude earthquake has occurred at 22:04:24 / 10:04 pm (local time epicenter). Date and time of earthquake in UTC/GMT: 21/01/21 / 2021-01-21 22:04:24 / January 21, 2021 @ 10:04 pm. Id of earthquake: us7000d28g. Event ids that are associated: us7000d28g. Exact location of earthquake, longitude 140.2009 East, latitude 35.6472 North, depth = 68.37 km. The earthquake occurred at a depth of 68.37 km (42 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Country/countries that might be effected, Japan (c. 127 288 000 pop). Epicenter of the event was 46 km (29 miles) from Tokyo (c. 8 336 600 pop), 55 km (34 miles) from Yokohama (c. 3 574 400 pop), 46 km (29 miles) from Kawasaki (c. 1 306 800 pop), 57 km (35 miles) from Saitama (c. 1 193 400 pop), 58 km (36 miles) from Yono (c. 1 077 700 pop), 8 km (5 miles) from Chiba (c. 919 700 pop). Closest city/cities/towns to epicentrum/hypocenter was Ninomiya, Hadano, Mibu (min 5000 pop).

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

Questions or comments?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 3 km E of Yotsukaidō, Japan. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.4 mb The magnitude for the event.
Longitude 140.2009° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 35.6472° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 68.37 km Depth of the event in kilometers.
Place 3 km E of Yotsukaidō, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2021-01-21 22:04:24 Time when the event occurred. UTC/GMT
Updated 2021-01-21 23:02:37 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt 1 The total number of felt reports
CDI 2.7 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 298 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 1.843 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.7 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 113 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 us7000d28g Id of event.
Event Code 7000d28g An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000d28g, A comma-separated list of event ids that are associated to an event.

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