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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag was detected near Toba in Japan


Earthquake location 34.3409S, 137.1899WA light earthquake with magnitude 4 (ml/mb) was reported 35 kilometers (22 miles) from Toba in Japan on Friday. The epicenter was at a depth of 341.41 km (212 miles). Global date and time of event UTC/GMT: 21/12/18 / 2018-12-21 01:20:56 / December 21, 2018 @ 1:20 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Unique identifier: us2000j1zv. Ids that are associated to the event: us2000j1zv. The temblor was detected at 10:20:56 / 10:20 am (local time epicenter). Exact location, longitude 137.1899° East, latitude 34.3409° North, depth = 341.41 km.

Close country/countries, Japan (c. 127 288 000 pop) (That might be effected). Event epicenter was 64 km (40 miles) from Hamamatsu (c. 605 100 pop), 51 km (31 miles) from Toyohashi (c. 378 400 pop), 83 km (51 miles) from Toyota (c. 362 400 pop), 68 km (42 miles) from Okazaki (c. 352 400 pop), 87 km (54 miles) from Yokkaichi (c. 295 800 pop), 82 km (51 miles) from Suzuka (c. 191 500 pop). Closest city/cities/towns to epicentrum/hypocenter was Kakegawa, Kameyama, Mori (min 5000 pop).

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 thirteen earthquakes of magnitude 3.0 or greater that was reported nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. There are an estimated 13,000 light earthquakes in the world each year.

Questions or comments?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 35 km ESE of Toba, Japan.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude 137.1899° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 34.3409° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 341.41 km Depth of the event in kilometers.
Place 35km ESE of Toba, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-12-21 01:20:56 Time when the event occurred. UTC/GMT
Updated 2019-01-10 04:34:54 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 0.886 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.17 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 105 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 us2000j1zv Id of event.
Event Code 2000j1zv An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000j1zv, A comma-separated list of event ids that are associated to an event.

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