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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4 mag, 69 km SE of Toba, Japan


Earthquake location 33.9784S, 137.2919WA light earthquake magnitude 4 (ml/mb) strikes 69 kilometers (43 miles) from Toba in Japan on Saturday. Date and time of earthquake in UTC/GMT: 08/12/17 / 2017-12-08 23:15:20 / December 8, 2017 @ 11:15 pm. The temblor was picked up at 08:15:20 / 8:15 am (local time epicenter). The epicenter was at a depth of 344.46 km (214 miles). Exact location of earthquake, longitude 137.2919 East, latitude 33.9784 North, depth = 344.46 km. Unique identifier: us2000c4gc. Ids that are associated to the event: us2000c4gc. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Closest city/cities/towns to epicentrum/hypocenter was Hamamatsu, Toyohashi, Toyohama (min 5000 pop). Nearby country/countries that might be effected, Japan (c. 127 288 000 pop). Epicenter of the earthquake was 90 km (56 miles) from Hamamatsu (c. 605 100 pop), 88 km (55 miles) from Toyohashi (c. 378 400 pop), 78 km (49 miles) from Ise (c. 97 300 pop), 85 km (53 miles) from Kosai-shi (c. 43 700 pop), 77 km (48 miles) from Tahara (c. 38 200 pop), 70 km (43 miles) from Toba (c. 23 300 pop).

Every year there are an estimated 13,000 light earthquakes in the world. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been two, 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 have been detected in the same area.

Did you feel the quake?

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. 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: 69 km SE of Toba, Japan.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude 137.2919° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 33.9784° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 344.46 km Depth of the event in kilometers.
Place 69km SE 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 2017-12-08 23:15:20 Time when the event occurred. UTC/GMT
Updated 2017-12-15 04:38:24 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 1.015 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.68 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 72 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 us2000c4gc Id of event.
Event Code 2000c4gc An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000c4gc, A comma-separated list of event ids that are associated to an event.

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