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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.1 mag, 8 km SSE of Asahi, Japan



Earthquake location 35.644S, 140.6849WA light earthquake magnitude 4.1 (ml/mb) has occurred on Friday, 8 kilometers (5 miles) from Asahi in Japan. Exact time and date of earthquake 10/08/17 / 2017-08-10 15:05:38 / August 10, 2017 @ 3:05 pm UTC/GMT. The epicenter was at a depth of 43.04 km (27 miles). The temblor was picked up at 00:05:38 / 12:05 am (local time epicenter). Event id: us2000a8ei. Ids that are associated to the earthquake: us2000a8ei. Exact location, longitude 140.6849° East, latitude 35.644° North, depth = 43.04 km. 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 Kasama, Tokyo, Kawaguchi (min 5000 pop). Country/countries that might be effected, Japan (c. 127 288 000 pop). The epicenter was 90 km (56 miles) from Tokyo (c. 8 336 600 pop), 89 km (55 miles) from Kawasaki (c. 1 306 800 pop), 51 km (32 miles) from Chiba (c. 919 700 pop), 64 km (40 miles) from Funabashi (c. 560 700 pop), 73 km (45 miles) from Matsudo (c. 470 300 pop), 90 km (56 miles) from Kawaguchi (c. 468 600 pop).

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

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, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 8 km SSE of Asahi, Japan. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude 140.6849° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 35.644° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 43.04 km Depth of the event in kilometers.
Place 8km SSE of Asahi, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-08-10 15:05:38 Time when the event occurred. UTC/GMT
Updated 2017-09-01 15:51:55 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 259 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 2.201 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.83 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 142 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mwr The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us2000a8ei Id of event.
Event Code 2000a8ei An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000a8ei, A comma-separated list of event ids that are associated to an event.

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