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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.1 mag has occurred near Ichihara in Japan


Earthquake location 35.5191S, 139.9796WA light earthquake magnitude 4.1 (ml/mb) has struck on Thursday, 9 kilometers (6 miles) from Ichihara in Japan. The temblor was picked up at 08:39:47 / 8:39 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The earthquake was roughly at a depth of 59.16 km (37 miles). Date and time of earthquake in UTC/GMT: 17/06/15 / 2015-06-17 23:39:47 / June 17, 2015 @ 11:39 pm. Exact location of earthquake, 139.9796° East, 35.5191° North, depth 59.16 km. All ids that are associated to the event: us10002mux. Unique identifier: us10002mux.

Nearby country/countries that might be effected, Japan (c. 127 288 000 pop). Earthquake epicenter was 32 km (20 miles) from Tokyo (c. 8 336 600 pop), 32 km (20 miles) from Yokohama (c. 3 574 400 pop), 24 km (15 miles) from Kawasaki (c. 1 306 800 pop), 52 km (32 miles) from Saitama (c. 1 193 400 pop), 51 km (32 miles) from Yono (c. 1 077 700 pop), 16 km (10 miles) from Chiba (c. 919 700 pop). Closest city/cities/towns to epicentrum/hypocenter was Tatebayashi, Oyama, Ogawa (min 5000 pop).

In the past 24 hours, there have been five, in the last 10 days eight, in the past 30 days eleven and in the last 365 days fourty-six earthquakes of magnitude 3.0 or greater that have been detected in the same area. Each 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.

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: 9 km W of Ichihara, 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 139.9796° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 35.5191° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 59.16 km Depth of the event in kilometers.
Place 9km W of Ichihara, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-06-17 23:39:47 Time when the event occurred. UTC/GMT
Updated 2015-07-16 00:49:58 Time when the event was most recently updated. UTC/GMT
Timezone offset 540 Timezone offset from UTC in minutes at the event epicenter.
Felt 0 The total number of felt reports
CDI 1 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 0.73 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.36 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 163 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 us10002mux Id of event.
Event Code 10002mux An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10002mux, A comma-separated list of event ids that are associated to an event.

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