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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.1 mag has occurred near Iwai in Japan



Earthquake location 36.075S, 139.916WA light earthquake magnitude 4.1 (ml/mb) has occurred on Wednesday, 3 kilometers (2 miles) from Iwai in Japan. All ids that are associated to the event: us20009xee. Unique identifier: us20009xee. Exact time and date of event in UTC/GMT: 11/07/17 / 2017-07-11 17:36:40 / July 11, 2017 @ 5:36 pm. The epicenter was at a depth of 70.31 km (44 miles). Exact location of earthquake, 139.916° East, 36.075° North, depth 70.31 km. The temblor was detected at 02:36:40 / 2:36 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Nearby country/countries that might be effected, Japan (c. 127 288 000 pop). Closest city/cities/towns to epicentrum/hypocenter was Kamakura, Hasaki, Fujisawa (min 5000 pop). Event epicenter was 47 km (29 miles) from Tokyo (c. 8 336 600 pop), 74 km (46 miles) from Yokohama (c. 3 574 400 pop), 64 km (40 miles) from Kawasaki (c. 1 306 800 pop), 30 km (19 miles) from Saitama (c. 1 193 400 pop), 33 km (21 miles) from Yono (c. 1 077 700 pop), 56 km (35 miles) from Chiba (c. 919 700 pop).

In the past 24 hours, there have been six, in the last 10 days six, in the past 30 days ten and in the last 365 days seventy-eight earthquakes of magnitude 3.0 or greater that has occurred 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.

How would you describe the shaking?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 3 km NNE of Iwai, Japan.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude 139.916° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 36.075° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 70.31 km Depth of the event in kilometers.
Place 3km NNE of Iwai, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-07-11 17:36:40 Time when the event occurred. UTC/GMT
Updated 2017-08-09 18:55:48 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 1.46 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.94 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 135 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 us20009xee Id of event.
Event Code 20009xee An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us20009xee, A comma-separated list of event ids that are associated to an event.

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