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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.5 mag strikes near Iwai in Japan

Earthquake location 36.032S, 139.8702WA light earthquake magnitude 4.5 (ml/mb) has occurred on Wednesday, 3 kilometers (2 miles) from Iwai in Japan. Exact location, longitude 139.8702° East, latitude 36.032° North, depth = 58.71 km. The epicenter was at a depth of 58.71 km (36 miles). The 4.5-magnitude earthquake has occurred at 07:40:44 / 7:40 am (local time epicenter). Exact time and date of event in UTC/GMT: 17/10/17 / 2017-10-17 22:40:44 / October 17, 2017 @ 10:40 pm. Event ids that are associated to the earthquake: us1000awlx. Id of event: us1000awlx. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Epicenter of the earthquake was 41 km (26 miles) from Tokyo (c. 8 336 600 pop), 68 km (42 miles) from Yokohama (c. 3 574 400 pop), 59 km (36 miles) from Kawasaki (c. 1 306 800 pop), 24 km (15 miles) from Saitama (c. 1 193 400 pop), 27 km (17 miles) from Yono (c. 1 077 700 pop), 53 km (33 miles) from Chiba (c. 919 700 pop), 65 km (40 miles) from Hachiōji (c. 579 400 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Ōiso, Hadano, Hitachi. Country/countries that might be effected, Japan (c. 127 288 000 pop).

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

Did you feel anything?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage 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: 3 km SW of Iwai, Japan. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude 139.8702° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 36.032° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 58.71 km Depth of the event in kilometers.
Place 3km SW 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 2017-10-17 22:40:44 Time when the event occurred. UTC/GMT
Updated 2017-11-09 05:31:01 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 312 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 1.44 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.74 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 134 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 us1000awlx Id of event.
Event Code 1000awlx An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000awlx, A comma-separated list of event ids that are associated to an event.

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