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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4.2 quake has struck near Narita in Japan

Earthquake location 35.7588S, 140.4008WA light earthquake with magnitude 4.2 (ml/mb) was detected on Thursday, 8 kilometers (5 miles) from Narita in Japan. All ids that are associated to the event: us2000aaw5. Unique identifier: us2000aaw5. Exact location of earthquake, longitude 140.4008 East, latitude 35.7588 North, depth = 96.82 km. Global time and date of event 17/08/17 / 2017-08-17 06:44:33 / August 17, 2017 @ 6:44 am UTC/GMT. The temblor was detected at 15:44:33 / 3:44 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter of the earthquake was roughly 96.82 km (60 miles) below the earth’s surface.

Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Hayama, Kamakura, Tochigi. Epicenter of the earthquake was 64 km (40 miles) from Tokyo (c. 8 336 600 pop), 77 km (48 miles) from Yokohama (c. 3 574 400 pop), 67 km (42 miles) from Kawasaki (c. 1 306 800 pop), 69 km (43 miles) from Saitama (c. 1 193 400 pop), 71 km (44 miles) from Yono (c. 1 077 700 pop), 30 km (19 miles) from Chiba (c. 919 700 pop). Country/countries that might be effected, Japan (c. 127 288 000 pop).

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

Did you feel it?

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. 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: 8 km ESE of Narita, Japan.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 140.4008° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 35.7588° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 96.82 km Depth of the event in kilometers.
Place 8km ESE of Narita, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-08-17 06:44:33 Time when the event occurred. UTC/GMT
Updated 2017-09-14 10:29:35 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 271 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 1.943 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.67 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 172 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 us2000aaw5 Id of event.
Event Code 2000aaw5 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000aaw5, A comma-separated list of event ids that are associated to an event.

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