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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag strikes near Hachijo-jima in Japan



Earthquake location 32.8705S, 139.3078WA light earthquake magnitude 4 (ml/mb) has occurred on Friday, 51 km WSW of Hachijo-jima, Japan (32 miles). Event id: us1000ax8l. Ids that are associated to the earthquake: us1000ax8l. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude 139.3078 East, latitude 32.8705 North, depth = 215.35 km. The earthquake occurred at a depth of 215.35 km (134 miles) below the earth’s surface. The temblor was reported at 05:21:31 / 5:21 am (local time epicenter). Date and time of earthquake in UTC/GMT: 26/10/17 / 2017-10-26 20:21:31 / October 26, 2017 @ 8:21 pm.

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. In the past 24 hours, there have been one, in the last 10 days two, in the past 30 days two and in the last 365 days six earthquakes of magnitude 3.0 or greater that have been detected nearby.

Questions or comments?

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, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 51 km WSW of Hachijo-jima, Japan. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude 139.3078° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 32.8705° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 215.35 km Depth of the event in kilometers.
Place 51km WSW of Hachijo-jima, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-10-26 20:21:31 Time when the event occurred. UTC/GMT
Updated 2017-11-07 23:44:00 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 246 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 0.47 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.09 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 184 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 us1000ax8l Id of event.
Event Code 1000ax8l An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000ax8l, A comma-separated list of event ids that are associated to an event.

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