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Light World Earthquakes Magnitude 4-4.9

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


Earthquake location 41.771S, 141.262WA light earthquake magnitude 4.2 (ml/mb) strikes 43 kilometers (27 miles) from Hakodate in Japan on Monday. The temblor was reported at 10:08:02 / 10:08 am (local time epicenter). Id of earthquake: us1000hb5a. Event ids that are associated: us1000hb5a. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter was at a depth of 83.89 km (52 miles). Exact location of event, longitude 141.262 East, latitude 41.771 North, depth = 83.89 km. Global time and date of event 08/10/18 / 2018-10-08 01:08:02 / October 8, 2018 @ 1:08 am UTC/GMT.

Nearest cities/city/towns to hypocenter/epicentrum was Shiraoi, Date, Muroran (min 5000 pop). Epicenter of the earthquake was 44 km (27 miles) from Hakodate (c. 275 700 pop), 65 km (40 miles) from Muroran (c. 96 200 pop), 54 km (33 miles) from Mutsu (c. 49 200 pop), 51 km (32 miles) from Kamiiso (c. 38 100 pop), 84 km (52 miles) from Date (c. 35 300 pop), 50 km (31 miles) from Nanae (c. 30 000 pop). Close country/countries that might be effected, Japan (c. 127 288 000 pop).

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

Questions or comments?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking 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: 43 km E of Hakodate, Japan.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 141.262° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 41.771° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 83.89 km Depth of the event in kilometers.
Place 43km E of Hakodate, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-10-08 01:08:02 Time when the event occurred. UTC/GMT
Updated 2018-10-15 00:25:14 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 0.991 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 106 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 us1000hb5a Id of event.
Event Code 1000hb5a An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000hb5a, A comma-separated list of event ids that are associated to an event.

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