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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.5 mag was detected near Iwaki in Japan

Earthquake location 36.9805S, 141.3022WA light earthquake with magnitude 4.5 (ml/mb) was reported 38 kilometers (24 miles) from Iwaki in Japan on Saturday. Exact location of earthquake, longitude 141.3022 East, latitude 36.9805 North, depth = 23.25 km. The 4.5-magnitude earthquake has occurred at 10:51:12 / 10:51 am (local time epicenter). The epicenter of the earthquake was roughly 23.25 km (14 miles) below the earth’s surface. Global date and time of event UTC/GMT: 20/10/18 / 2018-10-20 01:51:12 / October 20, 2018 @ 1:51 am. All ids that are associated to the event: us1000hgxl. Unique identifier: us1000hgxl. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Closest city/cities/towns to epicentrum/hypocenter was Katsuta, Hitachi-Naka, Kōriyama (min 5000 pop). Nearby country/countries that might be effected, Japan (c. 127 288 000 pop). Event epicenter was 38 km (24 miles) from Iwaki (c. 357 300 pop), 94 km (58 miles) from Kōriyama (c. 340 600 pop), 72 km (45 miles) from Hitachi (c. 186 300 pop), 94 km (59 miles) from Hitachi-Naka (c. 156 800 pop), 95 km (59 miles) from Katsuta (c. 156 000 pop), 88 km (55 miles) from Sukagawa (c. 68 800 pop), 54 km (33 miles) from Kitaibaraki (c. 50 800 pop).

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

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. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 38 km ESE of Iwaki, Japan.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude 141.3022° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 36.9805° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 23.25 km Depth of the event in kilometers.
Place 38km ESE of Iwaki, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-10-20 01:51:12 Time when the event occurred. UTC/GMT
Updated 2018-10-25 22:29:31 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 0.976 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.9 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 us1000hgxl Id of event.
Event Code 1000hgxl An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000hgxl, A comma-separated list of event ids that are associated to an event.

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