Light earthquake, 4.1 mag strikes near Chichi-shima in Japan

A light earthquake with magnitude 4.1 (ml/mb) was detected on Friday, 259 km WNW of Chichi-shima, Japan (161 miles). Date and time of earthquake in UTC/GMT: 30/07/15 / 2015-07-30 22:43:26 / July 30, 2015 @ 10:43 pm. The earthquake occurred at a depth of 493.21 km (306 miles) below the earth’s surface. Exact location of event, depth 493.21 km, 139.7081° East, 27.7631° North. Id of earthquake: us10002whn. Event ids that are associated: us10002whn. The temblor was reported at 07:43:26 / 7:43 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

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 three and in the last 365 days twenty-four earthquakes of magnitude 3.0 or greater that has struck near.

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Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 259 km WNW of Chichi-shima, Japan.

Chichi-shima Japan

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Parameter	Value	Description
Magnitude	4.1 mb	The magnitude for the event.
Longitude	139.7081° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	27.7631° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	493.21 km	Depth of the event in kilometers.
Place	259km WNW of Chichi-shima, Japan	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2015-07-30 22:43:26	Time when the event occurred. UTC/GMT
Updated	2015-07-30 23:36:06	Time when the event was most recently updated. UTC/GMT
Timezone offset	540	Timezone offset from UTC in minutes at the event epicenter.
Felt	0	The total number of felt reports
CDI	1	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	259	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	2.299	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.63 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	77	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	us10002whn	Id of event.
Event Code	10002whn	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us10002whn,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.1 mag strikes near Chichi-shima in Japan

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