Light earthquake 4.4 mag, 153 km SW of Vaini, Tonga

A light earthquake magnitude 4.4 (ml/mb) has occurred on Thursday, 153 km SW of Vaini, Tonga (95 miles). The temblor was reported at 09:47:22 / 9:47 am (local time epicenter). Exact location, longitude -176.0817° West, latitude -22.3168° South, depth = 94.41 km. All ids that are associated to the event: us1000335s. Unique identifier: us1000335s. The earthquake occurred at a depth of 94.41 km (59 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact time and date of earthquake 30/07/15 / 2015-07-30 21:47:22 / July 30, 2015 @ 9:47 pm UTC/GMT.

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

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What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 153 km SW of Vaini, Tonga.

Tonga Vaini

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Parameter	Value	Description
Magnitude	4.4 mb	The magnitude for the event.
Longitude	-176.0817° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-22.3168° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	94.41 km	Depth of the event in kilometers.
Place	153km SW of Vaini, Tonga	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 21:47:22	Time when the event occurred. UTC/GMT
Updated	2015-08-25 00:48:56	Time when the event was most recently updated. UTC/GMT
Timezone offset	-720	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	298	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	6.601	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.43 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	131	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	us1000335s	Id of event.
Event Code	1000335s	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us1000335s,	A comma-separated list of event ids that are associated to an event.

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Light earthquake 4.4 mag, 153 km SW of Vaini, Tonga

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