Earthquake with magnitude of mb 4.3 on date 04-08-2018 and time 06:07:08 (Italy) in region Libya [Sea]

A magnitude mb 4.3 earthquake occured in region: Libya [Sea], on

  • 04-08-2018 04:07:08 (UTC)
  • 04-08-2018 06:07:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 34.4, 13.68 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 inhabitants.

Recent and historical Seismicity
Seismic hazard
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire ( that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 mb 4.3
Mwp 4.3
34.4 13.68 10 2018-08-04
Sala Sismica INGV-Roma 59336401
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2018-08-04 04:07:08
Latitude 34.40
Longitude 13.68
Depth (km) 10 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 59336401


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3193
Semi-minor axis of confidence ellipse (meter) 99
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 334
Circular confidence region, given by single value of horizontal uncertainty (meter) 2578
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 171.175
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.21099
Epicentral distance of station closest to the epicenter (degree) 1.59961
Epicentral distance of station farthest from the epicenter (degree) 11.53259
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information


Field Value
Value 4.3
Uncertainty 0.3
Num. used stations 2
Type of magnitude Mwp
Reference to an origin 59336401
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-08-04 04:53:18


Field Value
Value 4.3
Uncertainty 0.2
Num. used stations 9
Type of magnitude mb
Reference to an origin 59336401
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-08-04 04:53:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
HL.RDO.HHZ. 2018-08-04T04:09:53.61 10.0 negative automatic P 51 11.5326 0.410424 0.97561
RD.PGF.BHZ. 2018-08-04T04:09:20.24 10.0 positive automatic P 337 8.934 2.46191 0.970874
HT.LIT.HHZ. 2018-08-04T04:09:19.34 10.0 positive automatic P 48 9.0336 0.303352 0.980392
HT.FNA.HHZ. 2018-08-04T04:09:17.33 10.0 positive automatic P 41 8.8282 1.06764 0.952381
HL.ITM.HHZ. 2018-08-04T04:08:55.12 10.0 negative automatic P 65 7.2424 0.672494 0.980392
HL.KEK.HHZ. 2018-08-04T04:08:52.54 10.0 positive automatic P 41 7.2152 -1.50054 0.980392
MN.VSL.BHZ. 2018-08-04T04:08:39.12 10.0 positive automatic P 327 6.1484 -0.299691 0.952381
MN.CUC.BHZ. 2018-08-04T04:08:35.22 10.0 positive automatic P 16 5.8511 -0.157694 0.888889
MN.TIP.BHZ. 2018-08-04T04:08:28.67 10.0 positive automatic P 26 5.3817 -0.287627 0.930233
MN.CEL.BHZ. 2018-08-04T04:08:13.67 10.0 positive automatic P 24 4.257 0.186585 0.909091
TT.TATN.BHZ.00 2018-08-04T04:07:58.22 10.0 positive automatic P 236 3.1927 -0.607642 0.952381
MN.CLTB.BHZ. 2018-08-04T04:07:57.90 10.0 positive automatic P 353 3.2046 -1.16245 0.909091
MN.WDD.BHZ. 2018-08-04T04:07:35.67 10.0 positive automatic P 25 1.5996 -1.16235 0.97561
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download