Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 3.8 on date 18-03-2023 and time 11:20:54 (UTC) in region Libya [Sea]

A magnitude ML 3.8 earthquake occured in region: Libya [Sea], on

  • 18-03-2023 11:20:54 (UTC)
  • 18-03-2023 12:20:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 34.5030, 13.9870 at 13 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.

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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
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 3.8 2023-03-18
11:20:54		 34.5033 13.9872 13 2023-03-18
11:35:06		 Sala Sismica INGV-Roma 115503381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-18 11:20:54 ± 0.47
Latitude 34.5033 ± 0.0486
Longitude 13.9872 ± 0.0240
Depth (km) 13 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 115503381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 5477
Semi-minor axis of confidence ellipse (meter) 1170
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 165
Circular confidence region, given by single value of horizontal uncertainty (meter) 5480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 292
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 2.96147
Number of stations at which the event was observed 41
Number of stations from which data was used for origin computation 13
Magnitude information

ML:3.8

Field Value
Value 3.8
Uncertainty 0.3
Num. used stations 67
Type of magnitude ML
Reference to an origin 115503381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-18 11:35:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RM33.EHZ. 2023-03-18T11:23:11.11 3.0 negative manual Pg 19.610001 0
IV.EL6.EHZ. 2023-03-18T11:23:01.35 3.0 undecidable manual Pn -1.45 0
IV.MF5.EHZ. 2023-03-18T11:22:54.27 3.0 negative manual Pn -3.55 0
IV.SPS2.HHZ. 2023-03-18T11:22:51.88 3.0 undecidable manual Sn -7.72 0
IV.SNAL.HNZ. 2023-03-18T11:22:46.53 3.0 undecidable manual Pg 16.219999 0
IV.AMUR.HHZ. 2023-03-18T11:22:33.59 3.0 negative manual Pn -0.45 0
IV.MRLC.HHZ. 2023-03-18T11:22:31.41 3.0 negative manual Pn 2.8 0
MN.VSL.HHZ. 2023-03-18T11:22:25.98 3.0 positive manual Pn -5.01 0
IV.ERC.EHZ. 2023-03-18T11:22:24.52 3.0 undecidable manual Sn -1.51 0
IV.CAR1.HHZ. 2023-03-18T11:22:11.13 3.0 positive manual Pn -0.48 0
IV.SERS.HHZ. 2023-03-18T11:22:10.94 3.0 negative manual Pn -0.58 0
IV.CLTA.HHZ. 2023-03-18T11:22:08.27 0.6 undecidable manual S 360 2.6530 54 -0.69 20
IV.HAVL.HHZ. 2023-03-18T11:22:08.80 0.3 undecidable manual S 20 2.6215 54 0.6 26
IV.HMDC.HHZ. 2023-03-18T11:22:06.32 0.6 undecidable manual S 15 2.5379 54 0.13 22
IV.PLAC.HHZ. 2023-03-18T11:22:02.64 3.0 negative manual Pn -0.71 0
IV.HPAC.HHZ. 2023-03-18T11:22:01.67 0.6 undecidable manual S 21 2.3634 54 -0.35 27
IV.IACL.HHZ. 2023-03-18T11:21:56.71 3.0 positive manual Pn 0.1 0
IV.MSRU.HHZ. 2023-03-18T11:21:56.07 3.0 undecidable manual Pn -0.05 0
IV.IVPL.HHZ. 2023-03-18T11:21:55.80 3.0 negative manual Pn 0.17 0
IV.SOI.EHZ. 2023-03-18T11:21:55.78 3.0 negative manual Pn -0.97 0
IV.MRCB.HHZ. 2023-03-18T11:21:55.96 3.0 positive manual Pn 0.15 0
IV.EPZF.HHZ. 2023-03-18T11:21:53.25 3.0 negative manual Pg 5.26 0
IV.MUCR.HHZ. 2023-03-18T11:21:51.18 3.0 negative manual P 0.26 0
IV.LIBRI.HHZ. 2023-03-18T11:21:51.77 3.0 negative manual P 0.15 0
IV.AIO.HHZ. 2023-03-18T11:21:51.17 3.0 negative manual Pn -0.08 0
IV.MSFR.HHZ. 2023-03-18T11:21:51.30 3.0 negative manual Pn 1.17 0
IV.PLLN.EHZ. 2023-03-18T11:21:49.36 3.0 negative manual Pn 0.25 0
IV.MBFT.HHZ. 2023-03-18T11:21:49.42 3.0 positive manual Pn -1.56 0
IV.GIB.HHZ. 2023-03-18T11:21:48.80 3.0 undecidable manual Pn -0.28 0
IV.CSLB.HHZ. 2023-03-18T11:21:47.90 3.0 positive manual Pn -0.45 0
IV.CIMI.HHZ. 2023-03-18T11:21:47.69 3.0 undecidable manual Pn -0.46 0
IV.RESU.HHZ. 2023-03-18T11:21:45.58 3.0 negative manual Pn 1.21 0
IV.LINA.HHE. 2023-03-18T11:21:44.33 0.3 undecidable manual S 326 1.6467 54 -0.56 68
IV.CMDO.HHZ. 2023-03-18T11:21:42.16 0.1 undecidable manual P 357 2.9615 54 0.47 30
IV.CPTP.HHZ. 2023-03-18T11:21:41.29 0.1 undecidable manual P 3 2.9057 54 0.37 32
IV.HVZN.HHE. 2023-03-18T11:21:38.34 0.1 undecidable manual P 12 2.7375 54 -0.26 36
MN.WDD.HHZ. 2023-03-18T11:21:38.07 0.6 undecidable manual S 18 1.4029 91 -0.33 48
IV.CLTA.HHZ. 2023-03-18T11:21:36.69 0.6 negative manual P 360 2.6530 54 -0.74 18
IV.HAVL.HHZ. 2023-03-18T11:21:36.81 1.0 negative manual P 20 2.6215 54 -0.19 10
IV.HMDC.HHZ. 2023-03-18T11:21:35.27 0.1 undecidable manual P 15 2.5379 54 -0.56 42
IV.HVIT.HHE. 2023-03-18T11:21:34.82 0.1 undecidable manual P 10 2.5253 54 -0.84 39
IV.HPAC.HHZ. 2023-03-18T11:21:33.64 0.1 undecidable manual P 21 2.3634 54 0.22 54
IV.CROCE.HHE. 2023-03-18T11:21:32.72 0.1 undecidable manual P 11 2.3697 54 -0.8 46
IV.LINA.HHE. 2023-03-18T11:21:23.66 0.1 undecidable manual P 326 1.6467 54 0.13 90
IV.LPDG.HHE. 2023-03-18T11:21:21.42 0.1 undecidable manual P 313 1.5046 91 -0.09 96
ML.MSDA.BHE. 2023-03-18T11:21:20.04 0.1 undecidable manual P 16 1.4551 91 -0.63 99
MN.WDD.HHZ. 2023-03-18T11:21:19.74 0.1 undecidable manual P 18 1.4029 91 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.WDD.HHN. ML:3.9 0.0035968429999999997 0.576 AML other m 2023-03-18T11:21:50.91
MN.WDD.HHE. ML:4.1 0.0056876255 0.48 AML other m 2023-03-18T11:21:49.23
IV.HPAC.HHE. ML:4.0 0.0019181744999999999 0.5632 AML other m 2023-03-18T11:22:31.12
IV.HPAC.HHN. ML:3.9 0.001367028 0.6784 AML other m 2023-03-18T11:22:28.88
IV.HMDC.HNE. ML:3.9 0.0012851694999999998 0.5824 AML other m 2023-03-18T11:22:31.80
IV.HMDC.HHE. ML:3.3 0.0003130155 0.6016 AML other m 2023-03-18T11:22:31.80
IV.CMDO.HHE. ML:0.0 0.0004973628500000001 0.9216 AML other m 2023-03-18T11:22:24.13
IV.CMDO.HNE. ML:0.0 0.00047659030000000004 0.9216 AML other m 2023-03-18T11:22:24.13
IV.CLTA.HHE. ML:3.5 0.00044570045000000004 0.8448 AML other m 2023-03-18T11:22:29.36
IV.HMDC.HHN. ML:4.1 0.001716841 0.5824 AML other m 2023-03-18T11:22:36.06
IV.HMDC.HNN. ML:4.1 0.0017191095 0.7488 AML other m 2023-03-18T11:22:36.07
IV.HAVL.HHE. ML:0.0 0.001194532 0.6848 AML other m 2023-03-18T11:22:30.96
IV.HAVL.HHN. ML:4.0 0.001385 0.8 AML other m 2023-03-18T11:22:27.62
IV.CIMI.HNN. ML:3.9 0.000639 0.82 AML other m 2023-03-18T11:22:32.96
IV.CIMI.HHN. ML:3.9 0.000569 0.8 AML other m 2023-03-18T11:22:32.96
IV.CPTP.HHN. ML:3.9 0.0007745 1.36 AML other m 2023-03-18T11:22:33.16
IV.CPTP.HHE. ML:3.9 0.0008315 1 AML other m 2023-03-18T11:22:34.59
IV.CSLB.HNE. ML:3.6 0.000249 1.22 AML other m 2023-03-18T11:22:34.80
IV.CSLB.HHE. ML:3.5 0.0002215 1.22 AML other m 2023-03-18T11:22:34.81
IV.MBFT.HHE. ML:3.5 0.00017449999999999999 0.54 AML other m 2023-03-18T11:22:35.69
IV.AIO.HHE. ML:3.7 0.00027237655 0.48 AML other m 2023-03-18T11:22:35.72
IV.MBFT.HHN. ML:3.4 0.0001415 1.16 AML other m 2023-03-18T11:22:36.59
IV.CSLB.HNN. ML:3.8 0.0003965 0.58 AML other m 2023-03-18T11:22:37.22
IV.CSLB.HHN. ML:3.8 0.00038649999999999996 0.58 AML other m 2023-03-18T11:22:37.23
IV.CMDO.HHN. ML:0.0 0.00034790660000000003 1.12 AML other m 2023-03-18T11:22:19.60
IV.CMDO.HNN. ML:0.0 0.0003452786 1.1328 AML other m 2023-03-18T11:22:19.60
IV.RESU.HHN. ML:3.2 0.0001365 0.58 AML other m 2023-03-18T11:22:38.51
IV.PLLN.EHN. ML:4.3 0.00128 1.4 AML other m 2023-03-18T11:22:40.98
IV.AIO.HHN. ML:3.7 0.0002924466 0.544 AML other m 2023-03-18T11:22:41.36
IV.RESU.HHE. ML:3.0 0.0000847 0.7 AML other m 2023-03-18T11:22:41.61
IV.CIMI.HHE. ML:3.9 0.000521 1.28 AML other m 2023-03-18T11:22:42.68
IV.CIMI.HNE. ML:3.9 0.0005535 1.32 AML other m 2023-03-18T11:22:42.70
IV.MSFR.HHE. ML:3.4 0.00013251545 0.7808 AML other m 2023-03-18T11:22:42.25
IV.MUCR.HHN. ML:3.9 0.0004545 0.68 AML other m 2023-03-18T11:22:43.39
IV.LIBRI.HHN. ML:3.7 0.00028149999999999996 0.72 AML other m 2023-03-18T11:22:43.84
IV.LIBRI.HNN. ML:3.8 0.00034550000000000005 0.74 AML other m 2023-03-18T11:22:43.85
IV.MSRU.HHN. ML:4.2 0.0007935 0.68 AML other m 2023-03-18T11:22:43.21
IV.GIB.HHE. ML:4.2 0.0010507438 0.544 AML other m 2023-03-18T11:22:43.69
IV.MSFR.HHN. ML:3.5 0.00020400000000000003 0.7 AML other m 2023-03-18T11:22:44.86
IV.IVPL.HNE. ML:3.9 0.00035875675 0.2496 AML other m 2023-03-18T11:22:10.86
IV.IVPL.HHE. ML:4.0 0.0004922959999999999 0.7808 AML other m 2023-03-18T11:22:45.96
IV.MUCR.HHE. ML:3.8 0.000391 0.6 AML other m 2023-03-18T11:22:47.60
IV.SOI.EHE. ML:3.8 0.0003155 0.76 AML other m 2023-03-18T11:22:48.69
IV.PLLN.EHE. ML:4.2 0.0010538553 0.7168 AML other m 2023-03-18T11:22:49.33
IV.MSRU.HHE. ML:4.2 0.0007495000000000001 0.98 AML other m 2023-03-18T11:22:49.96
IV.MRCB.HHN. ML:3.9 0.000367 1.24 AML other m 2023-03-18T11:22:50.32
IV.GIB.HHN. ML:4.1 0.0008348330500000001 0.48 AML other m 2023-03-18T11:22:43.80
IV.LIBRI.HNE. ML:3.8 0.00034250000000000003 0.74 AML other m 2023-03-18T11:22:51.59
IV.LIBRI.HHE. ML:3.7 0.00027 1.16 AML other m 2023-03-18T11:22:51.59
IV.IACL.HHN. ML:3.9 0.00033208165 0.48 AML other m 2023-03-18T11:22:54.48
IV.PLAC.HNE. ML:3.8 0.000183 1.3 AML other m 2023-03-18T11:22:59.10
IV.IACL.HHE. ML:4.0 0.000428 0.6 AML other m 2023-03-18T11:23:00.54
IV.PLAC.HHE. ML:3.8 0.000179083 0.7616 AML other m 2023-03-18T11:23:00.07
IV.PLAC.HHN. ML:3.8 0.000222 0.52 AML other m 2023-03-18T11:23:01.04
IV.PLAC.HNN. ML:4.0 0.000298 1.4 AML other m 2023-03-18T11:23:01.06
IV.IVPL.HNN. ML:3.8 0.00028883365 0.384 AML other m 2023-03-18T11:23:03.97
IV.IVPL.HHN. ML:4.0 0.00044657809999999997 0.544 AML other m 2023-03-18T11:22:21.70
IV.SOI.EHN. ML:3.6 0.00018364205 0.6016 AML other m 2023-03-18T11:22:50.64
IV.MRCB.HHE. ML:3.8 0.00026072300000000003 0.896 AML other m 2023-03-18T11:22:49.39
IV.SERS.HHN. ML:3.5 0.00007088723999999999 0.4992 AML other m 2023-03-18T11:23:08.27
IV.SERS.HHE. ML:3.6 0.00008269999999999999 0.76 AML other m 2023-03-18T11:23:19.58
MN.WDD.HNN. ML:2.1 0.000058291015 0.9856 AML other m 2023-03-18T11:21:39.72
IV.MBFT.HNE. ML:3.3 0.0001316539 0.8512 AML other m 2023-03-18T11:22:10.97
IV.MBFT.HNN. ML:3.4 0.00016384555 1.2608 AML other m 2023-03-18T11:22:43.34
IV.SERS.HNE. ML:4.6 0.00078918155 1.1968 AML other m 2023-03-18T11:23:09.67
IV.SERS.HNN. ML:4.3 0.0003645885 1.216 AML other m 2023-03-18T11:23:09.67
IV.CAR1.HNE. ML:3.9 0.00014670895 0.7872 AML other m 2023-03-18T11:22:43.80
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download