Earthquake with magnitude of ML 1.6 on date 06-04-2018 and time 21:15:50 (UTC) in region Tirreno Meridionale (MARE)

A magnitude ML 1.6 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 06-04-2018 21:15:50 (UTC)
  • 06-04-2018 23:15:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.4860, 12.5050 at 9 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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

An earthquake occurred to
52 Km N of Trapani (68759 inhabitants)
77 Km N of Marsala (83194 inhabitants)
85 Km NW of Palermo (674435 inhabitants)
93 Km N of Mazara del Vallo (51718 inhabitants)
99 Km W of Bagheria (55387 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
Bulletin
Rev1000
ML 1.6 2018-04-06
21:15:50
38.4857 12.505 9 2019-04-24
14:49:34
Bollettino Sismico Italiano INGV 57336081
Reviewed
Rev100
ML 1.7 2018-04-06
21:15:50
38.4792 12.5407 34 2018-04-06
21:30:36
Sala Sismica INGV-Roma 55197461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-04-06 21:15:50 ± 0.58
Latitude 38.4857 ± 0.0225
Longitude 12.5050 ± 0.0368
Depth (km) 9 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 57336081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3570
Semi-minor axis of confidence ellipse (meter) 1920
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 303
Circular confidence region, given by single value of horizontal uncertainty (meter) 3570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 251
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.54
Epicentral distance of station closest to the epicenter (degree) 0.45236
Epicentral distance of station farthest from the epicenter (degree) 1.06570
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 57336081
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-02-20 17:55:45

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 55197461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-04-06 21:30:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SOLUN.HHE. 2018-04-06T21:16:20.32 0.6 undecidable manual S 116 99.5226 50 0.14 50
IV.CRJA.HHZ. 2018-04-06T21:16:18.02 0.3 undecidable manual S 150 87.5457 50 1.07 56
IV.MARS.EHN. 2018-04-06T21:16:16.49 0.3 undecidable manual S 176 81.4518 50 1.16 54
IV.MPG.SHZ. 2018-04-06T21:16:15.45 0.6 undecidable manual S 116 82.6506 50 -0.21 51
IV.MBFT.HHZ. 2018-04-06T21:16:11.50 0.6 undecidable manual S 147 71.4729 50 -1.18 36
IV.USI.HHE. 2018-04-06T21:16:11.25 0.6 undecidable manual S 67 63.3921 50 0.72 46
MN.CLTB.HHN. 2018-04-06T21:16:10.95 0.3 undecidable manual P 148 118.2927 50 0.36 69
IV.SOLUN.HHE. 2018-04-06T21:16:07.02 0.3 undecidable manual P 116 99.5226 50 -0.68 65
IV.MMGO.HHZ. 2018-04-06T21:16:07.60 0.1 undecidable manual P 156 100.2219 50 -0.21 99
IV.CRJA.HHZ. 2018-04-06T21:16:06.12 0.1 undecidable manual P 150 87.5457 50 0.27 100
IV.CORL.HHZ. 2018-04-06T21:16:06.86 0.3 undecidable manual P 133 95.6376 50 -0.25 74
IV.MFNL.HHE. 2018-04-06T21:16:06.14 0.6 undecidable manual P 155 85.248 50 0.64 45
IV.MARS.EHN. 2018-04-06T21:16:05.20 0.3 undecidable manual P 176 81.4518 50 0.29 75
IV.MPG.SHZ. 2018-04-06T21:16:04.62 0.3 undecidable manual P 116 82.6506 50 -0.48 72
IV.ERC.EHZ. 2018-04-06T21:16:03.42 0.6 undecidable manual S 172 50.2164 50 -3.58 3
IV.MBFT.HHZ. 2018-04-06T21:16:02.71 0.1 undecidable manual P 147 71.4729 50 -0.67 92
IV.USI.HHE. 2018-04-06T21:16:02.59 0.3 undecidable manual P 67 63.3921 50 0.46 75
IV.ERC.EHZ. 2018-04-06T21:15:57.86 0.3 undecidable manual P 172 50.2164 50 -2.24 26
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MBFT.HHN. ML:1.9 0.00014108120000000003 0.512 AML other m 2018-04-06T21:16:13.41
IV.MBFT.HHE. ML:1.8 0.00009403054500000001 0.2432 AML other m 2018-04-06T21:16:13.96
IV.MPG.SHE. ML:0.0 0.000034552175 0.4352 AML other m 2018-04-06T21:16:16.41
IV.MPG.SHN. ML:0.0 0.000037645885 0.2304 AML other m 2018-04-06T21:16:16.81
IV.MMGO.HHN. ML:1.3 0.000021618704999999997 0.32 AML other m 2018-04-06T21:16:23.66
IV.MMGO.HHE. ML:1.4 0.00002342334 0.3328 AML other m 2018-04-06T21:16:25.06
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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