Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.5 on date 22-12-2018 and time 10:32:18 (UTC) in region Tirreno Meridionale (MARE)

A magnitude ML 2.5 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 22-12-2018 10:32:18 (UTC)
  • 22-12-2018 11:32:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 38.4180, 12.7450 at 8 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.

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Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km NE of Trapani (68759 inhabitants)
64 Km NW of Palermo (674435 inhabitants)
74 Km NE of Marsala (83194 inhabitants)
77 Km NW of Bagheria (55387 inhabitants)
86 Km N of Mazara del Vallo (51718 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 2.5 2018-12-22
10:32:18		 38.4183 12.7447 8 2019-06-04
09:16:08		 Bollettino Sismico Italiano INGV 65075511
Reviewed
Rev100 		ML 2.5 2018-12-22
10:32:17		 38.3758 12.7582 2 2018-12-22
10:54:35		 Sala Sismica INGV-Roma 64082291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-22 10:32:18 ± 0.49
Latitude 38.4183 ± 0.0198
Longitude 12.7447 ± 0.0356
Depth (km) 8 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 65075511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3380
Semi-minor axis of confidence ellipse (meter) 1820
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 297
Circular confidence region, given by single value of horizontal uncertainty (meter) 3380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 211
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.68
Epicentral distance of station closest to the epicenter (degree) 0.40020
Epicentral distance of station farthest from the epicenter (degree) 2.22942
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.3
Num. used stations 23
Type of magnitude ML
Reference to an origin 65075511
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-01-30 11:13:13

ML:2.5

Field Value
Value 2.5
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 64082291
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-22 10:54:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HLNI.HHZ. 2018-12-22T10:33:17.90 0.6 undecidable manual S 122 220.9122 38 -0.77 23
IV.RAFF.HHZ. 2018-12-22T10:33:14.10 0.6 undecidable manual S 133 194.1612 38 1.19 22
IV.CSLB.HHZ. 2018-12-22T10:32:57.30 0.6 undecidable manual S 115 126.3735 50 1.68 22
IV.SSY.HHZ. 2018-12-22T10:32:55.91 0.6 undecidable manual P 124 247.4634 38 -0.75 19
IV.HLNI.HHZ. 2018-12-22T10:32:52.33 0.3 undecidable manual P 122 220.9122 38 -1.01 31
MN.CLTB.HHZ. 2018-12-22T10:32:51.00 0.3 undecidable manual S 156 101.9202 50 1.9 29
IV.RAFF.HHZ. 2018-12-22T10:32:49.40 0.3 undecidable manual P 133 194.1612 38 -0.62 43
IV.MARS.EHZ. 2018-12-22T10:32:43.00 0.6 undecidable manual S 192 75.4689 50 0.97 36
IV.PETRA.HHZ. 2018-12-22T10:32:42.38 0.3 undecidable manual P 118 136.0638 50 0.85 50
IV.CRJA.HHZ. 2018-12-22T10:32:42.70 0.3 undecidable manual S 162 72.0723 50 1.57 39
IV.ALJA.HHZ. 2018-12-22T10:32:38.07 0.3 undecidable manual P 130 115.1958 50 -0.25 64
IV.CSLB.HHZ. 2018-12-22T10:32:38.67 0.1 undecidable manual P 115 126.3735 50 -1.36 53
IV.MPG.SHZ. 2018-12-22T10:32:37.80 0.3 undecidable manual S 118 60.6948 50 -0.29 70
MN.CLTB.HHZ. 2018-12-22T10:32:36.87 0.1 undecidable manual P 156 101.9202 50 0.6 80
IV.USI.HHZ. 2018-12-22T10:32:36.50 0.1 undecidable manual S 49 49.5171 50 1.39 60
IV.MBFT.HHZ. 2018-12-22T10:32:35.10 0.3 undecidable manual S 161 55.5 50 -1.6 40
IV.CAVT.HHZ. 2018-12-22T10:32:34.45 0.3 undecidable manual P 179 82.0512 50 1.24 47
IV.MFNL.HHZ. 2018-12-22T10:32:32.05 0.3 undecidable manual P 167 71.373 50 0.49 66
IV.MARS.EHZ. 2018-12-22T10:32:32.42 0.3 undecidable manual P 192 75.4689 50 0.23 69
IV.CRJA.HHZ. 2018-12-22T10:32:31.41 0.1 undecidable manual P 162 72.0723 50 -0.26 92
IV.CORL.HHZ. 2018-12-22T10:32:31.98 0.3 undecidable manual P 140 75.8685 50 -0.28 69
IV.USI.HHZ. 2018-12-22T10:32:28.11 0.1 negative manual P 49 49.5171 50 -0.09 100
IV.MBFT.HHZ. 2018-12-22T10:32:28.05 0.3 undecidable manual P 161 55.5 50 -1.06 53
IV.MPG.SHZ. 2018-12-22T10:32:28.57 0.1 negative manual P 118 60.6948 50 -1.35 61
IV.ERC.EHZ. 2018-12-22T10:32:26.00 0.6 undecidable manual P 198 44.4222 50 -1.41 30
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ERC.EHN. ML:2.4 0.00080586985 0.2368 AML other m 2018-12-22T10:32:36.39
IV.ERC.EHE. ML:2.4 0.00069860995 0.1984 AML other m 2018-12-22T10:32:33.74
IV.MBFT.HNE. ML:2.0 0.0002108644 0.3456 AML other m 2018-12-22T10:32:38.04
IV.MBFT.HNN. ML:1.9 0.00016932585 0.4608 AML other m 2018-12-22T10:32:38.59
IV.MBFT.HHE. ML:2.8 0.001545435 0.3584 AML other m 2018-12-22T10:32:38.04
IV.MBFT.HHN. ML:2.6 0.0010314008 0.3776 AML other m 2018-12-22T10:32:37.64
IV.CRJA.HHN. ML:2.7 0.0007711121 0.3008 AML other m 2018-12-22T10:32:43.28
IV.CRJA.HHE. ML:2.6 0.0006500731500000001 0.544 AML other m 2018-12-22T10:32:43.59
IV.CORL.HHN. ML:2.7 0.0007236578499999999 0.3584 AML other m 2018-12-22T10:32:49.64
IV.CORL.HHE. ML:2.9 0.0011232644999999999 0.2816 AML other m 2018-12-22T10:32:45.31
IV.MARS.EHE. ML:2.4 0.00033414355 0.4992 AML other m 2018-12-22T10:32:49.80
IV.MARS.EHN. ML:2.2 0.00023841875000000002 0.2176 AML other m 2018-12-22T10:32:44.77
IV.CAVT.HHE. ML:2.5 0.00042729865 0.48 AML other m 2018-12-22T10:32:47.00
MN.CLTB.HHE. ML:3.2 0.0014000175 0.4992 AML other m 2018-12-22T10:32:54.97
IV.ALJA.HHE. ML:2.7 0.000386058 0.3968 AML other m 2018-12-22T10:32:57.77
IV.ALJA.HHN. ML:2.6 0.0002812968 0.4608 AML other m 2018-12-22T10:33:09.18
IV.PETRA.HHE. ML:2.5 0.0002110502 0.7424 AML other m 2018-12-22T10:33:11.90
IV.PETRA.HHN. ML:2.6 0.00021317415 0.6016 AML other m 2018-12-22T10:33:08.64
IV.RAFF.HHN. ML:2.4 0.00007999666999999999 0.64 AML other m 2018-12-22T10:33:22.61
IV.RAFF.HHE. ML:2.3 0.00006022983499999999 0.4608 AML other m 2018-12-22T10:33:17.96
IV.HLNI.HHE. ML:2.2 0.000040591605 0.48 AML other m 2018-12-22T10:33:35.95
IV.HLNI.HHN. ML:2.4 0.000053569160000000006 0.3392 AML other m 2018-12-22T10:33:19.07
IV.SSY.HHN. ML:3.2 0.0003422131 0.224 AML other m 2018-12-22T10:33:29.97
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
Waveforms Seismic signals in miniseed + resp format Download