Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 23-05-2018 and time 09:14:53 (Italy) in region Tirreno Meridionale (MARE)

A magnitude ML 2.3 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 23-05-2018 07:14:53 (UTC)
  • 23-05-2018 09:14:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.6840, 13.4790 at 7 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
64 Km N of Palermo (674435 inhabitants)
67 Km N 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 2.3 2018-05-23
07:14:53		 38.6838 13.4792 7 2019-04-24
14:51:11		 Bollettino Sismico Italiano INGV 66507521
Reviewed
Rev100 		ML 2.4 2018-05-23
07:14:53		 38.6852 13.4797 7 2018-05-23
07:37:20		 Sala Sismica INGV-Roma 57150361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-23 07:14:53 ± 0.29
Latitude 38.6838 ± 0.0396
Longitude 13.4792 ± 0.0242
Depth (km) 7 ± 6 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 66507521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 4593
Semi-minor axis of confidence ellipse (meter) 1278
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 336
Circular confidence region, given by single value of horizontal uncertainty (meter) 4590.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 182
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.98566
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 66507521
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-03-13 13:11:13

ML:2.4

Field Value
Value 2.4
Uncertainty 0.4
Num. used stations 7
Type of magnitude ML
Reference to an origin 57150361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-23 07:37:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BRSN.HNZ. 2018-05-23T07:16:35.33 3.0 positive manual Pg 15.48 0
CR.STON.BHZ. 2018-05-23T07:16:31.84 3.0 undecidable manual Pg 15.56 0
IV.CAVE.HHZ. 2018-05-23T07:16:31.55 3.0 negative manual Pn 1.7 0
IV.ASQU.HHZ. 2018-05-23T07:16:19.09 3.0 negative manual Pn 5.32 0
IV.CRTO.HHZ. 2018-05-23T07:16:07.56 3.0 undecidable manual Sg 1.21 0
IV.MIGL.HHZ. 2018-05-23T07:15:49.33 3.0 undecidable manual Pg 4.11 0
IV.FIAM.HHZ. 2018-05-23T07:15:48.73 3.0 positive manual Pn -2.67 0
IV.MBFT.HNZ. 2018-05-23T07:15:21.69 1.0 undecidable manual S 209 93.7395 50 0.25 21
IV.SOLUN.HHZ. 2018-05-23T07:15:14.39 0.6 undecidable manual S 176 65.7897 50 0.41 44
IV.PETRA.HHZ. 2018-05-23T07:15:12.15 0.6 undecidable manual P 149 109.4127 50 0.29 41
IV.MPG.SHZ. 2018-05-23T07:15:11.74 0.6 undecidable manual S 190 58.8966 50 -0.38 44
IV.PLLN.EHZ. 2018-05-23T07:15:10.10 0.6 undecidable manual P 143 96.0261 50 0.31 42
IV.CSLB.HHZ. 2018-05-23T07:15:09.48 0.1 undecidable manual P 149 96.9252 50 -0.45 81
IV.IFIL.HHN. 2018-05-23T07:15:09.22 0.3 undecidable manual P 98 95.9262 50 -0.56 59
IV.MBFT.HNZ. 2018-05-23T07:15:09.60 0.6 undecidable manual P 209 93.7395 50 0.15 44
IV.CORL.HHZ. 2018-05-23T07:15:09.15 0.6 undecidable manual P 190 88.9443 50 0.45 41
IV.IACL.HHZ. 2018-05-23T07:15:07.57 0.3 undecidable manual P 102 77.7666 50 0.59 60
IV.SOLUN.HHZ. 2018-05-23T07:15:05.42 0.6 undecidable manual P 176 65.7897 50 0.28 45
IV.MPG.SHZ. 2018-05-23T07:15:03.42 0.3 undecidable manual P 190 58.8966 50 -0.65 61
IV.USI.HHZ. 2018-05-23T07:15:02.36 0.6 undecidable manual S 276 26.1516 105 -0.1 50
IV.USI.HHZ. 2018-05-23T07:14:58.59 0.1 undecidable manual P 276 26.1516 105 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.USI.HHN. ML:2.8 0.003964069000000001 0.2208 AML other m 2018-05-23T07:15:03.80
IV.USI.HHE. ML:2.3 0.0012708965 0.1216 AML other m 2018-05-23T07:15:04.38
IV.MPG.SHE. ML:0.0 0.00033705485 0.2368 AML other m 2018-05-23T07:15:12.76
IV.MPG.SHN. ML:0.0 0.00033501045 0.1984 AML other m 2018-05-23T07:15:14.36
IV.SOLUN.HHN. ML:1.8 0.00012227874999999998 0.3584 AML other m 2018-05-23T07:15:17.23
IV.PETRA.HHE. ML:2.6 0.0003215 1.5 AML other m 2018-05-23T07:15:32.02
IV.PETRA.HHN. ML:2.4 0.0001945 0.44 AML other m 2018-05-23T07:15:34.47
IV.SOLUN.HHE. ML:1.9 0.00013628974999999998 0.4192 AML other m 2018-05-23T07:15:18.09
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