Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.5 on date 18-10-2021 and time 10:03:36 (Italy) in region Tirreno Meridionale (MARE)

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

  • 18-10-2021 08:03:36 (UTC)
  • 18-10-2021 10:03:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.4990, 13.5050 at 22 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
44 Km N of Palermo (674435 inhabitants)
47 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 2.5 2021-10-18
08:03:36		 38.4988 13.5047 22 2022-03-30
13:04:12		 Bollettino Sismico Italiano INGV 96838101
Reviewed
Rev100 		ML 2.6 2021-10-18
08:03:36		 38.449 13.4938 1 2021-10-18
08:16:10		 Sala Sismica INGV-Roma 96717591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-18 08:03:36 ± 0.16
Latitude 38.4988 ± 0.0108
Longitude 13.5047 ± 0.0126
Depth (km) 22 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96838101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1141
Semi-minor axis of confidence ellipse (meter) 612
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 34
Circular confidence region, given by single value of horizontal uncertainty (meter) 1140.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.46
Epicentral distance of station closest to the epicenter (degree) 0.32915
Epicentral distance of station farthest from the epicenter (degree) 4.23671
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 28
Magnitudes information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 96838101
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-16 14:04:20

ML:2.6

Field Value
Value 2.6
Uncertainty 0.3
Num. used stations 48
Type of magnitude ML
Reference to an origin 96717591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-18 08:16:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.AGLI.HHZ. 2021-10-18T08:04:40.20 0.3 undecidable manual P 310 470.2737 54 -0.62 15
IV.BULT.EHZ. 2021-10-18T08:04:36.51 0.3 undecidable manual P 302 442.4238 54 -0.84 14
MN.VSL.HHZ. 2021-10-18T08:04:26.77 0.3 undecidable manual P 289 372.5493 54 -1.88 8
IV.MARS.HHZ. 2021-10-18T08:04:11.74 0.6 undecidable manual S 225 116.4945 96 1.4 29
IV.HMDC.HHZ. 2021-10-18T08:04:08.08 0.3 undecidable manual P 146 204.3399 54 0.36 45
IV.SSY.HHZ. 2021-10-18T08:04:07.31 0.6 undecidable manual P 137 202.5417 54 -0.19 31
IV.HVIT.HHZ. 2021-10-18T08:04:06.55 0.3 undecidable manual P 152 189.366 54 0.69 44
IV.HVZN.HHZ. 2021-10-18T08:04:05.41 0.3 undecidable manual P 144 180.8856 54 0.61 47
IV.HLNI.HHZ. 2021-10-18T08:04:04.03 0.3 undecidable manual P 136 174.8916 54 -0.03 57
IV.RAFF.HHZ. 2021-10-18T08:04:03.34 0.3 undecidable manual P 152 160.3173 54 1.1 42
IV.MPNC.HHZ. 2021-10-18T08:04:02.38 0.3 undecidable manual P 103 165.5121 54 -0.51 54
IV.CSLB.HHZ. 2021-10-18T08:04:00.26 0.6 undecidable manual S 142 78.7656 99 -0.1 49
IV.EPZF.HHZ. 2021-10-18T08:04:00.58 0.6 undecidable manual P 122 139.7601 95 0.92 32
IV.MBFT.HHZ. 2021-10-18T08:03:59.92 0.6 undecidable manual S 218 77.8665 99 -0.21 46
IV.GIB.HHZ. 2021-10-18T08:03:59.62 0.6 undecidable manual S 141 72.4719 100 0.93 37
IV.IVUG.HHZ. 2021-10-18T08:03:58.00 0.6 undecidable manual P 95 129.1707 95 -0.05 44
IV.SCIAR.HHZ. 2021-10-18T08:03:57.37 0.6 undecidable manual S 161 65.49 101 0.5 45
IV.MUCR.HHZ. 2021-10-18T08:03:57.52 0.3 undecidable manual P 113 129.5703 95 -0.58 59
IV.IVPL.HNE. 2021-10-18T08:03:57.17 0.6 undecidable manual P 96 128.871 95 -0.84 36
IV.MARS.HHZ. 2021-10-18T08:03:56.89 0.3 undecidable manual P 225 116.4945 96 0.79 56
IV.MCPD.HHZ. 2021-10-18T08:03:55.38 0.3 undecidable manual P 111 114.6963 96 -0.45 63
IV.MSFR.HHZ. 2021-10-18T08:03:54.56 0.3 undecidable manual P 118 107.8143 96 -0.21 67
IV.ALJA.HHZ. 2021-10-18T08:03:52.14 0.1 negative manual P 165 85.9473 98 0.71 80
IV.ERC.EHE. 2021-10-18T08:03:52.24 0.3 undecidable manual P 238 94.8384 97 -0.55 62
IV.MTGR.HHE. 2021-10-18T08:03:52.61 0.3 undecidable manual P 224 93.4398 98 0.04 71
IV.IFIL.HHZ. 2021-10-18T08:03:52.53 0.3 undecidable manual P 85 93.24 98 0 71
IV.CSLB.HHZ. 2021-10-18T08:03:50.20 0.1 negative manual P 142 78.7656 99 -0.13 96
IV.USI.HHZ. 2021-10-18T08:03:50.06 0.6 undecidable manual S 310 36.5412 113 0.61 47
IV.SOLUN.HHZ. 2021-10-18T08:03:50.87 0.6 undecidable manual S 177 45.2214 108 -0.76 42
IV.MBFT.HHZ. 2021-10-18T08:03:50.22 0.3 undecidable manual P 218 77.8665 99 0.02 73
IV.GIB.HHZ. 2021-10-18T08:03:49.49 0.1 negative manual P 141 72.4719 100 0.12 97
IV.SCIAR.HHZ. 2021-10-18T08:03:48.97 0.3 undecidable manual P 161 65.49 101 0.65 64
IV.MPG.HHZ. 2021-10-18T08:03:47.98 0.6 undecidable manual S 199 39.4272 111 -2.2 16
IV.USI.HHZ. 2021-10-18T08:03:44.36 0.1 undecidable manual P 310 36.5412 113 0.32 100
IV.SOLUN.HHZ. 2021-10-18T08:03:44.41 0.1 undecidable manual P 177 45.2214 108 -0.88 80
IV.MPG.HHZ. 2021-10-18T08:03:43.27 0.1 negative manual P 199 39.4272 111 -1.19 69
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MPG.HHN. ML:2.7 0.0017417555 0.224 AML other m 2021-10-18T08:03:48.81
IV.MPG.HHE. ML:2.6 0.0011824895 0.16 AML other m 2021-10-18T08:03:48.76
IV.USI.HHE. ML:2.8 0.0019735685 0.416 AML other m 2021-10-18T08:03:51.37
IV.SOLUN.HHN. ML:2.6 0.0010714675 0.3008 AML other m 2021-10-18T08:03:51.46
IV.SOLUN.HHE. ML:2.7 0.00126682 0.48 AML other m 2021-10-18T08:03:51.18
IV.USI.HHN. ML:3.4 0.0077011745000000005 0.6976 AML other m 2021-10-18T08:03:51.60
IV.SCIAR.HHN. ML:2.2 0.00027812845 0.224 AML other m 2021-10-18T08:03:57.88
IV.SCIAR.HHE. ML:2.4 0.0004323142 0.2048 AML other m 2021-10-18T08:03:58.01
IV.SCIAR.HNE. ML:2.6 0.0007421847 1.3504 AML other m 2021-10-18T08:03:58.70
IV.SCIAR.HNN. ML:2.6 0.0006670048500000001 0.608 AML other m 2021-10-18T08:03:58.52
IV.CSLB.HHN. ML:2.0 0.00012475927 0.3584 AML other m 2021-10-18T08:04:00.63
IV.MBFT.HHE. ML:2.3 0.00025748214999999996 0.2624 AML other m 2021-10-18T08:04:01.05
IV.MBFT.HHN. ML:2.1 0.00016283115 0.3776 AML other m 2021-10-18T08:04:01.20
IV.MCPD.HHE. ML:2.1 0.00009455659499999999 0.4352 AML other m 2021-10-18T08:04:09.86
IV.MCPD.HHN. ML:2.1 0.00010124738999999999 0.3008 AML other m 2021-10-18T08:04:10.35
IV.MARS.HHN. ML:2.1 0.00010063937000000001 0.736 AML other m 2021-10-18T08:04:12.46
IV.MARS.HNN. ML:2.1 0.000100387235 0.7552 AML other m 2021-10-18T08:04:12.48
IV.MARS.HHE. ML:2.3 0.00015388019 0.9344 AML other m 2021-10-18T08:04:13.03
IV.MUCR.HHE. ML:2.1 0.00008603319000000001 0.2432 AML other m 2021-10-18T08:04:14.72
IV.MUCR.HHN. ML:2.3 0.0001199839 0.3392 AML other m 2021-10-18T08:04:15.01
IV.EPZF.HHE. ML:2.7 0.0002959433 0.48 AML other m 2021-10-18T08:04:22.04
IV.EPZF.HHN. ML:2.6 0.00024538325 0.4032 AML other m 2021-10-18T08:04:22.73
IV.RAFF.HHE. ML:2.8 0.00030649999999999997 0.98 AML other m 2021-10-18T08:04:25.67
IV.HLNI.HHE. ML:2.3 0.00006853955500000001 1.1776 AML other m 2021-10-18T08:04:26.14
IV.HLNI.HHN. ML:2.3 0.000068915275 0.4416 AML other m 2021-10-18T08:04:25.99
IV.RAFF.HHN. ML:2.8 0.00028649999999999997 0.68 AML other m 2021-10-18T08:04:25.44
IV.HVIT.HHN. ML:2.9 0.00024420700000000003 1.2416 AML other m 2021-10-18T08:04:29.62
IV.HVIT.HHE. ML:3.0 0.0002915 0.42 AML other m 2021-10-18T08:04:29.80
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
Waveforms Seismic signals in miniseed + resp format Download