Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 31-10-2021 and time 21:54:59 (Italy) in region Isole Eolie (Messina)

A magnitude ML 1.8 earthquake occured in region: Isole Eolie (Messina), on

  • 31-10-2021 20:54:59 (UTC)
  • 31-10-2021 21:54:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 38.8320, 15.2260 at 4 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
77 Km NW of Messina (238439 inhabitants)
88 Km NW of Reggio di Calabria (183035 inhabitants)
96 Km W of Lamezia Terme (70714 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 1.8 2021-10-31
20:54:59		 38.8322 15.2258 4 2022-03-30
13:04:34		 Bollettino Sismico Italiano INGV 100486131
Reviewed
Rev200 		ML 2.1 2021-10-31
20:54:59		 38.814 15.203 1 2022-02-17
13:21:45		 Sala Operativa INGV_OE (Catania) 97119001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-31 20:54:59 ± 0.15
Latitude 38.8322 ± 0.0090
Longitude 15.2258 ± 0.0127
Depth (km) 4 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100486131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1250
Semi-minor axis of confidence ellipse (meter) 574
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 309
Circular confidence region, given by single value of horizontal uncertainty (meter) 1250.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.03327
Epicentral distance of station farthest from the epicenter (degree) 1.43712
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:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 100486131
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-17 13:21:32

ML:2.1

Field Value
Value 2.1
Uncertainty 2.1
Num. used stations
Type of magnitude ML
Reference to an origin 97119001
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-10-31 21:26:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAR1.HHZ. 2021-10-31T20:55:28.92 0.6 undecidable manual S 61 96.9252 50 -0.02 43
IV.SIRI.HNE. 2021-10-31T20:55:25.95 0.3 undecidable manual P 20 159.5181 50 -0.01 55
IV.MGR.HHZ. 2021-10-31T20:55:23.21 0.6 undecidable manual P 11 147.5412 50 -0.9 29
MN.TIP.HHN. 2021-10-31T20:55:22.34 0.3 undecidable manual P 73 137.5623 50 -0.25 56
IV.BULG.HHN. 2021-10-31T20:55:22.63 0.6 undecidable manual P 5 138.861 50 -0.15 38
IV.SERS.HNN. 2021-10-31T20:55:20.89 0.3 undecidable manual P 79 128.1717 50 -0.25 57
IV.SELL.HHZ. 2021-10-31T20:55:20.62 0.3 undecidable manual P 82 122.1888 50 0.41 56
IV.CELI.HHE. 2021-10-31T20:55:20.62 0.3 undecidable manual P 60 127.2726 50 -0.38 56
IV.JOPP.HHZ. 2021-10-31T20:55:19.48 0.3 undecidable manual S 113 62.2932 50 -0.23 65
IV.SPS2.HHE. 2021-10-31T20:55:19.02 0.3 undecidable manual P 62 108.5136 50 0.91 48
IV.GRIS.HNE. 2021-10-31T20:55:18.89 0.3 undecidable manual P 28 114.1968 50 -0.1 61
IV.PLAC.HHE. 2021-10-31T20:55:18.75 0.1 undecidable manual P 112 113.2977 50 -0.1 81
IV.IVUG.HHZ. 2021-10-31T20:55:17.84 0.6 undecidable manual S 203 52.7028 50 0.71 39
IV.GRI.EHN. 2021-10-31T20:55:17.19 0.3 undecidable manual P 90 103.2189 50 -0.1 62
IV.MSFR.HHZ. 2021-10-31T20:55:17.32 0.3 undecidable manual P 212 104.3178 50 -0.14 61
IV.CET2.HHZ. 2021-10-31T20:55:17.14 0.3 undecidable manual P 39 99.5226 50 0.43 58
IV.MUCR.HHE. 2021-10-31T20:55:16.40 0.3 undecidable manual P 199 92.7405 50 0.72 53
IV.CAR1.HHZ. 2021-10-31T20:55:16.49 0.3 undecidable manual P 61 96.9252 50 0.17 62
IV.GIZZ.HHZ. 2021-10-31T20:55:15.05 0.6 undecidable manual P 79 86.3469 50 0.36 41
IV.FERC.HHN.00 2021-10-31T20:55:15.37 0.6 undecidable manual P 118 88.7445 50 0.3 41
MN.CEL.HNZ. 2021-10-31T20:55:14.42 0.6 undecidable manual P 137 85.9473 50 -0.2 42
IV.IACL.HHE. 2021-10-31T20:55:13.93 0.6 undecidable manual P 247 82.3509 50 -0.15 43
IV.MPNC.HHN. 2021-10-31T20:55:12.80 0.3 undecidable manual P 172 76.8675 50 -0.43 61
IV.IVPL.HNE. 2021-10-31T20:55:11.18 0.3 undecidable manual P 203 54.9006 50 1.34 43
IV.ILOS.HHZ. 2021-10-31T20:55:10.29 0.6 undecidable manual P 209 49.1175 50 1.33 29
IV.JOPP.HHZ. 2021-10-31T20:55:10.88 0.3 undecidable manual P 113 62.2932 50 -0.11 67
IV.MILZ.HHN. 2021-10-31T20:55:10.64 0.3 undecidable manual P 180 62.1933 50 -0.33 64
IV.IVUG.HHZ. 2021-10-31T20:55:08.70 0.3 undecidable manual P 203 52.7028 50 -0.8 56
IV.IVGP.HHN. 2021-10-31T20:55:08.44 0.3 undecidable manual P 206 53.502 50 -1.19 46
IV.IST3.HHZ. 2021-10-31T20:55:01.01 0.6 undecidable manual S 174 3.6963 138 0 51
IV.ISTR.HHZ. 2021-10-31T20:55:01.26 0.6 undecidable manual S 210 5.8941 125 -0.31 47
IV.IST3.HHZ. 2021-10-31T20:55:00.45 0.1 undecidable manual P 174 3.6963 138 0.26 96
IV.ISTR.HHZ. 2021-10-31T20:55:00.46 0.1 undecidable manual P 210 5.8941 125 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.JOPP.HNE. ML:1.8 0.00013146740000000002 0.3712 AML other m 2021-10-31T20:55:20.53
IV.JOPP.HHE. ML:1.8 0.00013247636 0.3584 AML other m 2021-10-31T20:55:20.53
IV.JOPP.HHN. ML:1.8 0.00012027405 0.2176 AML other m 2021-10-31T20:55:20.28
IV.JOPP.HNN. ML:1.8 0.000123034545 0.256 AML other m 2021-10-31T20:55:20.27
IV.CAR1.HHN. ML:1.8 0.00006884274 0.32 AML other m 2021-10-31T20:55:32.83
IV.CAR1.HHE. ML:1.9 0.0000917 0.44 AML other m 2021-10-31T20:55:38.45
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
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