Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 21-12-2017 and time 01:21:05 (Italy) in region 1 km E Torrenova (ME)

A magnitude ML 2.1 earthquake occured in region: 1 km E Torrenova (ME), on

  • 21-12-2017 00:21:05 (UTC)
  • 21-12-2017 01:21:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 38.0900, 14.6850 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Torrenova ME 1 4386 4386
San Marco d'Alunzio ME 2 1996 6382
Capri Leone ME 3 4515 10897
Militello Rosmarino ME 5 1324 12221
Sant'Agata di Militello ME 5 12624 24845
Frazzanò ME 6 711 25556
Mirto ME 6 974 26530
Alcara li Fusi ME 8 1980 28510
San Salvatore di Fitalia ME 8 1319 29829
Longi ME 9 1473 31302
Acquedolci ME 9 5744 37046
Capo d'Orlando ME 10 13254 50300
Naso ME 10 3813 54113
Galati Mamertino ME 10 2627 56740
Castell'Umberto ME 11 3128 59868
San Fratello ME 12 3707 63575
Ficarra ME 13 1469 65044
Tortorici ME 14 6435 71479
Sinagra ME 15 2705 74184
Brolo ME 15 5783 79967
Sant'Angelo di Brolo ME 18 3090 83057
Piraino ME 18 3962 87019
Ucria ME 18 1058 88077

Municipalities with at least 50000 inhabitants

An earthquake occurred to
68 Km NW of Acireale (52622 inhabitants)
74 Km NW of Catania (314555 inhabitants)
77 Km W of Messina (238439 inhabitants)
84 Km W of Reggio di Calabria (183035 inhabitants)
86 Km NE of Caltanissetta (63360 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 2.1 2017-12-21
00:21:05		 38.0903 14.685 8 2018-09-04
09:10:40		 Bollettino Sismico Italiano INGV 53118461
Reviewed
Rev100 		ML 2.1 2017-12-21
00:21:05		 38.1012 14.6887 6 2017-12-21
00:30:18		 Sala Sismica INGV-Roma 52707101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-12-21 00:21:05 ± 0.08
Latitude 38.0903 ± 0.0045
Longitude 14.6850 ± 0.0046
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 53118461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 471
Semi-minor axis of confidence ellipse (meter) 407
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 187
Circular confidence region, given by single value of horizontal uncertainty (meter) 470.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.09263
Epicentral distance of station farthest from the epicenter (degree) 0.66999
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 30
Type of magnitude ML
Reference to an origin 52707101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-12-21 00:30:18

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 53118461
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-01-11 09:46:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MILZ.HHZ. 2017-12-21T00:21:23.13 0.6 undecidable manual S 67 51.7038 50 0.41 43
IV.AIO.HHZ. 2017-12-21T00:21:22.40 0.6 undecidable manual S 105 49.7169 50 0.22 45
IV.IVPL.HHZ. 2017-12-21T00:21:20.07 0.6 undecidable manual S 39 40.8258 50 0.25 45
IV.IVGP.HHZ. 2017-12-21T00:21:20.10 0.6 undecidable manual S 35 41.625 50 0.07 47
IV.NOV.HHZ. 2017-12-21T00:21:19.51 0.6 undecidable manual S 100 40.0266 50 -0.1 47
IV.EMSG.HHZ. 2017-12-21T00:21:18.96 1.0 undecidable manual S 142 37.8288 50 -0.05 24
IV.MSRU.HHZ. 2017-12-21T00:21:18.79 0.6 undecidable manual P 75 74.37 50 -0.21 43
IV.EPZF.HHZ. 2017-12-21T00:21:17.92 0.3 undecidable manual S 153 33.1446 103 0.46 66
IV.CSLB.HHZ. 2017-12-21T00:21:16.41 1.0 undecidable manual P 253 57.3981 50 0.03 23
IV.GIB.HHZ. 2017-12-21T00:21:16.92 0.6 undecidable manual P 259 58.5969 50 0.34 43
IV.PETRA.HHZ. 2017-12-21T00:21:16.20 0.3 undecidable manual P 240 57.3981 50 -0.19 66
IV.IACL.HHZ. 2017-12-21T00:21:16.42 0.1 negative manual P 330 56.8986 50 0.11 90
IV.MILZ.HHZ. 2017-12-21T00:21:15.22 0.3 undecidable manual P 67 51.7038 50 -0.29 66
IV.ILLI.HHZ. 2017-12-21T00:21:15.20 0.3 undecidable manual P 30 45.621 50 0.63 60
IV.AIO.HHZ. 2017-12-21T00:21:14.72 0.1 positive manual P 105 49.7169 50 -0.48 85
IV.PLLN.EHZ. 2017-12-21T00:21:14.93 0.3 undecidable manual P 257 48.618 50 -0.1 69
IV.GALF.HHZ. 2017-12-21T00:21:14.17 0.1 undecidable manual P 194 43.3233 50 -0.06 93
IV.NOV.HHZ. 2017-12-21T00:21:13.21 0.1 undecidable manual P 100 40.0266 50 -0.51 85
IV.EMSG.HHZ. 2017-12-21T00:21:13.64 0.1 undecidable manual P 142 37.8288 50 0.27 90
IV.IVGP.HHZ. 2017-12-21T00:21:13.80 0.1 undecidable manual P 35 41.625 50 -0.16 92
IV.IVPL.HHZ. 2017-12-21T00:21:13.88 0.1 positive manual P 39 40.8258 50 0.04 94
IV.MUCR.HHZ. 2017-12-21T00:21:12.19 0.3 undecidable manual S 108 17.2716 113 -0.03 74
IV.EPZF.HHZ. 2017-12-21T00:21:12.63 0.1 undecidable manual P 153 33.1446 103 0.15 93
IV.MSFR.HHZ. 2017-12-21T00:21:10.01 0.3 undecidable manual S 233 10.2786 126 -0.08 74
IV.MUCR.HHZ. 2017-12-21T00:21:09.32 0.1 undecidable manual P 108 17.2716 113 -0.13 96
IV.MSFR.HHZ. 2017-12-21T00:21:08.21 0.1 negative manual P 233 10.2786 126 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MSFR.HHN. ML:2.5 0.00423 0.22 AML other m 2017-12-21T00:21:10.37
IV.MSFR.HHE. ML:2.3 0.002785 0.24 AML other m 2017-12-21T00:21:10.28
IV.MUCR.HHN. ML:2.1 0.001086 0.38 AML other m 2017-12-21T00:21:13.35
IV.MUCR.HHE. ML:2.3 0.0017900000000000001 0.94 AML other m 2017-12-21T00:21:13.29
IV.NOV.HHE. ML:1.9 0.0003015 0.16 AML other m 2017-12-21T00:21:21.82
IV.EPZF.HHE. ML:2.2 0.0006699999999999999 0.58 AML other m 2017-12-21T00:21:22.52
IV.IVGP.HHE. ML:2.1 0.00038649999999999996 0.24 AML other m 2017-12-21T00:21:22.74
IV.IVPL.HHN. ML:2.3 0.000789 1.36 AML other m 2017-12-21T00:21:22.95
IV.EMSG.HHE. ML:2.4 0.0009285 0.88 AML other m 2017-12-21T00:21:23.84
IV.EPZF.HHN. ML:2.3 0.0008525000000000001 0.9 AML other m 2017-12-21T00:21:23.52
IV.MILZ.HHE. ML:2.1 0.000308 1.56 AML other m 2017-12-21T00:21:24.21
IV.NOV.HHN. ML:1.9 0.00029549999999999997 0.8 AML other m 2017-12-21T00:21:24.05
IV.AIO.HHE. ML:1.9 0.000217 0.36 AML other m 2017-12-21T00:21:24.54
IV.IVGP.HHN. ML:2.1 0.00038500000000000003 0.38 AML other m 2017-12-21T00:21:24.98
IV.MILZ.HHN. ML:1.9 0.00022250000000000001 0.5 AML other m 2017-12-21T00:21:25.37
IV.AIO.HHN. ML:2.0 0.00023799999999999998 1.2 AML other m 2017-12-21T00:21:25.67
IV.EMSG.HHN. ML:2.3 0.0007224999999999999 0.44 AML other m 2017-12-21T00:21:25.93
IV.IVPL.HHE. ML:2.2 0.000624 0.86 AML other m 2017-12-21T00:21:25.54
IV.PLLN.EHN. ML:2.2 0.0004275 1.64 AML other m 2017-12-21T00:21:26.02
IV.IACL.HHE. ML:2.4 0.0005420000000000001 0.26 AML other m 2017-12-21T00:21:26.27
IV.PLLN.EHE. ML:2.2 0.0003985 1.32 AML other m 2017-12-21T00:21:27.19
IV.GALF.HHE. ML:1.8 0.0002205 0.56 AML other m 2017-12-21T00:21:28.20
IV.IACL.HHN. ML:2.4 0.0005834999999999999 0.32 AML other m 2017-12-21T00:21:28.27
IV.PETRA.HHE. ML:1.8 0.00013350000000000002 1.4 AML other m 2017-12-21T00:21:30.12
IV.MSRU.HHE. ML:2.0 0.0001645 0.68 AML other m 2017-12-21T00:21:30.59
IV.MSRU.HHN. ML:1.9 0.000128 0.8 AML other m 2017-12-21T00:21:30.93
IV.GALF.HHN. ML:1.8 0.000213 1.22 AML other m 2017-12-21T00:21:33.65
IV.PETRA.HHN. ML:1.8 0.00014250000000000002 0.36 AML other m 2017-12-21T00:21:33.80
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