Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 20-12-2017 and time 08:17:00 (Italy) in region 4 km W Visso (MC)

A magnitude ML 2.3 earthquake occured in region: 4 km W Visso (MC), on

  • 20-12-2017 07:17:00 (UTC)
  • 20-12-2017 08:17:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9370, 13.0440 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Visso MC 4 1107 1107
Preci PG 6 724 1831
Monte Cavallo MC 7 145 1976
Ussita MC 8 444 2420
Castelsantangelo sul Nera MC 10 281 2701
Sellano PG 11 1079 3780
Fiordimonte MC 12 202 3982
Pieve Torina MC 12 1458 5440
Fiastra MC 14 559 5999
Pievebovigliana MC 14 866 6865
Acquacanina MC 15 121 6986
Muccia MC 16 915 7901
Bolognola MC 16 142 8043
Norcia PG 17 4957 13000
Cerreto di Spoleto PG 17 1075 14075
Serravalle di Chienti MC 17 1070 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
53 Km NE of Terni (111501 inhabitants)
57 Km E of Perugia (166134 inhabitants)
62 Km NW of Teramo (54892 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
96 Km NE of Viterbo (67173 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 2017-12-20
07:17:00		 42.9372 13.0437 7 2019-03-25
14:09:22		 Bollettino Sismico Italiano INGV 62108711
Reviewed
Rev100 		ML 2.3 2017-12-20
07:17:00		 42.9425 13.0432 7 2017-12-20
07:33:27		 Sala Sismica INGV-Roma 52693731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-12-20 07:17:00 ± 0.06
Latitude 42.9372 ± 0.0027
Longitude 13.0437 ± 0.0049
Depth (km) 7 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 62108711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 414
Semi-minor axis of confidence ellipse (meter) 223
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 65
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 48
Number of associated phases, regardless of their use for origin computation 66
Number of defining phases 66
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.02518
Epicentral distance of station farthest from the epicenter (degree) 0.88943
Number of stations at which the event was observed 38
Number of stations from which data was used for origin computation 38
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 62108711
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-10-19 10:25:23

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 52693731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-12-20 07:33:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATVO.HHZ. 2017-12-20T07:17:23.18 0.3 undecidable manual S 314 71.373 50 0.73 56
IV.FRON.EHZ. 2017-12-20T07:17:22.63 0.6 undecidable manual S 338 69.375 50 0.72 37
IV.SSFR.HHZ. 2017-12-20T07:17:20.39 0.3 undecidable manual S 339 59.2962 50 1.16 47
IV.MURB.HHZ. 2017-12-20T07:17:19.13 0.3 undecidable manual S 311 55.4001 50 0.93 53
IV.TERO.HHN. 2017-12-20T07:17:18.43 0.6 undecidable manual S 127 57.3981 50 -0.3 43
IV.CESX.HHE. 2017-12-20T07:17:17.62 0.6 undecidable manual S 226 52.1034 50 0.31 44
IV.CAFI.HHZ. 2017-12-20T07:17:17.29 0.1 undecidable manual P 297 97.4247 50 0.28 81
IV.CAMP.HHZ. 2017-12-20T07:17:17.62 0.3 undecidable manual S 146 53.6019 50 -0.08 69
IV.T0110.HHZ. 2017-12-20T07:17:17.32 0.3 undecidable manual P 142 98.7234 50 0.12 63
IV.CING.HHZ. 2017-12-20T07:17:16.73 0.3 undecidable manual S 14 50.1165 50 -0.06 69
IV.FAGN.HHZ. 2017-12-20T07:17:16.63 0.3 undecidable manual P 149 86.5467 50 1.3 41
IV.RM33.HNE. 2017-12-20T07:17:16.51 0.6 undecidable manual S 164 49.5171 50 -0.11 46
IV.VCEL.EHZ. 2017-12-20T07:17:15.66 0.1 undecidable manual P 133 88.6446 50 0.02 87
IV.ATCC.EHZ. 2017-12-20T07:17:15.13 0.3 undecidable manual S 310 42.7239 50 0.31 67
IV.FOSV.EHZ. 2017-12-20T07:17:15.52 0.3 undecidable manual S 330 45.8208 50 -0.11 69
IV.ARRO.EHZ. 2017-12-20T07:17:15.96 0.6 undecidable manual S 210 45.7209 50 0.35 44
IV.SMA1.EHN. 2017-12-20T07:17:14.01 0.6 undecidable manual S 145 41.5251 50 -0.47 43
IV.ATPI.EHZ. 2017-12-20T07:17:13.79 0.3 undecidable manual P 318 77.0673 50 -0.07 66
IV.T1299.HNN. 2017-12-20T07:17:13.90 0.6 undecidable manual S 150 38.8278 100 0.17 46
IV.LNSS.HHZ. 2017-12-20T07:17:13.17 0.6 undecidable manual S 180 37.1295 101 0.03 48
IV.SNTG.HHE. 2017-12-20T07:17:12.95 0.6 undecidable manual S 347 36.2415 101 0.1 47
IV.MF5.EHN. 2017-12-20T07:17:12.92 0.6 undecidable manual S 80 34.2435 102 0.75 39
IV.FRON.EHZ. 2017-12-20T07:17:12.28 0.3 undecidable manual P 338 69.375 50 -0.39 63
IV.ATVO.HHZ. 2017-12-20T07:17:12.79 0.1 undecidable manual P 314 71.373 50 -0.19 87
IV.GAG1.HNE. 2017-12-20T07:17:12.12 0.6 undecidable manual S 3 33.4443 102 0.22 46
IV.PIEI.HHZ. 2017-12-20T07:17:12.94 0.3 undecidable manual P 328 78.0663 50 -1.08 47
IV.ARVD.HHZ. 2017-12-20T07:17:11.63 0.3 undecidable manual P 352 62.7927 50 -0.03 68
IV.TERO.HHN. 2017-12-20T07:17:10.39 0.1 undecidable manual P 127 57.3981 50 -0.44 84
IV.SSFR.HHZ. 2017-12-20T07:17:10.90 0.1 undecidable manual P 339 59.2962 50 -0.22 88
IV.MDAR.HNN. 2017-12-20T07:17:10.44 0.6 undecidable manual S 16 29.4483 103 -0.11 48
IV.MURB.HHZ. 2017-12-20T07:17:10.35 0.1 undecidable manual P 311 55.4001 50 -0.18 90
IV.OFFI.HHZ. 2017-12-20T07:17:10.77 0.1 undecidable manual P 90 52.1034 50 0.75 76
IV.GUMA.HHZ. 2017-12-20T07:17:10.60 0.3 undecidable manual S 59 27.4503 104 0.73 60
IV.CING.HHZ. 2017-12-20T07:17:09.26 0.1 positive manual P 14 50.1165 50 -0.46 85
IV.CAMP.HHZ. 2017-12-20T07:17:09.84 0.1 undecidable manual P 146 53.6019 50 -0.4 86
IV.RM33.HNE. 2017-12-20T07:17:09.19 0.1 undecidable manual P 164 49.5171 50 -0.42 86
IV.CESX.HHE. 2017-12-20T07:17:09.76 0.1 undecidable manual P 226 52.1034 50 -0.25 89
IV.FOSV.EHZ. 2017-12-20T07:17:09.02 0.1 undecidable manual P 330 45.8208 50 -0.02 94
IV.ARRO.EHZ. 2017-12-20T07:17:08.85 0.1 undecidable manual P 210 45.7209 50 -0.18 91
IV.PF6.EHN. 2017-12-20T07:17:08.93 0.6 undecidable manual S 29 25.3524 105 -0.25 46
IV.ATCC.EHZ. 2017-12-20T07:17:08.29 0.1 negative manual P 310 42.7239 50 -0.28 90
IV.SMA1.EHN. 2017-12-20T07:17:08.00 0.1 undecidable manual P 145 41.5251 50 -0.38 88
IV.MOMA.HNZ. 2017-12-20T07:17:08.14 0.1 undecidable manual P 249 41.2254 50 -0.2 91
IV.MMO1.EHN. 2017-12-20T07:17:08.57 0.6 undecidable manual S 100 23.3544 107 0.06 49
IV.LNSS.HHZ. 2017-12-20T07:17:07.37 0.1 undecidable manual P 180 37.1295 101 -0.23 91
IV.SEF1.HNN. 2017-12-20T07:17:07.76 0.6 undecidable manual S 342 24.5532 106 -1.13 34
IV.SNTG.HHE. 2017-12-20T07:17:07.27 0.3 undecidable manual P 347 36.2415 101 -0.17 70
IV.MF5.EHN. 2017-12-20T07:17:07.16 0.1 undecidable manual P 80 34.2435 102 0.12 94
IV.CSP1.EHZ. 2017-12-20T07:17:07.70 0.6 undecidable manual S 37 21.5673 108 -0.21 47
IV.T1299.HNN. 2017-12-20T07:17:07.97 0.1 undecidable manual P 150 38.8278 100 0.03 95
IV.GAG1.HNE. 2017-12-20T07:17:06.92 0.3 undecidable manual P 3 33.4443 102 0.03 72
IV.NRCA.HHZ. 2017-12-20T07:17:05.71 0.3 undecidable manual S 153 12.876 119 0.59 65
IV.GUMA.HHZ. 2017-12-20T07:17:05.88 0.1 positive manual P 59 27.4503 104 0.16 94
IV.CESI.HHE. 2017-12-20T07:17:05.85 0.3 undecidable manual S 304 13.5753 117 0.51 67
IV.SEF1.HNN. 2017-12-20T07:17:05.12 0.1 undecidable manual P 342 24.5532 106 -0.03 97
IV.PF6.EHN. 2017-12-20T07:17:05.08 0.1 undecidable manual P 29 25.3524 105 -0.24 93
IV.MDAR.HNN. 2017-12-20T07:17:05.83 0.3 undecidable manual P 16 29.4483 103 -0.28 69
IV.CSP1.EHZ. 2017-12-20T07:17:04.57 0.1 undecidable manual P 37 21.5673 108 -0.02 98
IV.FDMO.HHE. 2017-12-20T07:17:04.56 0.3 undecidable manual S 18 11.5773 121 -0.17 73
IV.MMO1.EHN. 2017-12-20T07:17:04.88 0.1 undecidable manual P 100 23.3544 107 -0.05 97
IV.NRCA.HHZ. 2017-12-20T07:17:03.40 0.1 undecidable manual P 153 12.876 119 0.43 92
IV.CESI.HHE. 2017-12-20T07:17:03.45 0.1 undecidable manual P 304 13.5753 117 0.35 93
IV.MC2.EHZ. 2017-12-20T07:17:03.16 0.1 undecidable manual P 104 12.1767 120 0.31 94
IV.FDMO.HHE. 2017-12-20T07:17:02.77 0.1 undecidable manual P 18 11.5773 121 0.02 100
IV.FEMA.HNN. 2017-12-20T07:17:01.79 0.6 undecidable manual S 10 2.7972 158 -0.87 39
IV.FEMA.HNN. 2017-12-20T07:17:01.35 0.1 undecidable manual P 10 2.7972 158 -0.2 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GUMA.HHN. ML:3.0 0.005215 0.26 AML other m 2017-12-20T07:17:10.83
IV.GUMA.HNE. ML:3.0 0.0056099999999999995 0.26 AML other m 2017-12-20T07:17:10.86
IV.GUMA.HHE. ML:3.0 0.00536 0.26 AML other m 2017-12-20T07:17:10.75
IV.GUMA.HNN. ML:2.9 0.00439 0.7 AML other m 2017-12-20T07:17:11.45
IV.ASSB.HHN. ML:2.7 0.0022299999999999998 0.24 AML other m 2017-12-20T07:17:12.14
IV.ASSB.HHE. ML:2.6 0.00178 0.32 AML other m 2017-12-20T07:17:12.17
IV.FOSV.EHE. ML:2.0 0.0002855 0.6 AML other m 2017-12-20T07:17:15.64
IV.FOSV.EHN. ML:2.2 0.0004515 0.62 AML other m 2017-12-20T07:17:17.52
IV.CAMP.HHE. ML:1.9 0.000209 1.32 AML other m 2017-12-20T07:17:18.80
IV.CING.HHE. ML:2.2 0.0003875 0.74 AML other m 2017-12-20T07:17:18.20
IV.CING.HHN. ML:2.1 0.000358 0.36 AML other m 2017-12-20T07:17:18.09
IV.MURB.HNN. ML:2.6 0.0009835 0.24 AML other m 2017-12-20T07:17:20.72
IV.CAMP.HHN. ML:2.0 0.000213 0.74 AML other m 2017-12-20T07:17:20.52
IV.MURB.HHN. ML:2.6 0.000883 1.58 AML other m 2017-12-20T07:17:21.04
IV.MURB.HNE. ML:2.8 0.001375 0.32 AML other m 2017-12-20T07:17:21.44
IV.MURB.HHE. ML:2.8 0.00143 0.34 AML other m 2017-12-20T07:17:21.43
IV.SSFR.HHN. ML:2.4 0.000611 0.42 AML other m 2017-12-20T07:17:22.59
IV.SSFR.HNN. ML:2.5 0.000732 0.42 AML other m 2017-12-20T07:17:22.59
IV.SSFR.HHE. ML:2.5 0.0006799999999999999 0.26 AML other m 2017-12-20T07:17:23.38
IV.SSFR.HNE. ML:2.5 0.000712 0.24 AML other m 2017-12-20T07:17:23.37
IV.ARVD.HHE. ML:2.0 0.00019 1.14 AML other m 2017-12-20T07:17:23.33
IV.ARVD.HHN. ML:1.9 0.00017199999999999998 0.66 AML other m 2017-12-20T07:17:23.35
IV.ATVO.HHE. ML:2.2 0.000266 0.34 AML other m 2017-12-20T07:17:25.11
IV.ATVO.HHN. ML:2.2 0.0002475 1.44 AML other m 2017-12-20T07:17:25.89
IV.OFFI.HHN. ML:2.4 0.0007325000000000001 0.48 AML other m 2017-12-20T07:17:25.46
IV.FRON.EHE. ML:2.0 0.000158 0.28 AML other m 2017-12-20T07:17:25.56
IV.OFFI.HHE. ML:2.3 0.0005745 0.66 AML other m 2017-12-20T07:17:27.31
IV.PIEI.HHN. ML:1.9 0.00010485 0.86 AML other m 2017-12-20T07:17:29.33
IV.PIEI.HHE. ML:2.1 0.0001735 1.24 AML other m 2017-12-20T07:17:30.19
IV.VCEL.EHN. ML:2.5 0.0003465 0.74 AML other m 2017-12-20T07:17:31.47
IV.FRON.EHN. ML:2.1 0.00023349999999999998 1.6 AML other m 2017-12-20T07:17:32.16
IV.T0110.HHE. ML:2.3 0.00021100000000000003 0.56 AML other m 2017-12-20T07:17:32.49
IV.VCEL.EHE. ML:2.4 0.00026700000000000004 1.7 AML other m 2017-12-20T07:17:34.12
IV.FAGN.HHN. ML:2.3 0.000253 0.46 AML other m 2017-12-20T07:17:35.69
IV.FAGN.HHE. ML:2.3 0.000268 1.58 AML other m 2017-12-20T07:17:35.79
IV.CAFI.HHE. ML:1.9 0.00009235 0.52 AML other m 2017-12-20T07:17:36.29
IV.T0110.HHN. ML:2.4 0.00022499999999999997 1.2 AML other m 2017-12-20T07:17:36.84
IV.CAFI.HHN. ML:2.0 0.00009470000000000001 0.62 AML other m 2017-12-20T07:17:37.44
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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