Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 18-10-2021 and time 22:15:10 (Italy) in region 2 km E Visso (MC)

A magnitude ML 1.6 earthquake occured in region: 2 km E Visso (MC), on

  • 18-10-2021 20:15:10 (UTC)
  • 18-10-2021 22:15:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9220, 13.1160 at 9 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 2 1107 1107
Ussita MC 3 444 1551
Castelsantangelo sul Nera MC 4 281 1832
Preci PG 8 724 2556
Monte Cavallo MC 12 145 2701
Bolognola MC 12 142 2843
Fiordimonte MC 13 202 3045
Acquacanina MC 13 121 3166
Fiastra MC 13 559 3725
Norcia PG 15 4957 8682
Pieve Torina MC 15 1458 10140
Sellano PG 16 1079 11219
Pievebovigliana MC 16 866 12085
Montemonaco AP 17 604 12689
Montefortino FM 19 1178 13867
Muccia MC 19 915 14782
Cerreto di Spoleto PG 20 1075 15857
Sarnano MC 20 3264 19121
Montegallo AP 20 523 19644

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
55 Km NE of Terni (111501 inhabitants)
56 Km NW of Teramo (54892 inhabitants)
63 Km E of Perugia (166134 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
96 Km W of Montesilvano (53738 inhabitants)
100 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 1.6 2021-10-18
20:15:10		 42.9223 13.1157 9 2022-03-30
13:04:13		 Bollettino Sismico Italiano INGV 97055581
Reviewed
Rev100 		ML 1.6 2021-10-18
20:15:10		 42.9248 13.1117 9 2021-10-18
20:22:11		 Sala Sismica INGV-Roma 96735911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-18 20:15:10 ± 0.04
Latitude 42.9223 ± 0.0018
Longitude 13.1157 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97055581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 216
Semi-minor axis of confidence ellipse (meter) 198
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 290
Circular confidence region, given by single value of horizontal uncertainty (meter) 220.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 36
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) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.05486
Epicentral distance of station farthest from the epicenter (degree) 0.75003
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 35
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 51
Type of magnitude ML
Reference to an origin 97055581
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-16 15:17:09

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 41
Type of magnitude ML
Reference to an origin 96735911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-18 20:22:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2021-10-18T20:15:31.73 0.6 undecidable manual S 348 65.3901 50 0.65 39
IV.CESX.HHE. 2021-10-18T20:15:28.67 0.6 undecidable manual S 231 55.4001 50 0.27 44
IV.CING.HNZ. 2021-10-18T20:15:27.25 0.6 undecidable manual S 7 50.7159 50 0.1 46
IV.TERO.HHZ. 2021-10-18T20:15:27.25 0.6 undecidable manual S 130 51.8037 50 -0.2 45
IV.RM33.EHZ. 2021-10-18T20:15:26.20 0.6 undecidable manual S 170 46.5201 50 0.16 46
IV.ATCC.EHZ. 2021-10-18T20:15:26.96 0.6 undecidable manual S 307 48.3183 50 0.44 43
IV.MOMA.HHZ. 2021-10-18T20:15:26.66 0.6 undecidable manual S 254 46.2204 50 0.69 39
IV.ARRO.EHZ. 2021-10-18T20:15:26.48 0.3 undecidable manual S 217 47.5191 50 0.16 68
IV.EL6.EHZ. 2021-10-18T20:15:25.51 0.6 undecidable manual S 359 45.1215 50 -0.17 46
IV.VCEL.EHZ. 2021-10-18T20:15:25.26 0.3 undecidable manual P 134 83.25 50 0.08 65
IV.MNTP.HNZ. 2021-10-18T20:15:24.30 0.3 undecidable manual S 50 37.3293 50 0.72 59
IV.ASSB.HHZ. 2021-10-18T20:15:24.00 0.6 undecidable manual S 290 39.4272 50 -0.14 47
IV.T1299.HNN. 2021-10-18T20:15:23.09 0.6 undecidable manual S 157 34.743 50 0.21 46
IV.SNTG.HHZ. 2021-10-18T20:15:23.89 0.3 undecidable manual S 339 39.5271 50 -0.28 68
IV.SMA1.EHZ. 2021-10-18T20:15:23.05 0.6 undecidable manual S 151 37.0296 50 -0.44 44
IV.LNSS.HHZ. 2021-10-18T20:15:22.94 0.6 undecidable manual S 190 35.9418 50 -0.28 45
IV.ARVD.HHZ. 2021-10-18T20:15:22.91 0.3 undecidable manual P 348 65.3901 50 0.47 62
IV.SAP2.EHZ. 2021-10-18T20:15:21.97 0.6 undecidable manual S 50 30.0477 106 0.49 44
IV.MF5.EHZ. 2021-10-18T20:15:21.51 0.6 undecidable manual S 75 28.8489 107 0.43 45
IV.MURB.HHZ. 2021-10-18T20:15:21.79 0.3 undecidable manual P 308 60.9945 50 0.04 68
IV.GAVE.EHZ. 2021-10-18T20:15:21.92 0.6 undecidable manual S 215 31.2465 105 0.05 48
IV.TERO.HHZ. 2021-10-18T20:15:20.01 0.1 undecidable manual P 130 51.8037 50 -0.33 87
IV.MTRA.HNZ. 2021-10-18T20:15:20.82 0.6 undecidable manual S 129 29.3484 106 -0.41 45
IV.OFFI.HHZ. 2021-10-18T20:15:20.04 0.1 undecidable manual P 88 46.3203 50 0.55 84
IV.CESX.HHE. 2021-10-18T20:15:20.73 0.3 undecidable manual P 231 55.4001 50 -0.16 67
IV.MDAR.HNZ. 2021-10-18T20:15:20.86 0.3 undecidable manual S 4 30.0477 106 -0.62 63
IV.MNTT.EHZ. 2021-10-18T20:15:19.23 0.1 negative manual P 68 41.9247 50 0.41 87
IV.GUMA.HHZ. 2021-10-18T20:15:19.62 0.6 undecidable manual S 49 23.6541 110 0.25 47
IV.ARRO.EHZ. 2021-10-18T20:15:19.59 0.1 undecidable manual P 217 47.5191 50 -0.09 93
IV.MML1.EHZ. 2021-10-18T20:15:19.27 0.6 undecidable manual S 331 24.1536 110 -0.27 46
IV.ATCC.EHZ. 2021-10-18T20:15:19.76 0.1 undecidable manual P 307 48.3183 50 -0.05 93
IV.MOMA.HHZ. 2021-10-18T20:15:19.40 0.1 undecidable manual P 254 46.2204 50 -0.09 93
IV.RM33.EHZ. 2021-10-18T20:15:19.30 0.1 undecidable manual P 170 46.5201 50 -0.23 90
IV.PF6.EHZ. 2021-10-18T20:15:19.15 0.6 undecidable manual S 15 24.753 109 -0.57 43
IV.CING.HNZ. 2021-10-18T20:15:19.90 0.3 undecidable manual P 7 50.7159 50 -0.27 67
IV.SNTG.HHZ. 2021-10-18T20:15:18.15 0.3 undecidable manual P 339 39.5271 50 -0.3 67
IV.CSP1.EHZ. 2021-10-18T20:15:18.03 0.6 undecidable manual S 21 20.1687 113 -0.2 47
IV.ASSB.HHZ. 2021-10-18T20:15:18.18 0.1 positive manual P 290 39.4272 50 -0.25 91
IV.CESI.HHZ. 2021-10-18T20:15:18.29 0.1 undecidable manual S 298 19.4694 114 0.28 93
IV.EL6.EHZ. 2021-10-18T20:15:18.98 0.1 negative manual P 359 45.1215 50 -0.34 88
IV.MNTP.HNZ. 2021-10-18T20:15:18.25 0.3 undecidable manual P 50 37.3293 50 0.15 70
IV.T1299.HNN. 2021-10-18T20:15:17.62 0.1 undecidable manual P 157 34.743 50 -0.09 95
IV.GAVE.EHZ. 2021-10-18T20:15:17.08 0.1 undecidable manual P 215 31.2465 105 -0.04 96
IV.SMA1.EHZ. 2021-10-18T20:15:17.71 0.1 undecidable manual P 151 37.0296 50 -0.34 89
IV.MMO1.EHZ. 2021-10-18T20:15:17.19 0.6 undecidable manual S 98 17.3715 117 -0.17 48
IV.LNSS.HHZ. 2021-10-18T20:15:17.70 0.1 undecidable manual P 190 35.9418 50 -0.19 93
IV.MDAR.HNZ. 2021-10-18T20:15:16.68 0.3 undecidable manual P 4 30.0477 106 -0.22 70
IV.SAP2.EHZ. 2021-10-18T20:15:16.95 0.1 positive manual P 50 30.0477 106 0.06 96
IV.MTRA.HNZ. 2021-10-18T20:15:16.55 0.1 undecidable manual P 129 29.3484 106 -0.2 93
IV.MF5.EHZ. 2021-10-18T20:15:16.76 0.1 positive manual P 75 28.8489 107 0.09 96
IV.NRCA.HNZ. 2021-10-18T20:15:15.30 0.6 undecidable manual S 181 9.879 131 0.12 49
IV.MML1.EHZ. 2021-10-18T20:15:15.65 0.1 undecidable manual P 331 24.1536 110 -0.13 96
IV.FDMO.HHZ. 2021-10-18T20:15:15.73 0.6 undecidable manual S 350 12.876 124 -0.28 47
IT.MTCL.HGZ. 2021-10-18T20:15:15.82 0.6 undecidable manual S 310 12.3765 125 -0.03 50
IV.GUMA.HHZ. 2021-10-18T20:15:15.77 0.1 positive manual P 49 23.6541 110 0.1 96
IV.PF6.EHZ. 2021-10-18T20:15:15.56 0.1 undecidable manual P 15 24.753 109 -0.32 92
IV.CESI.HHZ. 2021-10-18T20:15:15.05 0.1 positive manual P 298 19.4694 114 0.16 96
IV.CSP1.EHZ. 2021-10-18T20:15:14.90 0.1 positive manual P 21 20.1687 113 -0.12 97
IV.MC2.EHZ. 2021-10-18T20:15:14.31 0.6 undecidable manual S 101 6.0939 145 0.01 51
IV.MMO1.EHZ. 2021-10-18T20:15:14.49 0.1 positive manual P 98 17.3715 117 -0.02 99
IV.FEMA.HNZ. 2021-10-18T20:15:14.55 0.6 undecidable manual S 310 6.8931 141 0.07 50
IV.FEMA.HNZ. 2021-10-18T20:15:13.13 0.1 undecidable manual P 310 6.8931 141 0.29 95
IT.MTCL.HGZ. 2021-10-18T20:15:13.82 0.1 undecidable manual P 310 12.3765 125 0.18 97
IV.NRCA.HNZ. 2021-10-18T20:15:13.54 0.1 positive manual P 181 9.879 131 0.29 95
IV.FDMO.HHZ. 2021-10-18T20:15:13.74 0.1 negative manual P 350 12.876 124 0.01 100
IV.MC2.EHZ. 2021-10-18T20:15:12.94 0.1 positive manual P 101 6.0939 145 0.19 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.3 0.0025 0.14 AML other m 2021-10-18T20:15:15.41
IV.NRCA.HHE. ML:2.3 0.0027778225000000003 0.0768 AML other m 2021-10-18T20:15:15.51
IV.NRCA.HHN. ML:1.9 0.0010078215999999999 0.064 AML other m 2021-10-18T20:15:15.55
IV.NRCA.HNN. ML:1.8 0.00094146675 0.1792 AML other m 2021-10-18T20:15:15.47
IV.FDMO.HHN. ML:1.5 0.0003765 1.66 AML other m 2021-10-18T20:15:15.03
IV.FDMO.HHE. ML:1.5 0.00034516049999999996 0.1792 AML other m 2021-10-18T20:15:15.99
IV.CSP1.EHN. ML:2.0 0.000885549 0.1408 AML other m 2021-10-18T20:15:18.18
IV.CSP1.EHE. ML:1.8 0.0004990066000000001 0.1152 AML other m 2021-10-18T20:15:18.24
IV.CESI.HHE. ML:1.8 0.00049124835 0.2688 AML other m 2021-10-18T20:15:18.68
IV.CESI.HNE. ML:1.7 0.00038448320000000004 0.2688 AML other m 2021-10-18T20:15:18.68
IV.CESI.HHN. ML:2.1 0.0009279999999999999 0.22 AML other m 2021-10-18T20:15:18.56
IV.CESI.HNN. ML:2.1 0.0009355484 0.2048 AML other m 2021-10-18T20:15:18.56
IV.MML1.HNE. ML:1.3 0.0001194335 0.1408 AML other m 2021-10-18T20:15:19.64
IV.MML1.EHE. ML:1.2 0.00009960356000000001 0.1536 AML other m 2021-10-18T20:15:19.64
IV.MML1.HNN. ML:1.2 0.00010763740999999999 0.2432 AML other m 2021-10-18T20:15:19.62
IV.MML1.EHN. ML:1.2 0.00011054411499999999 0.384 AML other m 2021-10-18T20:15:19.62
IV.GUMA.HNN. ML:2.0 0.0006068607 0.1792 AML other m 2021-10-18T20:15:19.81
IV.GUMA.HNE. ML:1.8 0.0004071831 0.1664 AML other m 2021-10-18T20:15:19.72
IV.GUMA.HHE. ML:2.1 0.000811 0.18 AML other m 2021-10-18T20:15:19.82
IV.GUMA.HHN. ML:1.9 0.0005637065 0.5632 AML other m 2021-10-18T20:15:20.08
IV.MF5.EHE. ML:1.3 0.00010555019999999999 0.3456 AML other m 2021-10-18T20:15:22.05
IV.GAVE.EHN. ML:2.0 0.00044711905 0.1664 AML other m 2021-10-18T20:15:22.12
IV.GAVE.HNN. ML:1.6 0.00018299005000000003 0.6016 AML other m 2021-10-18T20:15:22.43
IV.GAVE.HNE. ML:2.0 0.0005444269 0.4096 AML other m 2021-10-18T20:15:22.39
IV.SAP2.EHN. ML:2.0 0.00049220785 0.1792 AML other m 2021-10-18T20:15:22.18
IV.GAVE.EHE. ML:2.1 0.0005646047 0.384 AML other m 2021-10-18T20:15:22.38
IV.SAP2.EHE. ML:1.2 0.00008581649000000001 0.1408 AML other m 2021-10-18T20:15:22.30
IV.LNSS.HHE. ML:1.6 0.00014324547 0.7168 AML other m 2021-10-18T20:15:23.55
IV.SMA1.EHE. ML:1.2 0.000061482275 0.7424 AML other m 2021-10-18T20:15:23.76
IV.LNSS.HHN. ML:1.9 0.00028466475 0.2432 AML other m 2021-10-18T20:15:23.39
IV.SMA1.EHN. ML:1.4 0.00009346947500000001 0.7424 AML other m 2021-10-18T20:15:23.61
IV.LNSS.HNN. ML:1.9 0.0003360444 0.2304 AML other m 2021-10-18T20:15:23.64
IV.SNTG.HHE. ML:0.8 0.0000201506485 0.1408 AML other m 2021-10-18T20:15:23.92
IV.ASSB.HHN. ML:1.4 0.00008138369000000001 0.384 AML other m 2021-10-18T20:15:24.34
IV.SNTG.HHN. ML:0.8 0.000026679325 0.1792 AML other m 2021-10-18T20:15:24.32
IV.ASSB.HHE. ML:1.3 0.00007379127 0.0896 AML other m 2021-10-18T20:15:24.47
IV.EL6.EHE. ML:1.5 0.00009170582 0.256 AML other m 2021-10-18T20:15:25.77
IV.EL6.EHN. ML:1.8 0.00019447020000000001 0.1664 AML other m 2021-10-18T20:15:26.35
IV.RM33.EHN. ML:1.2 0.000048957355000000004 0.3584 AML other m 2021-10-18T20:15:26.48
IV.RM33.EHE. ML:1.3 0.00005649296 0.1536 AML other m 2021-10-18T20:15:26.68
IV.ARRO.EHN. ML:1.3 0.00005604323 0.1536 AML other m 2021-10-18T20:15:26.69
IV.ARRO.EHE. ML:1.0 0.00002623255 0.1536 AML other m 2021-10-18T20:15:26.85
IV.ATCC.EHN. ML:1.1 0.000032879610499999995 0.384 AML other m 2021-10-18T20:15:27.26
IV.MOMA.HNE. ML:1.6 0.00010559200500000001 0.6528 AML other m 2021-10-18T20:15:27.46
IV.ATCC.EHE. ML:1.3 0.00006219402000000001 0.1792 AML other m 2021-10-18T20:15:27.16
IV.MOMA.HHE. ML:1.4 0.000069027035 0.192 AML other m 2021-10-18T20:15:27.35
IV.TERO.HHN. ML:1.6 0.00011231615 0.1024 AML other m 2021-10-18T20:15:27.56
IV.TERO.HHE. ML:1.5 0.000081505515 0.4096 AML other m 2021-10-18T20:15:27.49
IV.MURB.HHE. ML:1.6 0.000074751555 0.2688 AML other m 2021-10-18T20:15:31.51
IV.ARVD.HHN. ML:0.7 0.0000124069415 0.1408 AML other m 2021-10-18T20:15:32.06
IV.ARVD.HHE. ML:1.0 0.000021571405999999998 0.1664 AML other m 2021-10-18T20:15:32.49
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