Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 08-07-2021 and time 21:47:51 (UTC) in region 5 km S Visso (MC)

A magnitude ML 1.8 earthquake occured in region: 5 km S Visso (MC), on

  • 08-07-2021 21:47:51 (UTC)
  • 08-07-2021 23:47:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8900, 13.0960 at 10 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 5 1107 1107
Castelsantangelo sul Nera MC 5 281 1388
Preci PG 5 724 2112
Ussita MC 7 444 2556
Norcia PG 11 4957 7513
Sellano PG 14 1079 8592
Monte Cavallo MC 14 145 8737
Bolognola MC 16 142 8879
Cerreto di Spoleto PG 17 1075 9954
Fiordimonte MC 17 202 10156
Acquacanina MC 17 121 10277
Fiastra MC 17 559 10836
Pieve Torina MC 18 1458 12294
Montemonaco AP 19 604 12898
Pievebovigliana MC 19 866 13764

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Foligno (57155 inhabitants)
52 Km NE of Terni (111501 inhabitants)
56 Km W of Teramo (54892 inhabitants)
62 Km E of Perugia (166134 inhabitants)
65 Km NW of L'Aquila (69753 inhabitants)
88 Km SW of Ancona (100861 inhabitants)
96 Km W of Montesilvano (53738 inhabitants)
97 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 1.8 2021-07-08
21:47:51		 42.8897 13.0963 10 2021-12-29
11:12:13		 Bollettino Sismico Italiano INGV 93008041
Reviewed
Rev100 		ML 1.8 2021-07-08
21:47:51		 42.8892 13.0888 11 2021-07-08
21:57:20		 Sala Sismica INGV-Roma 92449881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-08 21:47:51 ± 0.03
Latitude 42.8897 ± 0.0018
Longitude 13.0963 ± 0.0025
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 93008041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 255
Semi-minor axis of confidence ellipse (meter) 139
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 53
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 40
Number of associated phases, regardless of their use for origin computation 60
Number of defining phases 60
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.05756
Epicentral distance of station farthest from the epicenter (degree) 0.61873
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 33
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 93008041
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-21 08:26:16

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 92449881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-08 21:57:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FOSV.HNE. 2021-07-08T21:48:08.66 0.6 undecidable manual S 329 52.503 50 0.2 45
IV.EL6.EHZ. 2021-07-08T21:48:07.73 0.6 undecidable manual S 0 48.8178 50 0.26 45
IV.TERO.HHN. 2021-07-08T21:48:07.94 0.6 undecidable manual S 125 50.8158 50 -0.07 46
IV.ATCC.EHZ. 2021-07-08T21:48:07.98 0.6 undecidable manual S 312 49.4172 50 0.34 44
IV.CAMP.HHE. 2021-07-08T21:48:06.95 0.6 undecidable manual S 147 46.8198 50 0.02 47
IV.MOMA.HHZ. 2021-07-08T21:48:06.89 0.6 undecidable manual S 258 43.8228 50 0.75 39
IV.RM33.EHZ. 2021-07-08T21:48:06.31 0.3 undecidable manual S 167 43.3233 50 0.31 67
IV.ASSB.HHZ. 2021-07-08T21:48:04.81 0.3 undecidable manual S 296 39.3273 50 -0.14 70
IV.ARVD.HHZ. 2021-07-08T21:48:03.87 1.0 undecidable manual P 350 68.6757 50 -0.05 23
IV.MF5.EHZ. 2021-07-08T21:48:03.23 0.6 undecidable manual S 70 31.4463 50 0.39 45
IV.ATFO.HHZ. 2021-07-08T21:48:03.64 0.1 undecidable manual P 321 67.8765 50 -0.16 88
IV.SMA1.EHN. 2021-07-08T21:48:03.59 0.6 undecidable manual S 146 34.743 50 -0.11 47
IT.FOPC.HGN. 2021-07-08T21:48:03.62 0.6 undecidable manual S 286 33.1446 50 0.33 45
IV.SSFR.HHZ. 2021-07-08T21:48:03.53 0.1 undecidable manual P 337 65.7897 50 0.06 90
IV.T1299.HNN. 2021-07-08T21:48:03.25 0.3 undecidable manual S 152 32.1456 50 0.24 70
IV.SAP2.EHE. 2021-07-08T21:48:03.72 0.6 undecidable manual S 47 33.6441 50 0.3 46
IV.GUMA.HHZ. 2021-07-08T21:48:02.22 0.6 undecidable manual S 45 27.2505 50 0.5 44
IV.LNSS.HNZ. 2021-07-08T21:48:02.74 0.6 undecidable manual S 188 32.1456 50 -0.28 46
IV.PF6.EHN. 2021-07-08T21:48:01.67 0.6 undecidable manual S 16 28.6491 50 -0.42 45
IV.CING.HHZ. 2021-07-08T21:48:01.79 0.6 negative manual P 8 54.501 50 0.05 46
IV.TERO.HHN. 2021-07-08T21:48:01.06 0.3 undecidable manual P 125 50.8158 50 -0.11 69
IV.GAVE.EHN. 2021-07-08T21:48:01.61 0.6 undecidable manual S 217 27.3504 50 -0.14 48
IV.MML1.EHZ. 2021-07-08T21:48:01.31 0.3 undecidable manual S 338 26.8509 50 -0.29 69
IV.FOSV.HNE. 2021-07-08T21:48:01.54 0.6 undecidable manual P 329 52.503 50 0.11 46
IV.MTRA.EHZ. 2021-07-08T21:48:01.82 0.3 undecidable manual S 121 28.5492 50 -0.23 70
IV.CAMP.HHE. 2021-07-08T21:48:00.24 0.3 undecidable manual P 147 46.8198 50 -0.31 67
IV.MOMA.HHZ. 2021-07-08T21:48:00.56 0.6 undecidable manual P 258 43.8228 50 0.47 43
IV.RM33.EHZ. 2021-07-08T21:48:00.03 0.1 undecidable manual P 167 43.3233 50 0.02 95
IV.EL6.EHZ. 2021-07-08T21:48:00.69 0.1 undecidable manual P 0 48.8178 50 -0.17 91
IV.CSP1.EHZ. 2021-07-08T21:48:00.58 0.6 undecidable manual S 21 24.0537 50 -0.29 46
IV.ARRO.EHZ. 2021-07-08T21:48:00.16 1.0 negative manual P 218 43.7229 50 0.08 23
IV.ATCC.EHZ. 2021-07-08T21:48:00.89 0.3 undecidable manual P 312 49.4172 50 -0.07 70
IV.MNTT.EHZ. 2021-07-08T21:48:00.16 1.0 undecidable manual P 65 44.8218 50 -0.09 23
IV.ASSB.HHZ. 2021-07-08T21:47:59.21 0.1 undecidable manual P 296 39.3273 50 -0.2 92
IV.CESI.HHZ. 2021-07-08T21:47:59.59 0.3 undecidable manual S 309 20.1687 117 -0.11 73
IV.SAP2.EHE. 2021-07-08T21:47:59.03 0.6 undecidable manual P 47 33.6441 50 0.51 44
IV.MMO1.EHZ. 2021-07-08T21:47:59.08 0.3 undecidable manual S 87 18.7701 119 -0.2 72
IT.FOPC.HGN. 2021-07-08T21:47:58.55 0.6 undecidable manual P 286 33.1446 50 0.1 48
IV.LNSS.HNZ. 2021-07-08T21:47:58.11 0.1 positive manual P 188 32.1456 50 -0.18 94
IV.T1299.HNN. 2021-07-08T21:47:58.29 0.1 positive manual P 152 32.1456 50 0 97
IV.FDMO.HHZ. 2021-07-08T21:47:58.32 0.6 undecidable manual S 357 16.2726 123 -0.23 48
IV.SMA1.EHN. 2021-07-08T21:47:58.41 0.3 undecidable manual P 146 34.743 50 -0.28 69
IV.MF5.EHZ. 2021-07-08T21:47:58.47 0.1 undecidable manual P 70 31.4463 50 0.28 92
IV.GAVE.EHN. 2021-07-08T21:47:57.60 0.6 undecidable manual P 217 27.3504 50 0.04 49
IV.MML1.EHZ. 2021-07-08T21:47:57.32 0.1 undecidable manual P 338 26.8509 50 -0.15 95
IV.MTRA.EHZ. 2021-07-08T21:47:57.53 0.1 undecidable manual P 121 28.5492 50 -0.2 94
IT.MTCL.HGZ. 2021-07-08T21:47:57.65 0.3 undecidable manual S 326 13.9749 127 -0.24 72
IV.PF6.EHN. 2021-07-08T21:47:57.59 0.1 undecidable manual P 16 28.6491 50 -0.16 95
IV.GUMA.HHZ. 2021-07-08T21:47:57.69 0.1 undecidable manual P 45 27.2505 50 0.14 95
IV.FEMA.HNZ. 2021-07-08T21:47:56.66 0.3 undecidable manual S 335 8.88 140 0.07 75
IV.MMO1.EHZ. 2021-07-08T21:47:56.10 0.1 positive manual P 87 18.7701 119 -0.03 99
IV.CESI.HHZ. 2021-07-08T21:47:56.40 0.1 negative manual P 309 20.1687 117 0.02 99
IV.CSP1.EHZ. 2021-07-08T21:47:56.88 0.1 undecidable manual P 21 24.0537 50 -0.17 95
IV.MC2.EHZ. 2021-07-08T21:47:56.55 0.3 undecidable manual S 72 7.881 143 0.17 73
IV.FDMO.HHZ. 2021-07-08T21:47:55.71 0.1 negative manual P 357 16.2726 123 0 100
IV.NRCA.HNZ. 2021-07-08T21:47:55.96 0.3 undecidable manual S 167 6.3936 148 -0.12 75
IT.MTCL.HGZ. 2021-07-08T21:47:55.35 0.1 negative manual P 326 13.9749 127 0.02 100
IV.NRCA.HNZ. 2021-07-08T21:47:54.45 0.1 positive manual P 167 6.3936 148 0.17 98
IV.MC2.EHZ. 2021-07-08T21:47:54.71 0.1 undecidable manual P 72 7.881 143 0.26 96
IV.FEMA.HNZ. 2021-07-08T21:47:54.82 0.1 negative manual P 335 8.88 140 0.24 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:2.6 0.005974999999999999 0.14 AML other m 2021-07-08T21:47:56.14
IV.NRCA.HNE. ML:2.5 0.00549 0.14 AML other m 2021-07-08T21:47:56.14
IV.NRCA.HNN. ML:2.2 0.0025700000000000002 0.14 AML other m 2021-07-08T21:47:56.10
IV.NRCA.HHN. ML:2.2 0.002715 0.14 AML other m 2021-07-08T21:47:56.10
IV.FEMA.HNN. ML:1.9 0.0011149999999999999 0.38 AML other m 2021-07-08T21:47:56.71
IV.FEMA.HNE. ML:2.0 0.0012250000000000002 1.4 AML other m 2021-07-08T21:47:57.80
IV.FDMO.HHE. ML:1.8 0.000519 0.2 AML other m 2021-07-08T21:47:58.50
IV.FDMO.HHN. ML:1.7 0.0004835 1.9 AML other m 2021-07-08T21:47:59.01
IV.CESI.HHE. ML:2.2 0.0011025 0.2 AML other m 2021-07-08T21:47:59.66
IV.CESI.HHN. ML:2.3 0.00149 0.26 AML other m 2021-07-08T21:47:59.80
IV.CSP1.EHE. ML:1.9 0.0005420000000000001 0.26 AML other m 2021-07-08T21:48:01.23
IV.CSP1.EHN. ML:2.0 0.0005729999999999999 0.36 AML other m 2021-07-08T21:48:01.70
IV.MML1.HNN. ML:2.0 0.000588 1.06 AML other m 2021-07-08T21:48:01.63
IV.MML1.EHN. ML:2.0 0.000592 1.06 AML other m 2021-07-08T21:48:01.64
IV.MML1.HNE. ML:1.9 0.00039 1.02 AML other m 2021-07-08T21:48:01.72
IV.MML1.EHE. ML:1.8 0.00038700000000000003 0.16 AML other m 2021-07-08T21:48:01.72
IV.MTRA.EHN. ML:1.7 0.00026649999999999997 1 AML other m 2021-07-08T21:48:03.02
IV.MTRA.EHE. ML:1.8 0.0003085 0.42 AML other m 2021-07-08T21:48:03.09
IV.GUMA.HHN. ML:1.6 0.00021349999999999999 0.24 AML other m 2021-07-08T21:48:03.58
IV.MF5.EHE. ML:1.7 0.00022300000000000003 0.18 AML other m 2021-07-08T21:48:04.08
IV.MF5.EHN. ML:1.5 0.000129 0.2 AML other m 2021-07-08T21:48:04.09
IV.GUMA.HHE. ML:1.6 0.0001975 1.44 AML other m 2021-07-08T21:48:04.75
IV.ASSB.HHN. ML:1.7 0.0001815 0.22 AML other m 2021-07-08T21:48:05.11
IV.ASSB.HHE. ML:1.7 0.0001605 0.7 AML other m 2021-07-08T21:48:05.05
IV.RM33.EHN. ML:1.3 0.0000616 0.64 AML other m 2021-07-08T21:48:06.96
IV.MOMA.HHE. ML:1.4 0.00008444999999999999 0.84 AML other m 2021-07-08T21:48:07.53
IV.MOMA.HHN. ML:1.5 0.00009515 0.42 AML other m 2021-07-08T21:48:08.67
IV.RM33.EHE. ML:1.2 0.00005505 0.18 AML other m 2021-07-08T21:48:08.76
IV.EL6.EHE. ML:1.8 0.0001842 0.42 AML other m 2021-07-08T21:48:09.95
IV.EL6.EHN. ML:1.8 0.000158 0.42 AML other m 2021-07-08T21:48:10.35
IV.MNTT.EHE. ML:2.2 0.0005235 0.18 AML other m 2021-07-08T21:48:10.60
IV.MNTT.EHN. ML:2.1 0.00035950000000000006 0.22 AML other m 2021-07-08T21:48:10.86
IV.SSFR.HHN. ML:1.7 0.0000829 0.66 AML other m 2021-07-08T21:48:13.61
IV.SSFR.HHE. ML:1.8 0.0001125 0.26 AML other m 2021-07-08T21:48:14.85
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