Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 04-07-2020 and time 21:50:10 (UTC) in region 4 km W Visso (MC)

A magnitude ML 1.0 earthquake occured in region: 4 km W Visso (MC), on

  • 04-07-2020 21:50:10 (UTC)
  • 04-07-2020 23:50:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9420, 13.0430 at 12 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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
Monte Cavallo MC 7 145 1252
Preci PG 7 724 1976
Ussita MC 8 444 2420
Castelsantangelo sul Nera MC 10 281 2701
Sellano PG 11 1079 3780
Fiordimonte MC 11 202 3982
Pieve Torina MC 12 1458 5440
Pievebovigliana MC 14 866 6306
Fiastra MC 14 559 6865
Acquacanina MC 15 121 6986
Muccia MC 16 915 7901
Bolognola MC 16 142 8043
Serravalle di Chienti MC 16 1070 9113
Cerreto di Spoleto PG 17 1075 10188
Norcia PG 17 4957 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)
56 Km E of Perugia (166134 inhabitants)
62 Km NW of Teramo (54892 inhabitants)
72 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
Reviewed
Rev100 		ML 1.0 2020-07-04
21:50:10		 42.9415 13.0432 12 2020-07-04
21:59:28		 Sala Sismica INGV-Roma 80782991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-04 21:50:10 ± 0.06
Latitude 42.9415 ± 0.0036
Longitude 13.0432 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 80782991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 409
Semi-minor axis of confidence ellipse (meter) 138
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 207
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) 136
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.02158
Epicentral distance of station farthest from the epicenter (degree) 0.29857
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 80782991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-04 21:59:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2020-07-04T21:50:22.04 0.3 undecidable manual S 290 33.1446 93 0.11 72
IV.GUMA.HHZ. 2020-07-04T21:50:20.86 0.3 undecidable manual S 60 27.2505 94 0.51 66
IV.MMO1.EHZ. 2020-07-04T21:50:19.16 0.3 undecidable manual S 101 23.5542 95 -0.21 70
IV.MML1.HNZ. 2020-07-04T21:50:18.25 0.3 undecidable manual S 343 19.9689 97 -0.16 72
IV.CSP1.EHZ. 2020-07-04T21:50:18.52 0.3 undecidable manual S 38 21.2676 96 -0.23 71
IV.ASSB.HHZ. 2020-07-04T21:50:17.12 0.3 undecidable manual P 290 33.1446 93 -0.03 72
IV.NRCA.HHZ. 2020-07-04T21:50:16.46 0.3 undecidable manual S 154 13.2756 113 -0.23 71
IV.CESI.HHZ. 2020-07-04T21:50:16.78 0.3 undecidable manual S 302 13.2756 113 0.1 74
IV.GUMA.HHZ. 2020-07-04T21:50:16.26 0.6 undecidable manual P 60 27.2505 94 0.02 49
IV.MC2.EHZ. 2020-07-04T21:50:16.52 0.3 undecidable manual S 106 12.2766 117 0.07 74
IV.FDMO.HHZ. 2020-07-04T21:50:15.94 0.3 undecidable manual S 19 11.0778 121 -0.24 73
IV.CSP1.EHZ. 2020-07-04T21:50:15.31 0.6 negative manual P 38 21.2676 96 0 49
IV.MMO1.EHZ. 2020-07-04T21:50:15.57 0.3 positive manual P 101 23.5542 95 -0.1 72
IV.MML1.HNZ. 2020-07-04T21:50:15.13 0.3 undecidable manual P 343 19.9689 97 0.01 74
IT.MTCL.HGZ. 2020-07-04T21:50:15.04 0.3 undecidable manual S 329 6.7932 141 -0.27 73
IV.CESI.HHZ. 2020-07-04T21:50:14.30 0.1 positive manual P 302 13.2756 113 0.18 97
IV.MC2.EHZ. 2020-07-04T21:50:14.19 0.3 undecidable manual P 106 12.2766 117 0.2 73
IV.FEMA.HNZ. 2020-07-04T21:50:14.86 0.3 undecidable manual S 13 2.3976 166 0.08 74
IV.NRCA.HHZ. 2020-07-04T21:50:14.11 0.1 positive manual P 154 13.2756 113 -0.02 99
IV.FEMA.HNZ. 2020-07-04T21:50:13.14 0.3 undecidable manual P 13 2.3976 166 0.12 74
IT.MTCL.HGZ. 2020-07-04T21:50:13.38 0.1 undecidable manual P 329 6.7932 141 0.05 100
IV.FDMO.HHZ. 2020-07-04T21:50:13.83 0.3 negative manual P 19 11.0778 121 0 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:0.8 0.000071552215 0.1408 AML other m 2020-07-04T21:50:16.45
IV.FDMO.HHN. ML:0.8 0.00006581039 0.128 AML other m 2020-07-04T21:50:16.47
IV.NRCA.HHE. ML:1.0 0.000094734645 0.0768 AML other m 2020-07-04T21:50:17.16
IV.NRCA.HHN. ML:1.2 0.000142890215 0.1152 AML other m 2020-07-04T21:50:16.56
IV.NRCA.HNE. ML:1.2 0.00015269895 2.304 AML other m 2020-07-04T21:50:17.48
IV.NRCA.HNN. ML:1.2 0.00014694242499999999 0.128 AML other m 2020-07-04T21:50:16.56
IV.CESI.HNE. ML:1.2 0.00014136875000000002 0.448 AML other m 2020-07-04T21:50:19.42
IV.CESI.HNN. ML:1.6 0.00043086025 0.4992 AML other m 2020-07-04T21:50:20.14
IV.CESI.HHE. ML:1.0 0.00009256724 0.1024 AML other m 2020-07-04T21:50:16.84
IV.CESI.HHN. ML:1.4 0.0002342395 0.1152 AML other m 2020-07-04T21:50:17.11
IV.CSP1.EHE. ML:0.8 0.000046837275 0.2048 AML other m 2020-07-04T21:50:19.22
IV.CSP1.EHN. ML:0.8 0.000040658695000000004 0.1408 AML other m 2020-07-04T21:50:19.40
IV.ASSB.HHE. ML:0.8 0.000022696519999999997 0.0768 AML other m 2020-07-04T21:50:22.81
IV.ASSB.HHN. ML:0.8 0.00002338498 0.1536 AML other m 2020-07-04T21:50:22.24
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