Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 02-04-2020 and time 18:33:45 (UTC) in region 5 km W Visso (MC)

A magnitude ML 1.1 earthquake occured in region: 5 km W Visso (MC), on

  • 02-04-2020 18:33:45 (UTC)
  • 02-04-2020 20:33:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9410, 13.0310 at 10 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.

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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
Monte Cavallo MC 6 145 1252
Preci PG 7 724 1976
Ussita MC 9 444 2420
Sellano PG 10 1079 3499
Castelsantangelo sul Nera MC 11 281 3780
Pieve Torina MC 12 1458 5238
Fiordimonte MC 12 202 5440
Pievebovigliana MC 14 866 6306
Fiastra MC 15 559 6865
Acquacanina MC 15 121 6986
Muccia MC 16 915 7901
Serravalle di Chienti MC 16 1070 8971
Cerreto di Spoleto PG 16 1075 10046
Bolognola MC 17 142 10188
Norcia PG 17 4957 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Foligno (57155 inhabitants)
53 Km NE of Terni (111501 inhabitants)
55 Km E of Perugia (166134 inhabitants)
63 Km NW of Teramo (54892 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
95 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 1.1 2020-04-02
18:33:45		 42.9413 13.031 10 2020-04-02
18:39:48		 Sala Sismica INGV-Roma 77795771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-02 18:33:45 ± 0.06
Latitude 42.9413 ± 0.0027
Longitude 13.0310 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77795771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 378
Semi-minor axis of confidence ellipse (meter) 262
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 62
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 155
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.10342
Epicentral distance of station farthest from the epicenter (degree) 0.39120
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 77795771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-02 18:39:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2020-04-02T18:34:00.48 0.3 undecidable manual S 8 43.4232 50 0.21 69
IV.ATCC.EHZ. 2020-04-02T18:33:59.95 0.6 undecidable manual S 311 41.625 50 0.15 46
IV.SNTG.HHZ. 2020-04-02T18:33:57.97 0.6 undecidable manual S 348 35.5422 50 -0.2 47
IV.CSP1.EHZ. 2020-04-02T18:33:54.15 0.6 undecidable manual S 40 21.867 115 -0.19 48
IV.SMA1.EHZ. 2020-04-02T18:33:54.07 1.0 negative manual P 144 42.4242 50 -0.02 24
IV.EL6.EHZ. 2020-04-02T18:33:54.09 0.6 negative manual P 8 43.4232 50 -0.14 46
IV.ATCC.EHZ. 2020-04-02T18:33:53.82 1.0 negative manual P 311 41.625 50 -0.14 23
IV.SNTG.HHZ. 2020-04-02T18:33:52.75 1.0 negative manual P 348 35.5422 50 -0.27 23
IV.MC2.EHZ. 2020-04-02T18:33:52.08 0.6 undecidable manual S 104 13.2756 127 0.31 47
IV.CESI.HHZ. 2020-04-02T18:33:51.53 0.6 undecidable manual S 305 12.4764 129 -0.01 50
IV.FDMO.HHZ. 2020-04-02T18:33:51.20 0.6 undecidable manual S 23 11.4774 131 -0.09 50
IV.NRCA.HHZ. 2020-04-02T18:33:51.67 0.6 undecidable manual S 150 13.7751 126 -0.23 48
IV.CSP1.EHZ. 2020-04-02T18:33:50.74 0.6 negative manual P 40 21.867 115 -0.07 49
IV.NRCA.HHZ. 2020-04-02T18:33:49.37 0.1 positive manual P 150 13.7751 126 -0.04 100
IV.MC2.EHZ. 2020-04-02T18:33:49.61 1.0 undecidable manual P 104 13.2756 127 0.29 24
IV.CESI.HHZ. 2020-04-02T18:33:49.28 0.1 undecidable manual P 305 12.4764 129 0.09 99
IV.FDMO.HHZ. 2020-04-02T18:33:49.14 0.3 negative manual P 23 11.4774 131 0.09 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.1 0.0001395 0.2 AML other m 2020-04-02T18:33:51.44
IV.FDMO.HHE. ML:1.0 0.0001225 0.22 AML other m 2020-04-02T18:33:51.73
IV.CESI.HHE. ML:1.2 0.000155 0.6 AML other m 2020-04-02T18:33:51.98
IV.NRCA.HHN. ML:1.7 0.0004905 0.1 AML other m 2020-04-02T18:33:51.82
IV.CESI.HHN. ML:1.4 0.000258 0.16 AML other m 2020-04-02T18:33:51.97
IV.NRCA.HHE. ML:1.5 0.0003125 1.72 AML other m 2020-04-02T18:33:52.89
IV.SNTG.HHE. ML:1.0 0.0000386 1.16 AML other m 2020-04-02T18:33:58.34
IV.SNTG.HHN. ML:0.9 0.000030449999999999998 0.42 AML other m 2020-04-02T18:33:59.15
IV.ATCC.EHE. ML:1.0 0.000029999999999999997 0.98 AML other m 2020-04-02T18:34:00.92
IV.ATCC.EHN. ML:1.0 0.00003515 1.58 AML other m 2020-04-02T18:34:03.07
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