Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 31-05-2020 and time 20:08:17 (UTC) in region 4 km W Visso (MC)

A magnitude ML 1.2 earthquake occured in region: 4 km W Visso (MC), on

  • 31-05-2020 20:08:17 (UTC)
  • 31-05-2020 22:08:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9360, 13.0370 at 11 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 4 1107 1107
Preci PG 6 724 1831
Monte Cavallo MC 7 145 1976
Ussita MC 8 444 2420
Sellano PG 10 1079 3499
Castelsantangelo sul Nera MC 11 281 3780
Fiordimonte MC 12 202 3982
Pieve Torina MC 12 1458 5440
Pievebovigliana MC 15 866 6306
Fiastra MC 15 559 6865
Acquacanina MC 15 121 6986
Cerreto di Spoleto PG 16 1075 8061
Muccia MC 16 915 8976
Norcia PG 17 4957 13933
Serravalle di Chienti MC 17 1070 15003
Bolognola MC 17 142 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Foligno (57155 inhabitants)
52 Km NE of Terni (111501 inhabitants)
56 Km E of Perugia (166134 inhabitants)
63 Km W of Teramo (54892 inhabitants)
71 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 1.2 2020-05-31
20:08:17		 42.9355 13.0373 11 2020-05-31
20:14:56		 Sala Sismica INGV-Roma 79759801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-31 20:08:17 ± 0.05
Latitude 42.9355 ± 0.0036
Longitude 13.0373 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 79759801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 405
Semi-minor axis of confidence ellipse (meter) 249
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 220
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 140
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.39660
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 13
Type of magnitude ML
Reference to an origin 79759801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-31 20:14:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.APEC.HHZ. 2020-05-31T20:08:43.01 3.0 undecidable manual S 2.64 0
IV.EL6.EHZ. 2020-05-31T20:08:32.02 0.3 undecidable manual S 7 44.0226 50 0.48 64
IV.ATCC.EHZ. 2020-05-31T20:08:31.38 0.1 undecidable manual S 311 42.4242 50 0.25 90
IV.SNTG.HHZ. 2020-05-31T20:08:29.40 0.3 undecidable manual S 348 36.3414 50 -0.09 71
IV.ASSB.HHZ. 2020-05-31T20:08:28.39 0.1 undecidable manual S 291 32.9448 50 -0.19 93
IV.MTRA.EHZ. 2020-05-31T20:08:28.99 0.1 undecidable manual S 124 35.3424 50 -0.23 92
IV.GUMA.HHZ. 2020-05-31T20:08:27.71 0.1 undecidable manual S 60 27.9498 50 0.44 89
IV.PF6.EHZ. 2020-05-31T20:08:26.43 0.1 undecidable manual S 30 25.8519 50 -0.25 93
IV.MMO1.EHZ. 2020-05-31T20:08:25.86 0.1 undecidable manual S 100 23.8539 50 -0.31 92
IV.ATCC.EHZ. 2020-05-31T20:08:25.74 0.3 undecidable manual P 311 42.4242 50 0.49 64
IV.EL6.EHZ. 2020-05-31T20:08:25.52 0.6 undecidable manual P 7 44.0226 50 0.03 47
IV.CSP1.EHZ. 2020-05-31T20:08:25.55 0.1 undecidable manual S 38 22.0668 50 -0.13 96
IV.MTRA.EHZ. 2020-05-31T20:08:24.37 0.1 undecidable manual P 124 35.3424 50 0.22 92
IV.SNTG.HHZ. 2020-05-31T20:08:24.19 0.3 undecidable manual P 348 36.3414 50 -0.12 71
IV.MML1.HNZ. 2020-05-31T20:08:24.91 0.1 undecidable manual S 345 20.4684 117 -0.31 93
IV.MC2.EHZ. 2020-05-31T20:08:23.07 0.1 undecidable manual S 102 12.5763 130 0.13 98
IV.CESI.HHZ. 2020-05-31T20:08:23.09 0.1 undecidable manual S 306 13.2756 129 -0.01 100
IV.GUMA.HHZ. 2020-05-31T20:08:23.24 0.1 undecidable manual P 60 27.9498 50 0.22 93
IV.ASSB.HHZ. 2020-05-31T20:08:23.60 0.1 undecidable manual P 291 32.9448 50 -0.18 93
IV.NRCA.HHZ. 2020-05-31T20:08:22.82 0.1 undecidable manual S 151 12.876 129 -0.2 96
IV.CSP1.EHZ. 2020-05-31T20:08:22.02 0.1 undecidable manual P 38 22.0668 50 -0.08 97
IV.MMO1.EHZ. 2020-05-31T20:08:22.27 0.1 undecidable manual P 100 23.8539 50 -0.11 96
IV.FDMO.HHZ. 2020-05-31T20:08:22.63 0.1 undecidable manual S 20 11.877 132 -0.12 98
IV.PF6.EHZ. 2020-05-31T20:08:22.50 0.1 undecidable manual P 30 25.8519 50 -0.19 94
IV.FEMA.HNZ. 2020-05-31T20:08:21.16 0.1 undecidable manual S 19 3.0969 164 0.1 100
IV.MML1.HNZ. 2020-05-31T20:08:21.72 0.1 undecidable manual P 345 20.4684 117 -0.12 97
IT.MTCL.HGZ. 2020-05-31T20:08:21.44 0.1 undecidable manual S 335 7.1928 146 -0.22 97
IV.CESI.HHZ. 2020-05-31T20:08:20.76 0.1 undecidable manual P 306 13.2756 129 0.14 98
IV.FDMO.HHZ. 2020-05-31T20:08:20.51 0.1 undecidable manual P 20 11.877 132 0.09 99
IV.NRCA.HHZ. 2020-05-31T20:08:20.60 0.1 undecidable manual P 151 12.876 129 0.03 100
IV.MC2.EHZ. 2020-05-31T20:08:20.67 0.1 undecidable manual P 102 12.5763 130 0.15 97
IT.MTCL.HGZ. 2020-05-31T20:08:19.89 0.1 negative manual P 335 7.1928 146 0.1 99
IV.FEMA.HNZ. 2020-05-31T20:08:19.66 0.1 undecidable manual P 19 3.0969 164 0.22 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.7 0.0005625 0.14 AML other m 2020-05-31T20:08:23.40
IV.CESI.HHE. ML:1.5 0.000316 0.08 AML other m 2020-05-31T20:08:23.41
IV.CSP1.EHE. ML:1.2 0.00011095000000000001 1.46 AML other m 2020-05-31T20:08:25.85
IV.CSP1.EHN. ML:1.1 0.00009070000000000001 0.2 AML other m 2020-05-31T20:08:26.77
IV.ASSB.HHE. ML:1.1 0.00005645 0.26 AML other m 2020-05-31T20:08:28.70
IV.ASSB.HHN. ML:1.1 0.00004765 0.12 AML other m 2020-05-31T20:08:28.65
IV.MTRA.EHN. ML:1.0 0.0000443 1.38 AML other m 2020-05-31T20:08:30.01
IV.MTRA.EHE. ML:1.0 0.000042050000000000006 0.42 AML other m 2020-05-31T20:08:30.94
IV.CESI.HNE. ML:1.4 0.00025956410000000003 0.0896 AML other m 2020-05-31T20:08:23.24
IV.CESI.HNN. ML:1.7 0.0005631250500000001 0.1408 AML other m 2020-05-31T20:08:23.40
IV.SNTG.HHE. ML:0.4 0.000009404385 0.128 AML other m 2020-05-31T20:08:30.81
IV.SNTG.HHN. ML:0.4 0.000008939471999999998 0.1024 AML other m 2020-05-31T20:08:31.53
IV.EL6.EHE. ML:1.0 0.000028476665 0.384 AML other m 2020-05-31T20:08:32.34
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