Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 29-09-2020 and time 20:03:38 (UTC) in region 4 km S Visso (MC)

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

  • 29-09-2020 20:03:38 (UTC)
  • 29-09-2020 22:03:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8920, 13.0940 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.

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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
Preci PG 5 724 1831
Castelsantangelo sul Nera MC 5 281 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
Fiordimonte MC 16 202 9081
Cerreto di Spoleto PG 17 1075 10156
Acquacanina MC 17 121 10277
Fiastra MC 17 559 10836
Pieve Torina MC 17 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
Reviewed
Rev100 		ML 1.0 2020-09-29
20:03:38		 42.8918 13.0942 12 2020-09-29
20:07:20		 Sala Sismica INGV-Roma 83372881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-29 20:03:38 ± 0.05
Latitude 42.8918 ± 0.0027
Longitude 13.0942 ± 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 83372881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 290
Semi-minor axis of confidence ellipse (meter) 176
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 342
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
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) 0.06025
Epicentral distance of station farthest from the epicenter (degree) 0.44247
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 83372881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-29 20:07:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GAVE.EHZ. 2020-09-29T20:03:48.56 0.3 undecidable manual S 216 27.4503 92 0.02 73
IV.ATCC.EHZ. 2020-09-29T20:03:47.84 0.1 undecidable manual P 312 49.1175 91 0.1 93
IV.CSP1.EHZ. 2020-09-29T20:03:47.59 0.3 undecidable manual S 22 23.9538 92 0 73
IV.CESI.HHZ. 2020-09-29T20:03:46.48 0.3 undecidable manual S 309 19.869 94 -0.04 72
IV.MMO1.EHZ. 2020-09-29T20:03:46.08 0.6 undecidable manual S 87 18.9699 94 -0.18 48
IV.FDMO.HHZ. 2020-09-29T20:03:45.34 0.3 undecidable manual S 358 16.0728 98 -0.16 71
IV.GAVE.EHZ. 2020-09-29T20:03:44.37 0.1 undecidable manual P 216 27.4503 92 -0.04 97
IV.NRCA.HHZ. 2020-09-29T20:03:43.18 0.3 undecidable manual S 166 6.6933 140 -0.15 74
IV.MC2.EHZ. 2020-09-29T20:03:43.83 0.3 undecidable manual S 74 7.9809 133 0.26 72
IV.CESI.HHZ. 2020-09-29T20:03:43.25 0.1 undecidable manual P 309 19.869 94 0.02 98
IV.CSP1.EHZ. 2020-09-29T20:03:43.80 0.1 undecidable manual P 22 23.9538 92 -0.06 96
IV.FDMO.HHZ. 2020-09-29T20:03:42.61 0.1 undecidable manual P 358 16.0728 98 -0.04 98
IV.MMO1.EHZ. 2020-09-29T20:03:42.96 0.1 undecidable manual P 87 18.9699 94 -0.13 97
IV.NRCA.HHZ. 2020-09-29T20:03:41.44 0.1 undecidable manual P 166 6.6933 140 0.05 100
IV.MC2.EHZ. 2020-09-29T20:03:41.75 0.1 undecidable manual P 74 7.9809 133 0.22 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.4 0.0003785 0.14 AML other m 2020-09-29T20:03:43.33
IV.NRCA.HHE. ML:1.2 0.000226 0.06 AML other m 2020-09-29T20:03:43.43
IV.FDMO.HHE. ML:0.8 0.00005025 0.74 AML other m 2020-09-29T20:03:45.52
IV.FDMO.HHN. ML:0.7 0.00004675 0.46 AML other m 2020-09-29T20:03:45.88
IV.CESI.HHE. ML:0.9 0.0000543 0.24 AML other m 2020-09-29T20:03:46.91
IV.CESI.HHN. ML:1.2 0.0001075 0.12 AML other m 2020-09-29T20:03:46.84
IV.GAVE.EHN. ML:0.9 0.0000446 0.26 AML other m 2020-09-29T20:03:48.77
IV.GAVE.EHE. ML:1.0 0.00005225 0.92 AML other m 2020-09-29T20:03:49.28
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