Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 30-09-2020 and time 22:43:01 (UTC) in region 3 km SW Trevi (PG)

A magnitude ML 0.5 earthquake occured in region: 3 km SW Trevi (PG), on

  • 30-09-2020 22:43:01 (UTC)
  • 01-10-2020 00:43:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8520, 12.7310 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
Trevi PG 3 8469 8469
Campello sul Clitunno PG 5 2442 10911
Castel Ritaldi PG 6 3278 14189
Montefalco PG 8 5679 19868
Foligno PG 12 57155 77023
Giano dell'Umbria PG 13 3846 80869
Spoleto PG 13 38218 119087
Bevagna PG 14 5081 124168
Vallo di Nera PG 14 364 124532
Cerreto di Spoleto PG 16 1075 125607
Gualdo Cattaneo PG 16 6155 131762
Sant'Anatolia di Narco PG 16 564 132326
Spello PG 17 8645 140971
Sellano PG 17 1079 142050
Scheggino PG 17 461 142511
Massa Martana PG 19 3770 146281

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km S of Foligno (57155 inhabitants)
33 Km N of Terni (111501 inhabitants)
40 Km SE of Perugia (166134 inhabitants)
70 Km NE of Viterbo (67173 inhabitants)
78 Km NW of L'Aquila (69753 inhabitants)
82 Km W of Teramo (54892 inhabitants)
95 Km N of Guidonia Montecelio (88673 inhabitants)
97 Km SE of Arezzo (99543 inhabitants)
99 Km N of Tivoli (56533 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 0.5 2020-09-30
22:43:01		 42.8517 12.7308 10 2020-09-30
22:49:31		 Sala Sismica INGV-Roma 83398691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-30 22:43:01 ± 0.05
Latitude 42.8517 ± 0.0027
Longitude 12.7308 ± 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 83398691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 345
Semi-minor axis of confidence ellipse (meter) 263
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 298
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.43887
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 13
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 83398691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-30 22:49:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LPEL.HHZ. 2020-09-30T22:43:45.22 3.0 undecidable manual S 0.05 0
IV.MMO1.EHZ. 2020-09-30T22:43:17.74 0.1 undecidable manual S 84 48.7179 50 0.28 89
IV.ATCC.EHZ. 2020-09-30T22:43:14.62 0.1 undecidable manual S 349 37.7289 50 0.1 95
IV.FDMO.HHZ. 2020-09-30T22:43:14.34 0.6 undecidable manual S 55 35.4423 50 0.43 44
IV.NRCA.HHZ. 2020-09-30T22:43:12.53 0.1 undecidable manual S 94 31.2465 50 -0.26 93
IV.ARRO.EHZ. 2020-09-30T22:43:12.74 0.1 undecidable manual S 175 30.3474 50 0.19 94
IV.CESX.HHZ. 2020-09-30T22:43:11.90 0.1 undecidable manual S 204 29.4483 50 -0.4 90
IV.MMO1.EHZ. 2020-09-30T22:43:10.68 0.6 negative manual P 84 48.7179 50 -0.1 46
IV.CSP1.EHZ. 2020-09-30T22:43:10.47 0.6 negative manual P 55 46.8198 50 -0.02 47
IV.GAVE.EHE. 2020-09-30T22:43:10.50 0.6 undecidable manual S 143 22.1556 113 0.47 45
IV.ATCC.EHZ. 2020-09-30T22:43:09.39 1.0 positive manual P 349 37.7289 50 0.3 23
IV.CESI.HHZ. 2020-09-30T22:43:09.79 0.1 undecidable manual S 40 22.0668 113 -0.24 95
IV.ASSB.HHZ. 2020-09-30T22:43:09.82 0.3 undecidable manual S 345 21.9669 114 -0.17 72
IV.ARRO.EHZ. 2020-09-30T22:43:08.24 1.0 undecidable manual P 175 30.3474 50 0.29 23
IV.FDMO.HHZ. 2020-09-30T22:43:08.56 1.0 negative manual P 55 35.4423 50 -0.18 23
IT.FOPC.HGE. 2020-09-30T22:43:07.40 0.1 undecidable manual S 350 13.2756 126 0.04 100
IV.MOMA.HHZ. 2020-09-30T22:43:07.62 0.3 undecidable manual S 248 14.0748 124 0.03 75
IV.CESX.HHZ. 2020-09-30T22:43:07.52 1.0 undecidable manual P 204 29.4483 50 -0.28 23
IV.NRCA.HHZ. 2020-09-30T22:43:07.91 0.6 negative manual P 94 31.2465 50 -0.18 47
IV.CESI.HHZ. 2020-09-30T22:43:06.41 0.1 undecidable manual P 40 22.0668 113 -0.09 98
IV.ASSB.HHZ. 2020-09-30T22:43:06.47 0.1 undecidable manual P 345 21.9669 114 0 99
IV.GAVE.EHE. 2020-09-30T22:43:06.27 0.3 undecidable manual P 143 22.1556 113 -0.22 71
IT.FOPC.HGE. 2020-09-30T22:43:05.11 0.1 undecidable manual P 350 13.2756 126 0.16 98
IT.GNU.HGN. 2020-09-30T22:43:05.28 0.1 undecidable manual P 248 14.0748 124 0.2 97
IV.MOMA.HHZ. 2020-09-30T22:43:05.04 0.3 positive manual P 248 14.0748 124 -0.05 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHE. ML:0.8 0.000063088135 0.1664 AML other m 2020-09-30T22:43:07.83
IV.MOMA.HHN. ML:0.8 0.000060048270000000004 0.128 AML other m 2020-09-30T22:43:08.31
IV.CESI.HHE. ML:0.4 0.000015339765 0.064 AML other m 2020-09-30T22:43:10.50
IV.CESI.HHN. ML:0.6 0.000024469865000000002 0.1152 AML other m 2020-09-30T22:43:11.07
IV.ASSB.HHE. ML:0.6 0.000022963535 0.0896 AML other m 2020-09-30T22:43:11.02
IV.ASSB.HHN. ML:0.5 0.000020896285 0.0768 AML other m 2020-09-30T22:43:10.62
IV.CESX.HHE. ML:0.3 0.000010945966500000002 0.2432 AML other m 2020-09-30T22:43:13.35
IV.CESX.HHN. ML:0.6 0.000017604915 0.2048 AML other m 2020-09-30T22:43:14.01
IV.NRCA.HHE. ML:0.7 0.000025486969999999996 0.1024 AML other m 2020-09-30T22:43:13.77
IV.NRCA.HHN. ML:0.8 0.000031188355 0.0768 AML other m 2020-09-30T22:43:13.72
IV.ARRO.EHE. ML:0.3 0.000010513165000000002 0.1792 AML other m 2020-09-30T22:43:14.51
IV.ARRO.EHN. ML:0.3 0.000007540858500000001 0.2176 AML other m 2020-09-30T22:43:16.56
IV.FDMO.HHE. ML:0.4 0.0000082775475 0.2432 AML other m 2020-09-30T22:43:15.67
IV.FDMO.HHN. ML:0.1 0.0000066486982 0.1408 AML other m 2020-09-30T22:43:16.26
IV.ATCC.EHE. ML:0.6 0.0000129908785 0.2432 AML other m 2020-09-30T22:43:15.60
IV.ATCC.EHN. ML:0.4 0.0000095383805 0.128 AML other m 2020-09-30T22:43:16.79
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