Earthquake with magnitude of ML 1.3 on date 31-07-2020 and time 09:53:13 (UTC) in region 3 km NE Trevi (PG)

A magnitude ML 1.3 earthquake occured in region: 3 km NE Trevi (PG), on

  • 31-07-2020 09:53:13 (UTC)
  • 31-07-2020 11:53:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9, 12.76 at 9 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.

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
Foligno PG 8 57155 65624
Montefalco PG 9 5679 71303
Campello sul Clitunno PG 9 2442 73745
Castel Ritaldi PG 11 3278 77023
Spello PG 13 8645 85668
Bevagna PG 13 5081 90749
Sellano PG 14 1079 91828
Cerreto di Spoleto PG 16 1075 92903
Gualdo Cattaneo PG 17 6155 99058
Giano dell'Umbria PG 17 3846 102904
Vallo di Nera PG 17 364 103268
Valtopina PG 18 1398 104666
Cannara PG 18 4305 108971
Spoleto PG 19 38218 147189
Sant'Anatolia di Narco PG 20 564 147753

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km SE of Foligno (57155 inhabitants)
38 Km SE of Perugia (166134 inhabitants)
39 Km N of Terni (111501 inhabitants)
76 Km NE of Viterbo (67173 inhabitants)
80 Km NW of L'Aquila (69753 inhabitants)
82 Km W of Teramo (54892 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
100 Km N of Guidonia Montecelio (88673 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.3 2020-07-31
09:53:13
42.9 12.76 9 2020-07-31
10:07:58
Sala Sismica INGV-Roma 81504741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-31 09:53:13 ± 0.08
Latitude 42.90 ± 0.00
Longitude 12.76 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81504741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 414
Semi-minor axis of confidence ellipse (meter) 207
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 84
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.36243
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 81504741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-31 10:07:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SARZ.HHZ. 2020-07-31T09:54:59.23 3.0 undecidable manual Sg 12.04 0
IV.CAR1.HHZ. 2020-07-31T09:54:34.33 3.0 positive manual Pg 15.1 0
IV.NOV.HHZ. 2020-07-31T09:54:31.31 3.0 negative manual Pn 1.4 0
IV.MRLC.HHZ. 2020-07-31T09:54:31.08 3.0 undecidable manual Sn -4.63 0
AC.VLO.HHZ. 2020-07-31T09:54:30.82 3.0 positive manual Pn -1.94 0
IV.EUCT.HNZ. 2020-07-31T09:54:11.55 3.0 negative manual Pg 6.54 0
IV.SARZ.HHZ. 2020-07-31T09:54:10.96 3.0 negative manual Pg 6.62 0
IV.NDIM.HNZ. 2020-07-31T09:53:49.42 3.0 positive manual Pn 0.1 0
TV.SF01.EHZ. 2020-07-31T09:53:30.58 3.0 undecidable manual P -1.33 0
IV.LNSS.HNE. 2020-07-31T09:53:27.61 0.1 undecidable manual S 146 0.3624 50 0.21 92
IV.SRES.HHZ. 2020-07-31T09:53:26.03 3.0 negative manual P -2.78 0
IV.ARVD.HHZ. 2020-07-31T09:53:26.49 3.0 undecidable manual S 0
IV.SACS.HNZ. 2020-07-31T09:53:25.34 3.0 undecidable manual P -1.85 0
IV.ATCC.EHZ. 2020-07-31T09:53:25.68 0.1 undecidable manual S 342 0.2959 50 0.24 93
IV.NRCA.HHZ. 2020-07-31T09:53:24.63 0.1 undecidable manual S 105 0.2662 107 0.12 96
IV.FDMO.HHZ. 2020-07-31T09:53:24.93 0.1 undecidable manual S 61 0.2716 107 0.21 94
IV.MML1.EHN. 2020-07-31T09:53:24.37 0.1 undecidable manual S 36 0.2599 108 0.1 97
IV.GAVE.EHZ. 2020-07-31T09:53:23.35 0.1 undecidable manual S 155 0.2311 110 0.12 97
IV.LNSS.HNE. 2020-07-31T09:53:21.36 0.1 undecidable manual P 146 0.3624 50 -0.28 91
IV.MOMA.HHZ. 2020-07-31T09:53:21.54 0.1 undecidable manual S 235 0.1727 115 0.4 92
IV.CESX.HHE. 2020-07-31T09:53:21.60 1.0 undecidable manual P 204 0.322 50 0.66 20
IV.ATCC.EHZ. 2020-07-31T09:53:20.35 0.6 undecidable manual P 342 0.2959 50 -0.16 48
IV.CESI.HNN. 2020-07-31T09:53:20.77 0.1 undecidable manual S 45 0.1448 120 0.57 88
IV.ASSB.HHZ. 2020-07-31T09:53:20.70 0.1 undecidable manual S 331 0.1592 117 0.03 100
IV.ARVD.HHZ. 2020-07-31T09:53:20.73 3.0 undecidable manual P 0
IV.FDMO.HHZ. 2020-07-31T09:53:19.82 0.1 undecidable manual P 61 0.2716 107 -0.27 93
IV.MML1.EHN. 2020-07-31T09:53:19.57 0.1 undecidable manual P 36 0.2599 108 -0.26 93
IV.GAVE.EHZ. 2020-07-31T09:53:19.13 0.1 undecidable manual P 155 0.2311 110 -0.11 97
IV.NRCA.HHZ. 2020-07-31T09:53:19.75 0.1 undecidable manual P 105 0.2662 107 -0.22 94
IV.MNTT.EHZ. 2020-07-31T09:53:18.95 3.0 negative manual P -0.05 0
IV.FEMA.HNE. 2020-07-31T09:53:18.89 1.0 undecidable manual P 74 0.2176 111 -0.06 25
IV.CESI.HNN. 2020-07-31T09:53:17.58 0.1 undecidable manual P 45 0.1448 120 0.09 99
IT.GNU.HGZ. 2020-07-31T09:53:17.04 1.0 undecidable manual P 235 0.1727 115 -0.99 18
IV.ASSB.HHZ. 2020-07-31T09:53:17.46 0.1 undecidable manual P 331 0.1592 117 -0.3 95
IT.MTCL.HGE. 2020-07-31T09:53:17.83 0.3 undecidable manual P 62 0.1952 113 -0.65 63
IV.MOMA.HHZ. 2020-07-31T09:53:17.98 0.3 negative manual P 235 0.1727 115 -0.05 74
IV.MF5.EHZ. 2020-07-31T09:53:15.74 3.0 negative manual P -1.37 0
IV.FOSV.EHZ. 2020-07-31T09:53:13.06 3.0 negative manual P -2.38 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:1.5 0.000244 0.22 AML other m 2020-07-31T09:53:21.59
IV.ASSB.HHE. ML:1.3 0.000185 0.9 AML other m 2020-07-31T09:53:21.44
IV.MOMA.HHN. ML:1.4 0.000174 0.28 AML other m 2020-07-31T09:53:22.25
IV.ARVD.HHE. ML:1.2 2.275E-5 0.06 AML other m 2020-07-31T09:53:22.63
IV.MOMA.HHE. ML:1.4 0.0001985 0.26 AML other m 2020-07-31T09:53:25.54
IV.MNTT.EHN. ML:2.2 0.000248 0.64 AML other m 2020-07-31T09:53:26.37
IV.NRCA.HHE. ML:1.3 0.00010705 1.78 AML other m 2020-07-31T09:53:27.95
IV.NRCA.HHN. ML:1.2 6.815E-5 0.98 AML other m 2020-07-31T09:53:27.43
IV.ARVD.HHN. ML:1.1 1.99E-5 0.36 AML other m 2020-07-31T09:53:28.79
IV.ATCC.EHE. ML:1.3 9.385E-5 0.38 AML other m 2020-07-31T09:53:31.75
IV.ATCC.EHN. ML:1.1 6.105E-5 0.72 AML other m 2020-07-31T09:53:33.58
IV.SACS.HNE. ML:3 0.001541 0.4 AML other m 2020-07-31T09:53:33.09
IV.MNTT.EHE. ML:2 0.0001515 0.42 AML other m 2020-07-31T09:53:37.54
IV.SACS.HNN. ML:3 0.001944 0.46 AML other m 2020-07-31T09:53:42.63
IV.SARZ.HHE. ML:3.2 0.0001147 0.42 AML other m 2020-07-31T09:55:11.94
IV.SARZ.HHN. ML:3.4 0.000188 0.72 AML other m 2020-07-31T09:55:20.59
IV.EUCT.HNE. ML:4.2 0.001145 0.28 AML other m 2020-07-31T09:55:21.74
IV.EUCT.HNN. ML:4.1 0.000886 0.82 AML other m 2020-07-31T09:55:21.54
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download