Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 25-08-2020 and time 09:28:32 (Italy) in region 3 km NE Trevi (PG)

A magnitude ML 1.2 earthquake occured in region: 3 km NE Trevi (PG), on

  • 25-08-2020 07:28:32 (UTC)
  • 25-08-2020 09:28:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8990, 12.7660 at 8 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
Foligno PG 8 57155 65624
Campello sul Clitunno PG 9 2442 68066
Montefalco PG 9 5679 73745
Castel Ritaldi PG 11 3278 77023
Spello PG 13 8645 85668
Sellano PG 13 1079 86747
Bevagna PG 13 5081 91828
Cerreto di Spoleto PG 15 1075 92903
Vallo di Nera PG 16 364 93267
Giano dell'Umbria PG 17 3846 97113
Gualdo Cattaneo PG 17 6155 103268
Valtopina PG 18 1398 104666
Spoleto PG 18 38218 142884
Cannara PG 18 4305 147189
Sant'Anatolia di Narco PG 19 564 147753

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km SE of Foligno (57155 inhabitants)
39 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)
81 Km W of Teramo (54892 inhabitants)
96 Km SE of Arezzo (99543 inhabitants)
100 Km N of Guidonia Montecelio (88673 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 2020-08-25
07:28:32		 42.8988 12.7662 8 2020-08-25
07:36:49		 Sala Sismica INGV-Roma 82308011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-25 07:28:32 ± 0.14
Latitude 42.8988 ± 0.0072
Longitude 12.7662 ± 0.0074
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82308011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 709
Semi-minor axis of confidence ellipse (meter) 482
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) 710.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.16368
Epicentral distance of station farthest from the epicenter (degree) 0.62773
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 82308011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-25 07:36:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2020-08-25T07:28:50.95 0.1 undecidable manual S 30 54.9006 50 0.54 84
IV.MNTT.EHZ. 2020-08-25T07:28:44.82 0.6 positive manual P 75 69.6747 50 -0.35 43
IV.NRCA.HHZ. 2020-08-25T07:28:43.38 0.1 undecidable manual S 104 29.2485 106 0.23 95
IV.FDMO.HHZ. 2020-08-25T07:28:43.64 0.1 undecidable manual S 60 30.2475 105 0.15 96
IV.EL6.EHZ. 2020-08-25T07:28:42.51 0.1 undecidable manual P 30 54.9006 50 -0.39 88
IV.MOMA.HHZ. 2020-08-25T07:28:40.16 0.1 undecidable manual S 237 19.0698 113 0.32 95
IV.ASSB.HHZ. 2020-08-25T07:28:39.60 0.1 undecidable manual S 331 18.1707 114 0.06 100
IV.NRCA.HHZ. 2020-08-25T07:28:38.46 0.1 positive manual P 104 29.2485 106 -0.25 94
IV.FDMO.HHZ. 2020-08-25T07:28:38.57 0.6 positive manual P 60 30.2475 105 -0.33 46
IV.ASSB.HHZ. 2020-08-25T07:28:36.33 0.3 positive manual P 331 18.1707 114 -0.29 72
IV.MOMA.HHZ. 2020-08-25T07:28:36.56 0.6 negative manual P 237 19.0698 113 -0.23 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:1.2 0.0001235 0.86 AML other m 2020-08-25T07:28:41.02
IV.ASSB.HHE. ML:1.0 0.00008885 0.22 AML other m 2020-08-25T07:28:41.55
IV.MOMA.HHE. ML:1.2 0.0001325 0.28 AML other m 2020-08-25T07:28:41.49
IV.MOMA.HHN. ML:1.1 0.00009334999999999999 1.02 AML other m 2020-08-25T07:28:42.22
IV.NRCA.HHE. ML:1.1 0.000062 0.86 AML other m 2020-08-25T07:28:43.35
IV.FDMO.HHE. ML:1.0 0.00005155 0.28 AML other m 2020-08-25T07:28:44.46
IV.NRCA.HHN. ML:1.1 0.0000596 0.9 AML other m 2020-08-25T07:28:44.89
IV.FDMO.HHN. ML:1.3 0.00008895000000000001 1.6 AML other m 2020-08-25T07:28:44.09
IV.ATVO.HHN. ML:1.4 0.000045350000000000005 1.44 AML other m 2020-08-25T07:28:54.94
IV.ATVO.HHE. ML:1.3 0.0000388 0.44 AML other m 2020-08-25T07:28:58.35
IV.PIEI.HHN. ML:1.3 0.0000283 1.78 AML other m 2020-08-25T07:28:58.97
IV.PIEI.HHE. ML:1.5 0.00005435 0.26 AML other m 2020-08-25T07:28:59.19
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