Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 1.1 on date 03-09-2020 and time 09:12:26 (Italy) in region 4 km NE Trevi (PG)

A magnitude ML 1.1 (quarry blast) earthquake occured in region: 4 km NE Trevi (PG), on

  • 03-09-2020 07:12:26 (UTC)
  • 03-09-2020 09:12:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9070, 12.7740 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

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 4 8469 8469
Foligno PG 8 57155 65624
Campello sul Clitunno PG 10 2442 68066
Montefalco PG 10 5679 73745
Castel Ritaldi PG 12 3278 77023
Spello PG 13 8645 85668
Sellano PG 13 1079 86747
Bevagna PG 14 5081 91828
Cerreto di Spoleto PG 15 1075 92903
Vallo di Nera PG 17 364 93267
Valtopina PG 17 1398 94665
Gualdo Cattaneo PG 18 6155 100820
Giano dell'Umbria PG 18 3846 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)
40 Km N of Terni (111501 inhabitants)
77 Km NE of Viterbo (67173 inhabitants)
80 Km NW of L'Aquila (69753 inhabitants)
81 Km W of Teramo (54892 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
100 Km SW of Ancona (100861 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
Bulletin
Rev1000 		ML 1.1 2020-09-03
07:12:26		 42.9073 12.7735 1 2021-02-26
14:56:10		 Bollettino Sismico Italiano INGV 85334101
Reviewed
Rev100 		ML 1.2 2020-09-03
07:12:25		 42.8993 12.7642 9 2020-09-03
07:19:32		 Sala Sismica INGV-Roma 82582521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-03 07:12:26 ± 0.11
Latitude 42.9073 ± 0.0072
Longitude 12.7735 ± 0.0086
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 85334101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 790
Semi-minor axis of confidence ellipse (meter) 730
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 30
Circular confidence region, given by single value of horizontal uncertainty (meter) 790.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.48473
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 82582521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-03 07:19:32

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 85334101
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-10 10:24:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
MN.PDG.HHZ. 2020-09-03T07:14:38.60 3.0 undecidable manual Sn 0.32 0
HL.VLS.HHZ. 2020-09-03T07:14:37.42 3.0 positive manual Pg 22.43 0
IV.PZUN.HHZ. 2020-09-03T07:14:22.42 3.0 undecidable manual Sg 17.559999 0
SL.KOGS.BHZ. 2020-09-03T07:14:06.82 3.0 undecidable manual Sn 4.53 0
GU.BLANC.HHZ. 2020-09-03T07:14:06.99 3.0 undecidable manual Sg 10.75 0
XK.ALB1.HHZ. 2020-09-03T07:13:54.67 3.0 undecidable manual Pg 17.629999 0
IV.FERC.HNZ. 2020-09-03T07:13:52.94 3.0 undecidable manual Pg 12.22 0
IV.TDS.HHZ. 2020-09-03T07:13:48.53 3.0 negative manual Pg 20.08 0
IV.CMPR.HHZ. 2020-09-03T07:13:25.44 3.0 positive manual Pg 10.86 0
SL.KOGS.BHZ. 2020-09-03T07:13:22.67 3.0 undecidable manual Pg 9.51 0
CR.ZAG.BHZ. 2020-09-03T07:13:11.28 3.0 undecidable manual Pn 5.15 0
IV.ROSPO.HHZ. 2020-09-03T07:12:55.09 3.0 undecidable manual Pn 1.51 0
IV.VVLD.HHZ. 2020-09-03T07:12:51.57 3.0 negative manual Pg 4.49 0
IV.VOBA.HNZ. 2020-09-03T07:12:44.84 3.0 undecidable manual Pg 1.05 0
IV.CAPR.HNZ. 2020-09-03T07:12:44.63 3.0 undecidable manual Pn -1.73 0
IV.EL6.EHZ. 2020-09-03T07:12:36.44 0.3 undecidable manual P 29 53.8017 91 -0.56 62
IV.MC2.EHZ. 2020-09-03T07:12:33.27 0.6 undecidable manual P 89 33.744 91 0.28 46
IV.FDMO.HHZ. 2020-09-03T07:12:32.03 0.3 undecidable manual P 61 29.2485 91 -0.05 73
IV.NRCA.HHZ. 2020-09-03T07:12:31.91 0.1 undecidable manual P 106 28.8489 91 -0.1 96
IV.GAVE.EHZ. 2020-09-03T07:12:31.30 0.1 undecidable manual P 158 25.8519 91 -0.09 97
IV.MOMA.HHZ. 2020-09-03T07:12:30.34 0.1 undecidable manual P 235 20.1687 91 0.08 98
IV.CESI.HHE. 2020-09-03T07:12:29.81 0.3 undecidable manual P 44 15.1737 92 0.55 67
IV.ASSB.HHZ. 2020-09-03T07:12:29.75 0.1 undecidable manual P 328 17.6712 92 -0.01 100
IT.FOPC.HGN. 2020-09-03T07:12:28.02 0.3 undecidable manual P 320 8.9799 93 0 76
IV.PE3.EHZ. 2020-09-03T07:12:25.07 3.0 negative manual P 2.57 0
TV.SF01.EHZ. 2020-09-03T07:12:23.77 3.0 undecidable manual P -3.7 0
IV.APEC.HHZ. 2020-09-03T07:12:21.18 3.0 undecidable manual P -0.74 0
IV.CPGN.EHZ. 2020-09-03T07:12:16.28 3.0 undecidable manual P -4.05 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:1.1 0.0001295 0.24 AML other m 2020-09-03T07:12:33.54
IV.ASSB.HHE. ML:1.1 0.000117 0.26 AML other m 2020-09-03T07:12:33.85
IV.MOMA.HHE. ML:1.1 0.0001064 1.68 AML other m 2020-09-03T07:12:34.85
IV.MOMA.HHN. ML:1.1 0.00009554999999999999 0.42 AML other m 2020-09-03T07:12:36.34
IV.GAVE.EHE. ML:1.3 0.000131 0.3 AML other m 2020-09-03T07:12:37.98
IV.FDMO.HHN. ML:1.3 0.0000998 0.36 AML other m 2020-09-03T07:12:38.52
IV.GAVE.EHN. ML:1.1 0.00007264999999999999 1.68 AML other m 2020-09-03T07:12:39.15
IV.FDMO.HHE. ML:1.0 0.000048899999999999996 0.38 AML other m 2020-09-03T07:12:39.59
IV.NRCA.HHN. ML:0.8 0.00003505 0.9 AML other m 2020-09-03T07:12:39.83
IV.NRCA.HHE. ML:0.8 0.00003075 1.34 AML other m 2020-09-03T07:12:41.25
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