Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 1.2 on date 20-01-2022 and time 07:34:19 (UTC) in region 3 km E Trevi (PG)

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

  • 20-01-2022 07:34:19 (UTC)
  • 20-01-2022 08:34:19 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8890, 12.7780 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 3 8469 8469
Campello sul Clitunno PG 8 2442 10911
Foligno PG 10 57155 68066
Montefalco PG 10 5679 73745
Castel Ritaldi PG 11 3278 77023
Sellano PG 12 1079 78102
Cerreto di Spoleto PG 14 1075 79177
Spello PG 15 8645 87822
Bevagna PG 15 5081 92903
Vallo di Nera PG 15 364 93267
Spoleto PG 17 38218 131485
Giano dell'Umbria PG 17 3846 135331
Sant'Anatolia di Narco PG 18 564 135895
Gualdo Cattaneo PG 18 6155 142050
Valtopina PG 19 1398 143448
Cannara PG 20 4305 147753
Scheggino PG 20 461 148214

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km SE of Foligno (57155 inhabitants)
38 Km N of Terni (111501 inhabitants)
40 Km SE of Perugia (166134 inhabitants)
76 Km NE of Viterbo (67173 inhabitants)
78 Km NW of L'Aquila (69753 inhabitants)
80 Km W of Teramo (54892 inhabitants)
97 Km SE of Arezzo (99543 inhabitants)
99 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
Bulletin
Rev1000 		ML 1.2 2022-01-20
07:34:19		 42.8888 12.7783 1 2022-07-08
12:33:43		 Bollettino Sismico Italiano INGV 103127231
Reviewed
Rev100 		ML 1.2 2022-01-20
07:34:19		 42.9093 12.7695 8 2022-01-20
07:41:14		 Sala Sismica INGV-Roma 99967351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-01-20 07:34:19 ± 0.15
Latitude 42.8888 ± 0.0090
Longitude 12.7783 ± 0.0135
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 103127231

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1120
Semi-minor axis of confidence ellipse (meter) 960
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 306
Circular confidence region, given by single value of horizontal uncertainty (meter) 1120.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.14839
Epicentral distance of station farthest from the epicenter (degree) 0.26980
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 103127231
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-04-12 16:30:35

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 99967351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-01-20 07:41:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MML1.HNZ. 2022-01-20T07:34:25.34 0.3 undecidable manual P 32 29.4483 91 -0.09 98
IV.FDMO.HHZ. 2022-01-20T07:34:25.62 0.3 undecidable manual P 57 29.9478 91 0.09 98
IV.GAVE.EHZ. 2022-01-20T07:34:24.46 0.3 undecidable manual P 157 23.754 91 0.17 97
IV.NRCA.HHZ. 2022-01-20T07:34:24.66 0.3 undecidable manual P 103 27.9498 91 -0.47 90
IV.CESI.HHZ. 2022-01-20T07:34:23.28 0.3 undecidable manual P 38 16.4724 92 0.45 93
IV.ASSB.HHZ. 2022-01-20T07:34:23.21 0.3 undecidable manual P 330 19.6692 91 -0.25 96
IV.MOMA.HNE. 2022-01-20T07:34:23.48 0.3 undecidable manual P 241 19.3695 91 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:1.3 0.00017449999999999999 0.28 AML other m 2022-01-20T07:34:27.85
IV.CESI.HHN. ML:1.1 0.000145 0.3 AML other m 2022-01-20T07:34:28.54
IV.CESI.HHE. ML:0.9 0.00008965000000000001 0.28 AML other m 2022-01-20T07:34:28.94
IV.ASSB.HHN. ML:1.3 0.000165 0.28 AML other m 2022-01-20T07:34:29.09
IV.GAVE.EHE. ML:1.3 0.00013550000000000001 0.36 AML other m 2022-01-20T07:34:30.37
IV.GUMA.HHE. ML:1.7 0.000125 0.46 AML other m 2022-01-20T07:34:30.36
IV.NRCA.HHN. ML:1.0 0.0000498 0.3 AML other m 2022-01-20T07:34:31.57
IV.FDMO.HHN. ML:1.2 0.00007725 0.3 AML other m 2022-01-20T07:34:31.43
IV.FDMO.HHE. ML:1.2 0.0000771 1.06 AML other m 2022-01-20T07:34:32.71
IV.GAVE.EHN. ML:1.2 0.0001132 0.42 AML other m 2022-01-20T07:34:32.25
IV.GUMA.HHN. ML:1.7 0.0001375 0.48 AML other m 2022-01-20T07:34:32.66
IV.NRCA.HHE. ML:1.0 0.0000539 1.2 AML other m 2022-01-20T07:34:33.13
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