Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 19-12-2021 and time 21:10:03 (UTC) in region 7 km E Trevi (PG)

A magnitude ML 0.6 earthquake occured in region: 7 km E Trevi (PG), on

  • 19-12-2021 21:10:03 (UTC)
  • 19-12-2021 22:10:03 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8890, 12.8320 at 13 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 7 8469 8469
Sellano PG 8 1079 9548
Campello sul Clitunno PG 9 2442 11990
Cerreto di Spoleto PG 10 1075 13065
Foligno PG 13 57155 70220
Vallo di Nera PG 13 364 70584
Montefalco PG 15 5679 76263
Castel Ritaldi PG 15 3278 79541
Preci PG 17 724 80265
Sant'Anatolia di Narco PG 17 564 80829
Spello PG 17 8645 89474
Monte Cavallo MC 18 145 89619
Spoleto PG 19 38218 127837
Bevagna PG 19 5081 132918
Scheggino PG 20 461 133379
Valtopina PG 20 1398 134777

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km SE of Foligno (57155 inhabitants)
39 Km NE of Terni (111501 inhabitants)
43 Km SE of Perugia (166134 inhabitants)
76 Km NW of L'Aquila (69753 inhabitants)
76 Km W of Teramo (54892 inhabitants)
79 Km NE of Viterbo (67173 inhabitants)
98 Km SW of Ancona (100861 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
Reviewed
Rev100 		ML 0.6 2021-12-19
21:10:03		 42.889 12.8317 13 2021-12-19
21:15:38		 Sala Sismica INGV-Roma 98732981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-19 21:10:03 ± 0.04
Latitude 42.8890 ± 0.0018
Longitude 12.8317 ± 0.0037
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98732981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 280
Semi-minor axis of confidence ellipse (meter) 167
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 265
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 154
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.09
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32466
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 98732981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-19 21:15:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PP3.EHZ. 2021-12-19T21:10:20.65 3.0 positive manual P 0.06 0
IV.LNSS.HHE. 2021-12-19T21:10:16.15 0.3 undecidable manual S 152 36.0417 95 0.15 72
IV.FDMO.HHZ. 2021-12-19T21:10:13.31 0.6 undecidable manual S 52 26.4513 98 -0.15 49
IV.MML1.EHZ. 2021-12-19T21:10:13.75 0.6 undecidable manual S 24 27.3504 98 0.04 49
IV.NRCA.HHZ. 2021-12-19T21:10:12.61 0.6 undecidable manual S 105 23.754 100 -0.16 48
IV.ASSB.HHZ. 2021-12-19T21:10:12.24 0.6 undecidable manual S 321 22.0668 102 -0.08 50
IV.GAVE.EHZ. 2021-12-19T21:10:12.45 0.6 undecidable manual S 167 22.4553 101 0.05 50
IV.CESI.HHZ. 2021-12-19T21:10:10.32 0.6 undecidable manual S 25 14.1747 117 0 51
IV.LNSS.HHE. 2021-12-19T21:10:10.86 0.1 undecidable manual P 152 36.0417 95 -0.03 97
IV.MML1.EHZ. 2021-12-19T21:10:09.60 0.1 undecidable manual P 24 27.3504 98 0.03 99
IV.FDMO.HHZ. 2021-12-19T21:10:09.43 0.1 undecidable manual P 52 26.4513 98 0 100
IV.ASSB.HHZ. 2021-12-19T21:10:08.72 0.1 undecidable manual P 321 22.0668 102 -0.05 100
IV.GAVE.EHZ. 2021-12-19T21:10:08.86 0.3 undecidable manual P 167 22.4553 101 0.04 75
IV.NRCA.HHZ. 2021-12-19T21:10:08.95 0.1 undecidable manual P 105 23.754 100 -0.07 98
IV.CESI.HHZ. 2021-12-19T21:10:07.78 0.1 positive manual P 25 14.1747 117 0.17 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.2 0.000136 0.22 AML other m 2021-12-19T21:10:10.48
IV.CESI.HHE. ML:0.8 0.000048049999999999996 0.18 AML other m 2021-12-19T21:10:10.50
IV.GAVE.EHE. ML:0.9 0.000043950000000000004 0.44 AML other m 2021-12-19T21:10:12.90
IV.NRCA.HHN. ML:0.8 0.00004185 1.58 AML other m 2021-12-19T21:10:13.88
IV.GAVE.EHN. ML:0.7 0.000027700000000000002 1.22 AML other m 2021-12-19T21:10:13.18
IV.NRCA.HHE. ML:0.6 0.000026750000000000003 0.14 AML other m 2021-12-19T21:10:13.60
IV.ASSB.HHE. ML:0.4 0.000016578605 0.064 AML other m 2021-12-19T21:10:12.85
IV.ASSB.HHN. ML:0.4 0.0000170924615 0.0768 AML other m 2021-12-19T21:10:12.88
IV.FDMO.HHE. ML:0.3 0.0000102340595 0.1152 AML other m 2021-12-19T21:10:13.99
IV.FDMO.HHN. ML:0.3 0.00000938305905 0.1664 AML other m 2021-12-19T21:10:13.99
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