Earthquake with magnitude of ML 1.2 on date 04-12-2020 and time 13:50:22 (Italy) in region 4 km SW Trevi (PG)

A magnitude ML 1.2 earthquake occured in region: 4 km SW Trevi (PG), on

  • 04-12-2020 12:50:22 (UTC)
  • 04-12-2020 13:50:22 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.86, 12.71 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 4 8469 8469
Castel Ritaldi PG 5 3278 11747
Montefalco PG 7 5679 17426
Campello sul Clitunno PG 7 2442 19868
Giano dell'Umbria PG 11 3846 23714
Foligno PG 11 57155 80869
Bevagna PG 12 5081 85950
Spoleto PG 14 38218 124168
Gualdo Cattaneo PG 14 6155 130323
Vallo di Nera PG 16 364 130687
Spello PG 16 8645 139332
Sant'Anatolia di Narco PG 17 564 139896
Cerreto di Spoleto PG 17 1075 140971
Massa Martana PG 18 3770 144741
Sellano PG 18 1079 145820
Scheggino PG 19 461 146281
Cannara PG 19 4305 150586

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km S of Foligno (57155 inhabitants)
33 Km N of Terni (111501 inhabitants)
38 Km SE of Perugia (166134 inhabitants)
69 Km NE of Viterbo (67173 inhabitants)
79 Km NW of L'Aquila (69753 inhabitants)
84 Km W of Teramo (54892 inhabitants)
95 Km N of Guidonia Montecelio (88673 inhabitants)
96 Km SE of Arezzo (99543 inhabitants)
99 Km N of Tivoli (56533 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 1.2 2020-12-04
12:50:22
42.85 12.71 9 2020-12-04
12:56:26
Sala Sismica INGV-Roma 85198321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-04 12:50:22 ± 0.05
Latitude 42.85 ± 0.00
Longitude 12.71 ± 0.00
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 85198321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 490
Semi-minor axis of confidence ellipse (meter) 276
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 302
Circular confidence region, given by single value of horizontal uncertainty (meter) 490
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.44157
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 85198321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-04 12:56:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VIVA.HHZ. 2020-12-04T12:50:44.62 3.0 undecidable manual P 0.66 0
IV.SRES.HHZ. 2020-12-04T12:50:34.07 3.0 negative manual P -1.5 0
IV.FDMO.HHZ. 2020-12-04T12:50:34.81 0.6 undecidable manual S 57 0.3301 50 -0.25 61
IV.NRCA.HHZ. 2020-12-04T12:50:34.10 0.6 undecidable manual S 94 0.2968 50 0.03 65
IV.CSP1.EHZ. 2020-12-04T12:50:31.85 1.0 undecidable manual P 57 0.4317 50 0.4 29
IV.MGAB.HNE. 2020-12-04T12:50:31.84 1.0 undecidable manual P 278 0.4416 50 0.22 30
IV.ASSB.HHZ. 2020-12-04T12:50:30.37 0.6 undecidable manual S 349 0.1916 113 -0.03 66
IV.CESI.HHZ. 2020-12-04T12:50:30.98 0.6 undecidable manual S 43 0.2068 112 0.04 66
IV.MC2.EHE. 2020-12-04T12:50:30.23 0.6 undecidable manual P 81 0.3552 50 0.1 63
IV.MML1.EHZ. 2020-12-04T12:50:29.47 1.0 undecidable manual P 36 0.3211 50 -0.08 32
IV.FDMO.HHZ. 2020-12-04T12:50:29.80 1.0 negative manual P 57 0.3301 50 0.1 32
IV.NRCA.HHZ. 2020-12-04T12:50:29.03 0.6 undecidable manual P 94 0.2968 50 -0.1 64
IV.LNSS.HHZ. 2020-12-04T12:50:29.94 0.6 undecidable manual P 136 0.3489 50 -0.09 63
IV.ATCC.EHZ. 2020-12-04T12:50:29.74 3.0 undecidable manual Pg -0.14 0
IV.CESI.HHZ. 2020-12-04T12:50:27.42 1.0 undecidable manual P 43 0.2068 112 0.1 32
IV.MOMA.HHZ. 2020-12-04T12:50:27.60 0.6 undecidable manual S 244 0.1151 125 -0.22 65
IV.ASSB.HHZ. 2020-12-04T12:50:26.97 0.3 undecidable manual P 349 0.1916 113 -0.04 99
IV.MOMA.HHZ. 2020-12-04T12:50:25.58 0.3 negative manual P 244 0.1151 125 0.06 100
IT.GNU.HGE. 2020-12-04T12:50:25.79 1.0 undecidable manual P 244 0.1151 125 0.27 32
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHE. ML:1.4 0.0002946243 0.1792 AML other m 2020-12-04T12:50:28.71
IV.MOMA.HHN. ML:1.2 0.00016348795 0.1152 AML other m 2020-12-04T12:50:28.64
IV.MOMA.HNE. ML:1.4 0.00029747845 0.1664 AML other m 2020-12-04T12:50:28.71
IV.MOMA.HNN. ML:1.1 0.000156405345 0.1984 AML other m 2020-12-04T12:50:30.63
IV.ASSB.HHE. ML:1 6.784628E-5 0.0768 AML other m 2020-12-04T12:50:31.02
IV.ASSB.HHN. ML:1.1 9.131408E-5 0.16 AML other m 2020-12-04T12:50:30.81
IV.CESI.HHE. ML:0.7 3.425902E-5 0.1408 AML other m 2020-12-04T12:50:31.32
IV.CESI.HHN. ML:1 6.4751275E-5 0.1792 AML other m 2020-12-04T12:50:33.16
IV.CESI.HNE. ML:1.1 9.24583E-5 0.4736 AML other m 2020-12-04T12:50:36.28
IV.CESI.HNN. ML:1.7 0.00029791155 0.2944 AML other m 2020-12-04T12:50:30.15
IV.NRCA.HHE. ML:1.3 8.520832E-5 0.16 AML other m 2020-12-04T12:50:36.03
IV.NRCA.HHN. ML:1.2 6.441868E-5 0.1408 AML other m 2020-12-04T12:50:38.49
IV.NRCA.HNE. ML:1.5 0.00012634595 0.5824 AML other m 2020-12-04T12:50:30.16
IV.NRCA.HNN. ML:1.8 0.00024333355 0.7488 AML other m 2020-12-04T12:50:36.54
IV.ATCC.EHE. ML:1.1 5.175551E-5 0.1984 AML other m 2020-12-04T12:50:36.02
IV.ATCC.EHN. ML:1 3.565686E-5 0.1408 AML other m 2020-12-04T12:50:35.57
IV.FDMO.HHE. ML:1 3.49238E-5 0.2624 AML other m 2020-12-04T12:50:37.99
IV.FDMO.HHN. ML:0.9 2.768708E-5 0.1984 AML other m 2020-12-04T12:50:38.27
IV.LNSS.HHE. ML:1.3 6.633445E-5 0.1216 AML other m 2020-12-04T12:50:38.15
IV.LNSS.HHN. ML:1.1 4.408152E-5 0.1344 AML other m 2020-12-04T12:50:38.49
IV.LNSS.HNE. ML:1.5 0.000120924775 0.64 AML other m 2020-12-04T12:50:43.79
IV.LNSS.HNN. ML:1.6 0.0001489622 0.6336 AML other m 2020-12-04T12:50:39.19
IV.CSP1.EHE. ML:1.4 6.93426285E-5 1.7216 AML other m 2020-12-04T12:50:53.09
IV.CSP1.EHN. ML:1.4 7.0462265E-5 0.16 AML other m 2020-12-04T12:50:38.76
IV.VIVA.HHE. ML:2.7 0.00036105275 0.0832 AML other m 2020-12-04T12:50:45.13
IV.VIVA.HHN. ML:2.6 0.00030200325 0.1984 AML other m 2020-12-04T12:50:46.26
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