Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 16-10-2020 and time 13:05:21 (UTC) in region 4 km W Trevi (PG)

A magnitude ML 0.6 earthquake occured in region: 4 km W Trevi (PG), on

  • 16-10-2020 13:05:21 (UTC)
  • 16-10-2020 15:05:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8630, 12.7000 at 10 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 4 8469 8469
Castel Ritaldi PG 5 3278 11747
Montefalco PG 5 5679 17426
Campello sul Clitunno PG 8 2442 19868
Giano dell'Umbria PG 10 3846 23714
Foligno PG 11 57155 80869
Bevagna PG 11 5081 85950
Gualdo Cattaneo PG 13 6155 92105
Spoleto PG 15 38218 130323
Spello PG 15 8645 138968
Vallo di Nera PG 17 364 139332
Massa Martana PG 17 3770 143102
Cannara PG 18 4305 147407
Sant'Anatolia di Narco PG 18 564 147971
Cerreto di Spoleto PG 18 1075 149046
Sellano PG 19 1079 150125
Scheggino PG 20 461 150586

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km S of Foligno (57155 inhabitants)
34 Km N of Terni (111501 inhabitants)
37 Km SE of Perugia (166134 inhabitants)
69 Km NE of Viterbo (67173 inhabitants)
81 Km NW of L'Aquila (69753 inhabitants)
85 Km W of Teramo (54892 inhabitants)
94 Km SE of Arezzo (99543 inhabitants)
96 Km N of Guidonia Montecelio (88673 inhabitants)
100 Km N of Tivoli (56533 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 2020-10-16
13:05:21		 42.8627 12.7002 10 2020-10-16
13:30:18		 Sala Sismica INGV-Roma 83822831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-16 13:05:21 ± 0.1
Latitude 42.8627 ± 0.0063
Longitude 12.7002 ± 0.0098
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83822831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 730
Semi-minor axis of confidence ellipse (meter) 646
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.36153
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 83822831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-16 13:30:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.CANO.HHZ. 2020-10-16T13:07:12.47 3.0 undecidable manual Sg 26.74 0
IV.MMN.HHZ. 2020-10-16T13:07:09.72 3.0 undecidable manual Sg 10.59 0
IV.SARZ.HHZ. 2020-10-16T13:07:05.51 3.0 undecidable manual Sg 20.6 0
IV.BRMO.HHZ. 2020-10-16T13:07:02.49 3.0 undecidable manual Sn -1.11 0
IV.BRES.EHZ. 2020-10-16T13:06:56.86 3.0 undecidable manual Sn -6.83 0
IV.ESLN.HHZ. 2020-10-16T13:06:47.02 3.0 undecidable manual Pg 12.93 0
IV.PLLN.EHZ. 2020-10-16T13:06:29.06 3.0 positive manual Pn 1.81 0
IV.GMB.BHZ. 2020-10-16T13:06:26.80 3.0 undecidable manual Pn -5.5 0
IV.SPS2.HHZ. 2020-10-16T13:06:24.96 3.0 positive manual Pn 2.02 0
IT.DANT.HNZ. 2020-10-16T13:06:24.51 3.0 undecidable manual Pg 9.6 0
IV.VBKN.HHZ. 2020-10-16T13:06:20.38 3.0 undecidable manual Sn -2.22 0
IT.GLNS.HNZ. 2020-10-16T13:06:16.16 3.0 undecidable manual Sg 1.67 0
IV.PAOL.HHZ. 2020-10-16T13:06:15.58 3.0 undecidable manual Sn -5.19 0
IT.LRNO.HNZ. 2020-10-16T13:06:12.09 3.0 undecidable manual Sn -3.41 0
IT.LRNO.HNZ. 2020-10-16T13:05:52.79 3.0 positive manual Pg 2.92 0
IV.PAOL.HHZ. 2020-10-16T13:05:50.57 3.0 undecidable manual Pn -2.26 0
IV.IMOL.HNZ. 2020-10-16T13:05:45.54 3.0 positive manual Pn 0.3 0
IV.RMP.HHZ. 2020-10-16T13:05:43.64 3.0 undecidable manual Sn -1.41 0
IV.FIR.HHZ. 2020-10-16T13:05:40.70 3.0 undecidable manual Pn 0.98 0
IV.CSP1.EHZ. 2020-10-16T13:05:37.74 3.0 undecidable manual S 0
IV.MC2.EHN. 2020-10-16T13:05:35.74 0.3 undecidable manual S 82 40.1265 50 0.49 67
IV.NRCA.HNE. 2020-10-16T13:05:33.35 0.3 undecidable manual S 95 33.8439 50 -0.22 72
IV.ARVD.HHZ. 2020-10-16T13:05:33.28 3.0 undecidable manual P -1.13 0
IV.CSP1.EHZ. 2020-10-16T13:05:32.99 3.0 undecidable manual P 0
IV.GAVE.HNN. 2020-10-16T13:05:30.51 0.6 undecidable manual S 140 24.6531 112 -0.54 45
IV.CESI.HHZ. 2020-10-16T13:05:30.47 0.6 undecidable manual S 46 22.9548 113 -0.03 51
IV.FDMO.HHZ. 2020-10-16T13:05:29.00 0.6 undecidable manual P 58 36.8298 50 -0.08 49
IV.ASSB.HHZ. 2020-10-16T13:05:29.57 0.6 undecidable manual S 350 20.2686 116 -0.09 50
IV.MC2.EHN. 2020-10-16T13:05:29.51 0.1 undecidable manual P 82 40.1265 50 -0.06 97
IV.T1299.EHZ. 2020-10-16T13:05:29.00 3.0 undecidable manual P 0
IV.NRCA.HNE. 2020-10-16T13:05:28.30 0.1 undecidable manual P 95 33.8439 50 -0.31 94
IV.GAVE.HNN. 2020-10-16T13:05:27.67 0.1 undecidable manual P 140 24.6531 112 0.51 91
IT.GNU.HGZ. 2020-10-16T13:05:27.32 0.6 undecidable manual S 238 12.3765 129 -0.03 51
IV.MOMA.HHZ. 2020-10-16T13:05:27.12 0.6 undecidable manual S 238 12.3765 129 -0.23 49
IV.ASSB.HHZ. 2020-10-16T13:05:26.38 1.0 undecidable manual P 350 20.2686 116 0.03 25
IV.CESI.HHZ. 2020-10-16T13:05:26.88 1.0 undecidable manual P 46 22.9548 113 0.04 25
IT.GNU.HGZ. 2020-10-16T13:05:25.19 0.1 undecidable manual P 238 12.3765 129 0.17 100
IV.MOMA.HHZ. 2020-10-16T13:05:25.01 0.6 undecidable manual P 238 12.3765 129 -0.01 52
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHE. ML:0.9 0.0000945 0.5 AML other m 2020-10-16T13:05:27.90
IV.MOMA.HHN. ML:0.8 0.0000714 0.82 AML other m 2020-10-16T13:05:28.42
IV.ASSB.HHE. ML:0.4 0.000020367495 1.5744 AML other m 2020-10-16T13:05:29.20
IV.ASSB.HHN. ML:0.5 0.00002653253 1.216 AML other m 2020-10-16T13:05:29.85
IV.CESI.HHE. ML:0.5 0.0000214822 2.3232 AML other m 2020-10-16T13:05:31.11
IV.CESI.HHN. ML:0.6 0.000027034369999999998 1.056 AML other m 2020-10-16T13:05:30.64
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