Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 16-09-2020 and time 01:23:22 (Italy) in region 5 km NW Sellano (PG)

A magnitude ML 1.2 earthquake occured in region: 5 km NW Sellano (PG), on

  • 15-09-2020 23:23:22 (UTC)
  • 16-09-2020 01:23:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9170, 12.8730 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Sellano PG 5 1079 1079
Trevi PG 11 8469 9548
Cerreto di Spoleto PG 11 1075 10623
Campello sul Clitunno PG 13 2442 13065
Monte Cavallo MC 14 145 13210
Preci PG 14 724 13934
Foligno PG 14 57155 71089
Vallo di Nera PG 16 364 71453
Visso MC 18 1107 72560
Montefalco PG 18 5679 78239
Spello PG 18 8645 86884
Serravalle di Chienti MC 19 1070 87954
Valtopina PG 19 1398 89352
Castel Ritaldi PG 19 3278 92630

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km E of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
45 Km E of Perugia (166134 inhabitants)
74 Km W of Teramo (54892 inhabitants)
76 Km NW of L'Aquila (69753 inhabitants)
84 Km NE of Viterbo (67173 inhabitants)
94 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 1.2 2020-09-15
23:23:22		 42.9173 12.8727 10 2021-02-26
14:55:59		 Bollettino Sismico Italiano INGV 83776481
Reviewed
Rev100 		ML 1.2 2020-09-15
23:23:23		 42.9082 12.8632 9 2020-09-15
23:28:11		 Sala Sismica INGV-Roma 82938111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-15 23:23:22 ± 0.03
Latitude 42.9173 ± 0.0018
Longitude 12.8727 ± 0.0025
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83776481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 201
Semi-minor axis of confidence ellipse (meter) 200
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 31
Circular confidence region, given by single value of horizontal uncertainty (meter) 200.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 66
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.09083
Epicentral distance of station farthest from the epicenter (degree) 0.58276
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 82938111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-15 23:28:11

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 83776481
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-14 13:02:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESX.HHZ. 2020-09-15T23:23:36.68 0.6 undecidable manual S 214 41.4252 50 0.09 47
IV.LNSS.HNZ. 2020-09-15T23:23:35.48 0.3 undecidable manual S 159 37.4292 50 -0.05 72
IV.MMO1.EHZ. 2020-09-15T23:23:35.25 0.3 undecidable manual S 93 36.9297 50 -0.14 71
IV.SNTG.HHZ. 2020-09-15T23:23:35.60 0.3 undecidable manual S 8 37.8288 50 -0.03 73
IV.ATCC.EHZ. 2020-09-15T23:23:34.61 0.6 undecidable manual S 328 35.1426 50 -0.31 46
IV.ARVD.HHZ. 2020-09-15T23:23:34.31 0.6 undecidable manual P 5 64.6908 50 -0.07 46
IV.MOMA.HHZ. 2020-09-15T23:23:32.97 0.3 undecidable manual S 243 27.6501 50 0.06 73
IV.MURB.HHZ. 2020-09-15T23:23:32.03 0.3 undecidable manual P 324 47.619 50 0.28 68
IV.GAVE.EHZ. 2020-09-15T23:23:32.03 0.3 undecidable manual S 176 25.0527 50 -0.18 72
IV.MF5.EHZ. 2020-09-15T23:23:32.14 0.3 undecidable manual P 80 48.3183 50 0.28 68
IV.MC2.EHZ. 2020-09-15T23:23:32.53 0.3 undecidable manual S 91 25.752 50 0.14 72
IV.EL6.EHZ. 2020-09-15T23:23:31.96 0.3 undecidable manual P 22 49.3173 50 -0.06 71
IV.ASSB.HHZ. 2020-09-15T23:23:31.14 0.3 undecidable manual S 309 22.2555 115 -0.27 71
IV.MML1.HNZ. 2020-09-15T23:23:31.59 0.3 undecidable manual S 20 23.1546 114 -0.12 73
IV.FDMO.HHZ. 2020-09-15T23:23:31.04 0.3 undecidable manual S 53 21.867 115 -0.26 71
IV.CESX.HHZ. 2020-09-15T23:23:30.65 0.3 undecidable manual P 214 41.4252 50 -0.16 70
IV.SNTG.HHZ. 2020-09-15T23:23:30.15 0.3 undecidable manual P 8 37.8288 50 -0.1 71
IV.ARRO.EHZ. 2020-09-15T23:23:30.40 0.3 undecidable manual P 193 38.5281 50 0.04 72
IV.LNSS.HNZ. 2020-09-15T23:23:30.17 0.3 undecidable manual P 159 37.4292 50 -0.02 73
IV.MMO1.EHZ. 2020-09-15T23:23:30.08 0.1 undecidable manual P 93 36.9297 50 -0.04 97
IV.NRCA.HNZ. 2020-09-15T23:23:30.94 0.3 undecidable manual S 115 21.7671 115 -0.32 70
IV.ATCC.EHZ. 2020-09-15T23:23:29.87 0.3 undecidable manual P 328 35.1426 50 0.03 73
IV.FEMA.HNZ. 2020-09-15T23:23:29.42 0.3 undecidable manual S 71 15.1737 124 0.13 74
IV.GAVE.EHZ. 2020-09-15T23:23:28.34 0.1 undecidable manual P 176 25.0527 50 0.06 98
IV.MC2.EHZ. 2020-09-15T23:23:28.52 0.3 undecidable manual P 91 25.752 50 0.14 72
IV.MOMA.HHZ. 2020-09-15T23:23:28.68 0.1 undecidable manual P 243 27.6501 50 0 99
IT.MTCL.HGZ. 2020-09-15T23:23:28.64 0.3 undecidable manual S 50 13.3755 128 -0.12 74
IV.FDMO.HHZ. 2020-09-15T23:23:27.75 0.1 undecidable manual P 53 21.867 115 0 100
IV.NRCA.HNZ. 2020-09-15T23:23:27.69 0.3 undecidable manual P 115 21.7671 115 -0.04 74
IV.CESI.HHZ. 2020-09-15T23:23:27.96 0.3 undecidable manual S 15 10.0788 136 0.05 76
IV.ASSB.HHZ. 2020-09-15T23:23:27.89 0.3 undecidable manual P 309 22.2555 115 0.07 74
IV.MML1.HNZ. 2020-09-15T23:23:27.97 0.1 undecidable manual P 20 23.1546 114 -0.02 99
IT.MTCL.HGZ. 2020-09-15T23:23:26.43 0.3 undecidable manual P 50 13.3755 128 0.14 74
IV.FEMA.HNZ. 2020-09-15T23:23:26.87 0.3 undecidable manual P 71 15.1737 124 0.28 72
IV.CESI.HHZ. 2020-09-15T23:23:26.07 0.1 positive manual P 15 10.0788 136 0.28 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:1.4 0.00028599999999999996 0.32 AML other m 2020-09-15T23:23:28.33
IV.CESI.HHN. ML:1.3 0.00022749999999999997 0.16 AML other m 2020-09-15T23:23:28.53
IV.ARRO.EHN. ML:0.9 0.0000288 0.22 AML other m 2020-09-15T23:23:30.78
IV.GAVE.EHN. ML:1.4 0.0001339 0.66 AML other m 2020-09-15T23:23:32.76
IV.GAVE.EHE. ML:1.4 0.0001475 1.16 AML other m 2020-09-15T23:23:32.91
IV.MOMA.HHE. ML:0.8 0.000033350000000000004 0.1 AML other m 2020-09-15T23:23:34.78
IV.MOMA.HHN. ML:0.8 0.0000308 1.06 AML other m 2020-09-15T23:23:35.61
IV.ATCC.EHE. ML:1.1 0.0000485 0.2 AML other m 2020-09-15T23:23:35.63
IV.ATCC.EHN. ML:1.2 0.000058099999999999996 0.96 AML other m 2020-09-15T23:23:36.49
IV.SNTG.HHN. ML:1.2 0.0000645 0.14 AML other m 2020-09-15T23:23:36.65
IV.ARRO.EHE. ML:0.8 0.000026000000000000002 0.28 AML other m 2020-09-15T23:23:36.75
IV.SNTG.HHE. ML:1.2 0.000059449999999999995 0.12 AML other m 2020-09-15T23:23:36.70
IV.CESX.HHN. ML:0.9 0.00002665 0.56 AML other m 2020-09-15T23:23:38.16
IV.CESX.HHE. ML:0.9 0.0000249 0.52 AML other m 2020-09-15T23:23:38.43
IV.EL6.EHE. ML:1.5 0.0000899 1.84 AML other m 2020-09-15T23:23:40.06
IV.EL6.EHN. ML:1.4 0.0000731 0.72 AML other m 2020-09-15T23:23:40.50
IV.MURB.HHE. ML:1.3 0.00006145 0.58 AML other m 2020-09-15T23:23:40.48
IV.MURB.HHN. ML:1.4 0.00006594999999999999 0.18 AML other m 2020-09-15T23:23:40.72
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