Earthquake with magnitude of ML 1.1 on date 27-10-2021 and time 05:07:22 (Italy) in region 4 km E Sellano (PG)

A magnitude ML 1.1 earthquake occured in region: 4 km E Sellano (PG), on

  • 27-10-2021 03:07:22 (UTC)
  • 27-10-2021 05:07:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8970, 12.9750 at 11 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
Sellano PG 4 1079 1079
Preci PG 6 724 1803
Cerreto di Spoleto PG 10 1075 2878
Visso MC 10 1107 3985
Monte Cavallo MC 11 145 4130
Ussita MC 14 444 4574
Castelsantangelo sul Nera MC 15 281 4855
Norcia PG 15 4957 9812
Vallo di Nera PG 17 364 10176
Pieve Torina MC 18 1458 11634
Campello sul Clitunno PG 18 2442 14076
Fiordimonte MC 18 202 14278
Trevi PG 19 8469 22747
Serravalle di Chienti MC 20 1070 23817
Cascia PG 20 3217 27034

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
53 Km E of Perugia (166134 inhabitants)
65 Km W of Teramo (54892 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
89 Km NE of Viterbo (67173 inhabitants)
92 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
Reviewed
Rev100
ML 1.1 2021-10-27
03:07:22
42.8967 12.975 11 2021-10-27
03:11:08
Sala Sismica INGV-Roma 97011551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-27 03:07:22 ± 0.04
Latitude 42.8967 ± 0.0018
Longitude 12.9750 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97011551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 290
Semi-minor axis of confidence ellipse (meter) 163
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 267
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.29768
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 97011551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-27 03:11:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMUR.HNZ. 2021-10-27T03:07:42.97 3.0 undecidable manual S 0.42 0
IV.MMO1.EHZ. 2021-10-27T03:07:32.74 0.1 undecidable manual S 89 28.5492 50 0.17 94
IV.CSP1.EHZ. 2021-10-27T03:07:32.46 0.1 undecidable manual S 41 28.5492 50 -0.1 95
IV.GAVE.EHZ. 2021-10-27T03:07:31.14 0.1 undecidable manual S 196 23.6541 50 -0.1 96
IV.MML1.EHZ. 2021-10-27T03:07:31.36 0.1 undecidable manual S 359 24.0537 50 0.01 98
IV.FDMO.HHZ. 2021-10-27T03:07:29.47 0.1 undecidable manual S 30 17.9709 121 -0.17 96
IV.CESI.HHZ. 2021-10-27T03:07:28.30 0.1 undecidable manual S 335 13.2756 129 0 100
IV.MMO1.EHZ. 2021-10-27T03:07:28.20 1.0 undecidable manual P 89 28.5492 50 -0.06 24
IV.CSP1.EHZ. 2021-10-27T03:07:28.33 0.6 positive manual P 41 28.5492 50 0.07 48
IV.NRCA.HHZ. 2021-10-27T03:07:28.27 0.1 undecidable manual S 122 13.2756 129 -0.04 99
IV.LNSS.HHZ. 2021-10-27T03:07:28.85 0.6 negative manual P 171 33.0447 50 -0.1 47
IV.MML1.EHZ. 2021-10-27T03:07:27.67 1.0 negative manual P 359 24.0537 50 0.11 24
IV.GAVE.EHZ. 2021-10-27T03:07:27.47 0.3 positive manual P 196 23.6541 50 -0.03 73
IV.NRCA.HHZ. 2021-10-27T03:07:26.00 0.6 undecidable manual P 122 13.2756 129 0.2 48
IV.CESI.HHZ. 2021-10-27T03:07:26.04 0.3 undecidable manual P 335 13.2756 129 0.24 71
IV.FDMO.HHZ. 2021-10-27T03:07:26.47 1.0 positive manual P 30 17.9709 121 -0.11 24
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.2 0.00016599999999999997 0.18 AML other m 2021-10-27T03:07:28.38
IV.CESI.HHN. ML:1.2 0.0001445 0.32 AML other m 2021-10-27T03:07:28.57
IV.NRCA.HHE. ML:1.2 0.00014700000000000002 0.18 AML other m 2021-10-27T03:07:28.52
IV.CESI.HHE. ML:0.8 0.0000665 0.4 AML other m 2021-10-27T03:07:28.72
IV.FDMO.HHE. ML:1.3 0.000147 0.16 AML other m 2021-10-27T03:07:29.74
IV.FDMO.HHN. ML:0.9 0.0000696 0.2 AML other m 2021-10-27T03:07:29.84
IV.MML1.EHN. ML:0.9 0.000051699999999999996 0.16 AML other m 2021-10-27T03:07:31.68
IV.MML1.EHE. ML:1.1 0.0000741 0.18 AML other m 2021-10-27T03:07:31.69
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