Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 19-10-2021 and time 09:22:43 (UTC) in region 9 km E Foligno (PG)

A magnitude ML 1.1 earthquake occured in region: 9 km E Foligno (PG), on

  • 19-10-2021 09:22:43 (UTC)
  • 19-10-2021 11:22:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9600, 12.8180 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
Foligno PG 9 57155 57155
Trevi PG 11 8469 65624
Sellano PG 12 1079 66703
Valtopina PG 12 1398 68101
Spello PG 12 8645 76746
Montefalco PG 15 5679 82425
Monte Cavallo MC 15 145 82570
Campello sul Clitunno PG 16 2442 85012
Serravalle di Chienti MC 17 1070 86082
Nocera Umbra PG 17 5839 91921
Bevagna PG 17 5081 97002
Cerreto di Spoleto PG 18 1075 98077
Castel Ritaldi PG 19 3278 101355
Cannara PG 20 4305 105660

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km E of Foligno (57155 inhabitants)
39 Km E of Perugia (166134 inhabitants)
47 Km NE of Terni (111501 inhabitants)
80 Km W of Teramo (54892 inhabitants)
83 Km NW of L'Aquila (69753 inhabitants)
84 Km NE of Viterbo (67173 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
100 Km S of Fano (60888 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 1.1 2021-10-19
09:22:43		 42.9603 12.8183 10 2022-03-30
13:04:14		 Bollettino Sismico Italiano INGV 97253471
Reviewed
Rev100 		ML 1.1 2021-10-19
09:22:43		 42.9632 12.8268 10 2021-10-19
09:29:51		 Sala Sismica INGV-Roma 96756671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-19 09:22:43 ± 0.05
Latitude 42.9603 ± 0.0027
Longitude 12.8183 ± 0.0037
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 97253471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 294
Semi-minor axis of confidence ellipse (meter) 282
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 20
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) 76
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.07734
Epicentral distance of station farthest from the epicenter (degree) 0.42268
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 97253471
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-04 10:56:45

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 96756671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-19 09:29:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-10-19T09:22:59.28 0.3 undecidable manual S 29 46.9197 50 0.3 69
IV.SNTG.HHZ. 2021-10-19T09:22:55.86 0.3 undecidable manual S 17 34.1436 50 0.29 70
IV.CSP1.EHZ. 2021-10-19T09:22:55.42 0.3 undecidable manual S 65 34.5432 50 -0.26 71
IV.ATCC.EHZ. 2021-10-19T09:22:54.00 0.3 undecidable manual S 330 28.8489 50 -0.15 73
IV.GAVE.EHZ. 2021-10-19T09:22:54.43 0.3 undecidable manual S 168 30.3474 50 -0.14 73
IV.NRCA.HHZ. 2021-10-19T09:22:53.64 0.3 undecidable manual S 120 27.8499 50 -0.25 72
IV.MOMA.HHZ. 2021-10-19T09:22:53.60 0.3 undecidable manual S 229 26.6511 50 0.04 75
IV.EL6.EHZ. 2021-10-19T09:22:52.45 0.3 undecidable manual P 29 46.9197 50 -0.11 71
IV.CESX.HHE. 2021-10-19T09:22:52.17 0.3 undecidable manual P 206 43.3233 50 0.16 71
IV.FDMO.HHZ. 2021-10-19T09:22:52.32 0.3 undecidable manual S 69 23.3544 114 -0.34 71
IV.FEMA.HNE. 2021-10-19T09:22:51.34 0.6 undecidable manual S 89 18.7701 118 0.12 50
IT.MTCL.HGZ. 2021-10-19T09:22:50.05 0.3 undecidable manual S 76 15.1737 124 -0.09 76
IV.MC2.EHZ. 2021-10-19T09:22:50.48 0.1 undecidable manual P 100 30.5472 50 0.43 91
IV.SNTG.HHZ. 2021-10-19T09:22:50.42 0.3 undecidable manual P 17 34.1436 50 -0.17 72
IV.ASSB.HHZ. 2021-10-19T09:22:50.08 0.3 undecidable manual S 305 15.873 123 -0.26 73
IV.CSP1.EHZ. 2021-10-19T09:22:50.65 0.3 undecidable manual P 65 34.5432 50 -0.01 74
IV.ATCC.EHZ. 2021-10-19T09:22:49.70 0.3 undecidable manual P 330 28.8489 50 -0.08 74
IV.GAVE.EHZ. 2021-10-19T09:22:49.96 0.3 undecidable manual P 168 30.3474 50 -0.05 74
IV.NRCA.HHZ. 2021-10-19T09:22:49.44 0.3 undecidable manual P 120 27.8499 50 -0.19 73
IV.MOMA.HHZ. 2021-10-19T09:22:49.54 0.3 undecidable manual P 229 26.6511 50 0.1 74
IV.FDMO.HHZ. 2021-10-19T09:22:48.83 0.3 undecidable manual P 69 23.3544 114 -0.09 75
IV.FEMA.HNE. 2021-10-19T09:22:48.24 0.1 undecidable manual P 89 18.7701 118 0.16 99
IV.CESI.HHZ. 2021-10-19T09:22:48.44 0.3 undecidable manual S 55 8.5803 140 0.02 78
IV.ASSB.HHZ. 2021-10-19T09:22:47.64 0.3 undecidable manual P 305 15.873 123 0.06 76
IT.MTCL.HGZ. 2021-10-19T09:22:47.60 0.1 undecidable manual P 76 15.1737 124 0.14 100
IV.CESI.HHZ. 2021-10-19T09:22:46.68 0.3 undecidable manual P 55 8.5803 140 0.21 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.4 0.0003275 1.4 AML other m 2021-10-19T09:22:48.72
IV.CESI.HHE. ML:1.3 0.0002785 0.16 AML other m 2021-10-19T09:22:48.76
IV.ASSB.HHE. ML:1.2 0.000152 0.2 AML other m 2021-10-19T09:22:50.57
IV.ASSB.HHN. ML:1.2 0.000136 0.36 AML other m 2021-10-19T09:22:50.59
IV.FDMO.HHE. ML:0.8 0.00003545 0.56 AML other m 2021-10-19T09:22:52.69
IV.FDMO.HHN. ML:0.9 0.00004865 0.56 AML other m 2021-10-19T09:22:53.13
IV.NRCA.HHN. ML:1.1 0.00006965 0.14 AML other m 2021-10-19T09:22:53.86
IV.MOMA.HHE. ML:0.9 0.00004745 0.14 AML other m 2021-10-19T09:22:54.68
IV.GAVE.EHE. ML:1.3 0.0000968 0.5 AML other m 2021-10-19T09:22:54.65
IV.NRCA.HHE. ML:0.9 0.0000405 1.22 AML other m 2021-10-19T09:22:55.00
IV.MOMA.HHN. ML:0.8 0.000034500000000000005 0.64 AML other m 2021-10-19T09:22:55.23
IV.GAVE.EHN. ML:1.1 0.00006515 0.18 AML other m 2021-10-19T09:22:55.42
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