Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 07-11-2021 and time 23:16:52 (Italy) in region 6 km SE Castel Ritaldi (PG)

A magnitude ML 1.0 earthquake occured in region: 6 km SE Castel Ritaldi (PG), on

  • 07-11-2021 22:16:52 (UTC)
  • 07-11-2021 23:16:52 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7830, 12.7110 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
Castel Ritaldi PG 6 3278 3278
Spoleto PG 6 38218 41496
Campello sul Clitunno PG 7 2442 43938
Trevi PG 11 8469 52407
Sant'Anatolia di Narco PG 12 564 52971
Giano dell'Umbria PG 12 3846 56817
Scheggino PG 13 461 57278
Vallo di Nera PG 13 364 57642
Montefalco PG 13 5679 63321
Massa Martana PG 15 3770 67091
Acquasparta TR 17 4778 71869
Cerreto di Spoleto PG 17 1075 72944
Bevagna PG 19 5081 78025
Gualdo Cattaneo PG 19 6155 84180
Ferentillo TR 19 1913 86093
Foligno PG 19 57155 143248
Poggiodomo PG 20 117 143365

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km S of Foligno (57155 inhabitants)
25 Km N of Terni (111501 inhabitants)
45 Km SE of Perugia (166134 inhabitants)
64 Km NE of Viterbo (67173 inhabitants)
74 Km NW of L'Aquila (69753 inhabitants)
82 Km W of Teramo (54892 inhabitants)
87 Km N of Guidonia Montecelio (88673 inhabitants)
91 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 1.0 2021-11-07
22:16:52		 42.7827 12.7107 10 2021-11-07
22:23:46		 Sala Sismica INGV-Roma 97325921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-07 22:16:52 ± 0.07
Latitude 42.7827 ± 0.0054
Longitude 12.7107 ± 0.0074
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 97325921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 728
Semi-minor axis of confidence ellipse (meter) 468
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 226
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) 82
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.47574
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 97325921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-07 22:23:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TREG.EHZ. 2021-11-07T22:18:13.94 3.0 undecidable manual Sn 1.83 0
AC.VLO.HHZ. 2021-11-07T22:18:11.87 3.0 undecidable manual Pg 12.02 0
IV.MILZ.HHZ. 2021-11-07T22:18:02.00 3.0 negative manual Pg 10.57 0
IV.SELL.HHZ. 2021-11-07T22:17:59.54 3.0 negative manual Pg 9.96 0
IV.SCIAC.HHZ. 2021-11-07T22:17:53.84 3.0 undecidable manual Pn -4.2 0
IX.STN3.HNZ.01 2021-11-07T22:17:42.99 3.0 undecidable manual Sn -9.99 0
IV.VENL.EHZ. 2021-11-07T22:17:40.30 3.0 undecidable manual Pg 11.78 0
MN.TRI.HHZ. 2021-11-07T22:17:30.54 3.0 negative manual Pn -1.53 0
IX.SRN3.HHZ.02 2021-11-07T22:17:24.58 3.0 positive manual Pg -1.05 0
IV.ARVD.HHZ. 2021-11-07T22:17:14.95 3.0 undecidable manual S 0.05 0
IV.CSP1.EHZ. 2021-11-07T22:17:10.15 1.0 undecidable manual S 49 52.8027 50 0.73 19
IV.MMO1.EHZ. 2021-11-07T22:17:09.99 0.6 undecidable manual S 75 51.7038 50 0.85 37
IV.NRCA.HHZ. 2021-11-07T22:17:04.49 0.6 undecidable manual S 80 33.3444 50 0.27 46
IV.LNSS.HHZ. 2021-11-07T22:17:04.29 0.6 undecidable manual S 126 33.4443 50 0.02 49
IV.MMO1.EHZ. 2021-11-07T22:17:02.23 0.1 undecidable manual P 75 51.7038 50 0.03 94
IV.ASSB.HHZ. 2021-11-07T22:17:02.79 0.6 undecidable manual S 352 29.1486 50 -0.32 46
IV.CSP1.EHZ. 2021-11-07T22:17:02.21 0.1 undecidable manual P 49 52.8027 50 -0.14 92
IV.CESI.HHZ. 2021-11-07T22:17:02.93 0.6 undecidable manual S 33 29.2485 50 -0.21 47
IV.CESX.HHZ. 2021-11-07T22:17:01.00 0.6 undecidable manual S 208 21.7671 115 -0.06 49
IV.FDMO.HHZ. 2021-11-07T22:17:00.54 0.1 undecidable manual P 47 41.625 50 -0.09 95
IV.NRCA.HHZ. 2021-11-07T22:16:59.15 0.1 undecidable manual P 80 33.3444 50 -0.2 94
IV.GAVE.EHZ. 2021-11-07T22:16:59.60 0.6 undecidable manual S 124 17.9709 120 -0.29 47
IV.LNSS.HHZ. 2021-11-07T22:16:59.27 0.1 undecidable manual P 126 33.4443 50 -0.1 96
IV.SAMA.EHZ. 2021-11-07T22:16:58.67 3.0 undecidable manual P -2.63 0
IV.MOMA.HHZ. 2021-11-07T22:16:58.17 0.6 undecidable manual S 282 11.6772 131 0.08 50
IV.ASSB.HHZ. 2021-11-07T22:16:58.82 1.0 positive manual P 352 29.1486 50 0.11 24
IV.CESI.HHZ. 2021-11-07T22:16:58.62 0.6 undecidable manual P 33 29.2485 50 -0.11 48
IV.CESX.HHZ. 2021-11-07T22:16:57.71 1.0 positive manual P 208 21.7671 115 0.19 24
IV.MOMA.HHZ. 2021-11-07T22:16:56.02 0.1 positive manual P 282 11.6772 131 0.21 97
IV.GAVE.EHZ. 2021-11-07T22:16:56.87 0.1 undecidable manual P 124 17.9709 120 0.02 100
IV.LPEL.HHZ. 2021-11-07T22:16:52.59 3.0 undecidable manual P -8.63 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHN. ML:1.0 0.00010455000000000001 0.5 AML other m 2021-11-07T22:16:58.71
IV.MOMA.HNE. ML:1.3 0.00022 0.24 AML other m 2021-11-07T22:16:58.75
IV.MOMA.HHE. ML:1.2 0.000193 0.22 AML other m 2021-11-07T22:16:58.86
IV.MOMA.HNN. ML:1.2 0.000183 0.76 AML other m 2021-11-07T22:17:01.39
IV.GAVE.EHN. ML:0.9 0.0000592 0.44 AML other m 2021-11-07T22:17:01.85
IV.GAVE.EHE. ML:1.0 0.00009054999999999999 1.34 AML other m 2021-11-07T22:17:02.81
IV.ASSB.HHE. ML:1.0 0.00005045 0.22 AML other m 2021-11-07T22:17:03.54
IV.ASSB.HHN. ML:0.8 0.000036150000000000005 0.46 AML other m 2021-11-07T22:17:03.77
IV.NRCA.HHE. ML:1.0 0.00004615 0.12 AML other m 2021-11-07T22:17:04.95
IV.NRCA.HHN. ML:0.8 0.0000313 0.72 AML other m 2021-11-07T22:17:08.25
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