Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 08-11-2021 and time 22:33:30 (Italy) in region 6 km NW Spoleto (PG)

A magnitude ML 1.5 earthquake occured in region: 6 km NW Spoleto (PG), on

  • 08-11-2021 21:33:30 (UTC)
  • 08-11-2021 22:33:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7830, 12.7170 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
Spoleto PG 6 38218 38218
Castel Ritaldi PG 6 3278 41496
Campello sul Clitunno PG 7 2442 43938
Trevi PG 11 8469 52407
Sant'Anatolia di Narco PG 11 564 52971
Vallo di Nera PG 12 364 53335
Scheggino PG 12 461 53796
Giano dell'Umbria PG 13 3846 57642
Montefalco PG 14 5679 63321
Massa Martana PG 16 3770 67091
Cerreto di Spoleto PG 17 1075 68166
Acquasparta TR 17 4778 72944
Ferentillo TR 19 1913 74857
Bevagna PG 19 5081 79938
Gualdo Cattaneo PG 19 6155 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
Bulletin
Rev1000 		ML 1.5 2021-11-08
21:33:30		 42.7828 12.7173 10 2022-03-30
13:04:17		 Bollettino Sismico Italiano INGV 97712511
Reviewed
Rev100 		ML 1.5 2021-11-08
21:33:30		 42.7842 12.7122 11 2021-11-08
21:40:44		 Sala Sismica INGV-Roma 97348291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-08 21:33:30 ± 0.05
Latitude 42.7828 ± 0.0036
Longitude 12.7173 ± 0.0049
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97712511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 453
Semi-minor axis of confidence ellipse (meter) 310
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 231
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
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 21
Number of defining phases 21
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) 0.10972
Epicentral distance of station farthest from the epicenter (degree) 0.47214
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 19
Type of magnitude ML
Reference to an origin 97712511
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-14 10:33:28

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 19
Type of magnitude ML
Reference to an origin 97348291
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-08 21:40:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-11-08T21:33:47.78 0.6 undecidable manual S 49 52.4031 50 0.33 44
IV.LNSS.HHZ. 2021-11-08T21:33:42.29 0.6 undecidable manual S 127 33.0447 50 0 49
IV.ASSB.HHE. 2021-11-08T21:33:41.20 0.6 undecidable manual S 351 29.2485 50 -0.06 49
IV.MGAB.HHZ. 2021-11-08T21:33:40.64 0.3 undecidable manual P 287 51.3153 50 0.39 66
IV.CESI.HHZ. 2021-11-08T21:33:40.85 0.6 undecidable manual S 32 28.9488 50 -0.35 46
IV.CSP1.EHZ. 2021-11-08T21:33:40.45 0.1 undecidable manual P 49 52.4031 50 0.03 95
IV.ARRO.EHE. 2021-11-08T21:33:39.63 0.6 undecidable manual S 170 22.9548 114 0.09 49
IV.CESX.HHZ. 2021-11-08T21:33:38.87 0.3 undecidable manual S 209 22.0668 115 -0.41 69
IV.FDMO.HHZ. 2021-11-08T21:33:38.59 0.1 undecidable manual P 47 41.2254 50 -0.1 95
IV.GAVE.EHZ. 2021-11-08T21:33:37.83 0.6 undecidable manual S 125 17.5713 120 -0.06 50
IV.LNSS.HHZ. 2021-11-08T21:33:37.38 0.1 undecidable manual P 127 33.0447 50 -0.06 97
IT.GNU.HGZ. 2021-11-08T21:33:36.36 0.3 undecidable manual S 281 12.1767 130 0 77
IV.CESI.HHZ. 2021-11-08T21:33:36.71 0.1 undecidable manual P 32 28.9488 50 -0.1 97
IV.ARRO.EHE. 2021-11-08T21:33:36.32 0.3 undecidable manual P 170 22.9548 114 0.46 68
IV.MOMA.HHZ. 2021-11-08T21:33:36.24 0.6 undecidable manual S 281 12.1767 130 -0.12 50
IV.ASSB.HHE. 2021-11-08T21:33:36.83 0.3 undecidable manual P 351 29.2485 50 -0.03 74
IV.CESX.HHZ. 2021-11-08T21:33:35.55 0.1 undecidable manual P 209 22.0668 115 -0.16 97
IT.FOPC.HGN. 2021-11-08T21:33:35.41 0.3 undecidable manual P 357 20.7681 116 -0.06 75
IT.GNU.HGZ. 2021-11-08T21:33:34.15 0.1 undecidable manual P 281 12.1767 130 0.13 100
IV.GAVE.EHZ. 2021-11-08T21:33:34.98 0.1 undecidable manual P 125 17.5713 120 0.07 100
IV.MOMA.HHZ. 2021-11-08T21:33:34.13 0.1 positive manual P 281 12.1767 130 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHE. ML:2.2 0.00188 0.22 AML other m 2021-11-08T21:33:36.73
IV.MOMA.HNE. ML:2.2 0.0017900000000000001 0.22 AML other m 2021-11-08T21:33:36.73
IV.MOMA.HHN. ML:1.7 0.0005786724 1.68 AML other m 2021-11-08T21:33:37.95
IV.MOMA.HNN. ML:1.6 0.0004606912 0.1024 AML other m 2021-11-08T21:33:37.57
IV.CESX.HHE. ML:1.3 0.000129944 0.2048 AML other m 2021-11-08T21:33:40.48
IV.GAVE.EHE. ML:1.5 0.00025440449999999997 0.128 AML other m 2021-11-08T21:33:40.72
IV.CESI.HHN. ML:1.4 0.00013705 0.14 AML other m 2021-11-08T21:33:41.41
IV.GAVE.HNE. ML:1.5 0.00025500889999999996 0.192 AML other m 2021-11-08T21:33:41.71
IV.CESX.HHN. ML:1.4 0.00016451199999999999 0.1664 AML other m 2021-11-08T21:33:41.73
IV.GAVE.EHN. ML:1.5 0.00023893545 0.192 AML other m 2021-11-08T21:33:42.18
IV.CESI.HHE. ML:1.2 0.0000752 0.54 AML other m 2021-11-08T21:33:42.39
IV.LNSS.HHE. ML:1.6 0.00016549999999999998 0.12 AML other m 2021-11-08T21:33:43.79
IV.FDMO.HHE. ML:1.3 0.00007045 1.84 AML other m 2021-11-08T21:33:44.00
IV.LNSS.HHN. ML:1.4 0.0001087564 0.1664 AML other m 2021-11-08T21:33:45.39
IV.FDMO.HHN. ML:1.1 0.000046509098 0.1152 AML other m 2021-11-08T21:33:46.38
IV.LNSS.HNE. ML:1.6 0.00018644865 1.4752 AML other m 2021-11-08T21:33:48.09
IV.LNSS.HNN. ML:1.6 0.00018193875 1.3728 AML other m 2021-11-08T21:33:49.93
IV.MGAB.HHN. ML:1.3 0.00005179703500000001 0.1536 AML other m 2021-11-08T21:33:50.27
IV.MGAB.HHE. ML:1.4 0.0000627 0.18 AML other m 2021-11-08T21:33:50.50
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