Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 27-09-2022 and time 19:22:38 (UTC) in region 7 km W Spoleto (PG)

A magnitude ML 1.7 earthquake occured in region: 7 km W Spoleto (PG), on

  • 27-09-2022 19:22:38 (UTC)
  • 27-09-2022 21:22:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7570, 12.6630 at 8 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 7 38218 38218
Castel Ritaldi PG 8 3278 41496
Giano dell'Umbria PG 11 3846 45342
Massa Martana PG 12 3770 49112
Campello sul Clitunno PG 12 2442 51554
Acquasparta TR 12 4778 56332
Sant'Anatolia di Narco PG 14 564 56896
Scheggino PG 15 461 57357
Trevi PG 15 8469 65826
Montefalco PG 15 5679 71505
Vallo di Nera PG 16 364 71869
Ferentillo TR 18 1913 73782
San Gemini TR 18 5018 78800
Montecastrilli TR 19 5022 83822
Gualdo Cattaneo PG 19 6155 89977
Montefranco TR 20 1276 91253

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km N of Terni (111501 inhabitants)
23 Km S of Foligno (57155 inhabitants)
45 Km SE of Perugia (166134 inhabitants)
59 Km NE of Viterbo (67173 inhabitants)
75 Km NW of L'Aquila (69753 inhabitants)
84 Km N of Guidonia Montecelio (88673 inhabitants)
86 Km W of Teramo (54892 inhabitants)
89 Km N of Tivoli (56533 inhabitants)
97 Km N of Roma (2864731 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 1.7 2022-09-27
19:22:38		 42.7567 12.6627 8 2024-03-01
15:27:58		 Bollettino Sismico Italiano INGV 111344431
Reviewed
Rev100 		ML 1.7 2022-09-27
19:22:38		 42.7542 12.6482 9 2022-09-27
19:30:36		 Sala Sismica INGV-Roma 110228361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-09-27 19:22:38 ± 0.05
Latitude 42.7567 ± 0.0027
Longitude 12.6627 ± 0.0037
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 111344431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 295
Semi-minor axis of confidence ellipse (meter) 210
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 244
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 58
Number of defining phases 43
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.73025
Number of stations at which the event was observed 40
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 37
Type of magnitude ML
Reference to an origin 111344431
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-04-20 16:30:03

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 37
Type of magnitude ML
Reference to an origin 110228361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-09-27 19:30:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CR.STON.BHZ. 2022-09-27T19:24:34.94 3.0 undecidable manual Sg 10.72 0
IV.VARE.HHZ. 2022-09-27T19:24:29.26 3.0 undecidable manual Sn -3.73 0
ST.CARE.HNZ. 2022-09-27T19:24:19.66 3.0 undecidable manual Sn -6.69 0
AC.VLO.HHZ. 2022-09-27T19:24:15.78 3.0 positive manual Pg 10.44 0
IV.MRGE.HHZ. 2022-09-27T19:24:11.51 3.0 negative manual Pg 16.280001 0
MN.TRI.HHZ. 2022-09-27T19:24:11.02 3.0 undecidable manual Sg 5.85 0
IV.MPNC.HHZ. 2022-09-27T19:24:09.96 3.0 undecidable manual Pg 11.68 0
IV.MCRV.HHZ. 2022-09-27T19:24:00.00 3.0 undecidable manual Sn -2.31 0
CH.DIX.HHZ. 2022-09-27T19:23:54.05 3.0 undecidable manual Pn -1.01 0
IV.SACR.HHZ. 2022-09-27T19:23:48.69 3.0 undecidable manual Sg 3.19 0
IV.PTRJ.HHZ. 2022-09-27T19:23:46.87 3.0 undecidable manual Sg 3.02 0
SI.MOSI.HHZ. 2022-09-27T19:23:45.59 3.0 undecidable manual Pg 2.97 0
OX.MPRI.HHZ. 2022-09-27T19:23:40.92 3.0 negative manual Pg 7.27 0
IV.SNAL.HHZ. 2022-09-27T19:23:29.83 3.0 undecidable manual Pg 4.83 0
IV.MRB1.HHZ. 2022-09-27T19:23:20.30 3.0 undecidable manual Pn -1.01 0
IV.FOSV.EHZ. 2022-09-27T19:22:58.08 0.6 undecidable manual S 8 60.1953 50 0.53 41
IV.CSP1.EHZ. 2022-09-27T19:22:57.22 0.6 undecidable manual S 50 57.5979 50 0.36 43
IV.SMA1.EHZ. 2022-09-27T19:22:57.06 0.6 undecidable manual S 104 56.5989 50 0.48 42
IV.MURB.HHZ. 2022-09-27T19:22:57.36 0.6 undecidable manual S 349 57.2982 50 0.6 40
IV.MMO1.EHZ. 2022-09-27T19:22:56.65 0.6 undecidable manual S 73 56.2992 50 0.14 45
IV.MML1.EHZ. 2022-09-27T19:22:54.06 0.3 undecidable manual S 32 46.8198 50 0.08 70
IV.MGAB.HHZ. 2022-09-27T19:22:54.45 0.6 undecidable manual S 291 48.0186 50 0.16 46
IV.MC2.EHZ. 2022-09-27T19:22:54.18 0.3 undecidable manual S 68 46.1205 50 0.39 66
IV.FDMO.HHZ. 2022-09-27T19:22:53.79 0.6 undecidable manual S 48 46.4202 50 -0.07 47
IV.CING.HHZ. 2022-09-27T19:22:52.90 0.3 undecidable manual P 32 81.0522 50 0.25 64
IV.EL6.EHZ. 2022-09-27T19:22:51.37 0.3 undecidable manual P 29 72.7716 50 -0.01 68
IV.SSFR.HHZ. 2022-09-27T19:22:51.64 0.6 undecidable manual P 7 75.9684 50 -0.23 43
IT.MTCL.HGZ. 2022-09-27T19:22:51.60 0.6 undecidable manual S 46 37.9287 50 -0.01 48
IV.CESI.HHZ. 2022-09-27T19:22:50.32 0.3 undecidable manual S 35 33.8439 103 -0.1 72
IV.ATMI.HHZ. 2022-09-27T19:22:50.97 0.3 undecidable manual P 334 71.5728 50 -0.22 65
IV.LNSS.HHZ. 2022-09-27T19:22:50.47 0.6 undecidable manual S 119 35.2425 50 -0.41 45
IV.CSP1.EHZ. 2022-09-27T19:22:49.00 0.3 undecidable manual P 50 57.5979 50 -0.04 69
IV.ASSB.HHZ. 2022-09-27T19:22:49.45 0.3 undecidable manual S 359 31.746 104 -0.25 70
IV.SMA1.EHZ. 2022-09-27T19:22:49.00 0.3 undecidable manual P 104 56.5989 50 0.12 68
IV.FOSV.EHZ. 2022-09-27T19:22:49.23 0.3 undecidable manual P 8 60.1953 50 -0.21 67
IV.MURB.HHZ. 2022-09-27T19:22:49.10 0.1 undecidable manual P 349 57.2982 50 0.12 91
IV.MMO1.EHZ. 2022-09-27T19:22:48.65 0.1 undecidable manual P 73 56.2992 50 -0.18 90
IV.RM33.EHZ. 2022-09-27T19:22:48.09 0.3 undecidable manual P 121 52.8027 50 -0.19 68
IV.MGAB.HHZ. 2022-09-27T19:22:47.61 0.3 undecidable manual P 291 48.0186 50 0.06 70
IT.FOPC.HGZ. 2022-09-27T19:22:47.58 0.3 undecidable manual S 8 23.8539 109 0.49 67
IV.MML1.EHZ. 2022-09-27T19:22:47.15 0.1 undecidable manual P 32 46.8198 50 -0.23 91
IV.ATCC.EHZ. 2022-09-27T19:22:47.32 0.3 undecidable manual P 358 47.5191 50 -0.17 69
IV.MC2.EHZ. 2022-09-27T19:22:47.25 0.1 undecidable manual P 68 46.1205 50 -0.01 95
IV.FDMO.HHZ. 2022-09-27T19:22:47.15 0.1 undecidable manual P 48 46.4202 50 -0.16 92
IV.ARRO.EHZ. 2022-09-27T19:22:46.70 0.6 undecidable manual S 157 21.3675 111 0.41 46
IV.GAVE.EHZ. 2022-09-27T19:22:45.92 0.3 undecidable manual S 111 20.1687 112 0.03 74
IV.NRCA.HHZ. 2022-09-27T19:22:45.77 0.1 undecidable manual P 77 37.7289 50 -0.2 93
IV.CESI.HHZ. 2022-09-27T19:22:45.12 0.1 undecidable manual P 35 33.8439 103 -0.2 93
IV.LNSS.HHZ. 2022-09-27T19:22:45.29 0.1 undecidable manual P 119 35.2425 50 -0.29 91
IT.MTCL.HGZ. 2022-09-27T19:22:45.84 0.3 undecidable manual P 46 37.9287 50 -0.16 70
IV.CESX.HHZ. 2022-09-27T19:22:45.12 0.6 undecidable manual S 201 17.5713 115 0.06 50
IV.ASSB.HHZ. 2022-09-27T19:22:44.72 0.1 undecidable manual P 359 31.746 104 -0.19 94
IT.FOPC.HGZ. 2022-09-27T19:22:43.59 0.3 undecidable manual P 8 23.8539 109 0.2 71
IV.ARRO.EHZ. 2022-09-27T19:22:43.13 0.1 undecidable manual P 157 21.3675 111 0.2 96
IV.CESX.HHZ. 2022-09-27T19:22:42.22 0.1 undecidable manual P 201 17.5713 115 -0.01 100
IT.GNU.HGZ. 2022-09-27T19:22:42.41 0.6 undecidable manual S 305 9.1797 131 -0.18 49
IV.GAVE.EHZ. 2022-09-27T19:22:42.79 0.1 undecidable manual P 111 20.1687 112 0.08 98
IT.GNU.HGZ. 2022-09-27T19:22:40.94 0.1 undecidable manual P 305 9.1797 131 0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:2.1 0.001058 0.4 AML other m 2022-09-27T19:22:46.48
IV.CESX.HHE. ML:2.0 0.000885 1 AML other m 2022-09-27T19:22:46.41
IV.GAVE.EHE. ML:1.6 0.0003045 0.12 AML other m 2022-09-27T19:22:47.87
IV.GAVE.HNE. ML:1.6 0.0003073243 0.1536 AML other m 2022-09-27T19:22:49.23
IV.ASSB.HHN. ML:1.6 0.00016949999999999997 0.52 AML other m 2022-09-27T19:22:50.00
IV.GAVE.EHN. ML:1.7 0.0004075 0.4 AML other m 2022-09-27T19:22:50.46
IV.ARRO.EHE. ML:1.5 0.00020850000000000003 1.2 AML other m 2022-09-27T19:22:50.65
IV.ASSB.HHE. ML:1.5 0.0001625 0.24 AML other m 2022-09-27T19:22:51.24
IV.ARRO.EHN. ML:1.4 0.000185 1.22 AML other m 2022-09-27T19:22:51.87
IV.CESI.HNN. ML:1.7 0.00019998270000000002 0.2688 AML other m 2022-09-27T19:22:52.19
IV.LNSS.HHN. ML:1.7 0.0002245 0.84 AML other m 2022-09-27T19:22:52.84
IV.CESI.HHN. ML:1.7 0.00020649999999999998 0.38 AML other m 2022-09-27T19:22:52.45
IV.CESI.HHE. ML:1.5 0.0001395 0.54 AML other m 2022-09-27T19:22:52.41
IV.LNSS.HHE. ML:1.7 0.0002165 1.3 AML other m 2022-09-27T19:22:52.31
IV.NRCA.HHN. ML:1.9 0.0003105 0.12 AML other m 2022-09-27T19:22:53.16
IV.FDMO.HHN. ML:1.5 0.00010070000000000001 1.16 AML other m 2022-09-27T19:22:54.22
IV.NRCA.HHE. ML:1.7 0.0001905 1.02 AML other m 2022-09-27T19:22:55.08
IV.FDMO.HHE. ML:1.7 0.00013450000000000002 0.2 AML other m 2022-09-27T19:22:55.66
IV.ATCC.EHN. ML:1.5 0.000089485165 0.2944 AML other m 2022-09-27T19:22:55.85
IV.MML1.EHN. ML:1.4 0.00006774955 0.2432 AML other m 2022-09-27T19:22:56.24
IV.MML1.EHE. ML:1.4 0.00006839004 0.1792 AML other m 2022-09-27T19:22:57.24
IV.MMO1.EHN. ML:1.8 0.00014500000000000003 0.3 AML other m 2022-09-27T19:22:58.26
IV.MMO1.EHE. ML:1.7 0.0001198 0.6 AML other m 2022-09-27T19:22:58.56
IV.RM33.EHE. ML:1.6 0.00009685000000000001 0.6 AML other m 2022-09-27T19:22:58.03
IV.SMA1.EHN. ML:1.7 0.000114 1.18 AML other m 2022-09-27T19:22:59.66
IV.MURB.HHN. ML:2.0 0.00020700000000000002 0.24 AML other m 2022-09-27T19:22:59.42
IV.MGAB.HHE. ML:1.6 0.000099845045 1.5136 AML other m 2022-09-27T19:23:01.01
IV.MURB.HHE. ML:2.2 0.0003705 0.32 AML other m 2022-09-27T19:23:01.22
IV.MURB.HNE. ML:2.2 0.0003356077 0.32 AML other m 2022-09-27T19:23:01.23
IV.MGAB.HHN. ML:1.5 0.000081444465 1.6672 AML other m 2022-09-27T19:23:01.91
IV.SMA1.EHE. ML:1.8 0.0001265 0.42 AML other m 2022-09-27T19:23:01.84
IV.SSFR.HHE. ML:1.8 0.00009434999999999999 0.22 AML other m 2022-09-27T19:23:03.82
IV.MURB.HNN. ML:1.9 0.00016305054999999998 1.6544 AML other m 2022-09-27T19:23:04.02
IV.RM33.EHN. ML:1.5 0.00007185 0.42 AML other m 2022-09-27T19:23:04.25
IV.ATMI.HHN. ML:2.1 0.000209 0.5 AML other m 2022-09-27T19:23:05.62
IV.ATMI.HHE. ML:2.2 0.000252 0.42 AML other m 2022-09-27T19:23:07.34
IV.SSFR.HHN. ML:1.7 0.0000775 0.44 AML other m 2022-09-27T19:23:09.94
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