Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 28-09-2021 and time 18:13:06 (Italy) in region 3 km SW Castel Ritaldi (PG)

A magnitude ML 2.3 earthquake occured in region: 3 km SW Castel Ritaldi (PG), on

  • 28-09-2021 16:13:06 (UTC)
  • 28-09-2021 18:13:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8050, 12.6490 at 7 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
Castel Ritaldi PG 3 3278 3278
Giano dell'Umbria PG 7 3846 7124
Montefalco PG 10 5679 12803
Campello sul Clitunno PG 11 2442 15245
Spoleto PG 11 38218 53463
Massa Martana PG 11 3770 57233
Trevi PG 12 8469 65702
Gualdo Cattaneo PG 14 6155 71857
Bevagna PG 15 5081 76938
Acquasparta TR 15 4778 81716
Sant'Anatolia di Narco PG 17 564 82280
Foligno PG 18 57155 139435
Vallo di Nera PG 18 364 139799
Scheggino PG 18 461 140260
Todi PG 20 16851 157111
Collazzone PG 20 3473 160584

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km S of Foligno (57155 inhabitants)
27 Km N of Terni (111501 inhabitants)
40 Km SE of Perugia (166134 inhabitants)
62 Km NE of Viterbo (67173 inhabitants)
79 Km NW of L'Aquila (69753 inhabitants)
88 Km W of Teramo (54892 inhabitants)
90 Km N of Guidonia Montecelio (88673 inhabitants)
94 Km N of Tivoli (56533 inhabitants)
96 Km SE of Arezzo (99543 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 2.3 2021-09-28
16:13:06		 42.8048 12.6492 7 2022-03-30
13:04:09		 Bollettino Sismico Italiano INGV 96282291
Reviewed
Rev100 		ML 2.3 2021-09-28
16:13:06		 42.8042 12.6563 7 2021-09-28
16:21:56		 Sala Sismica INGV-Roma 95999171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-28 16:13:06 ± 0.05
Latitude 42.8048 ± 0.0027
Longitude 12.6492 ± 0.0037
Depth (km) 7 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96282291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 272
Semi-minor axis of confidence ellipse (meter) 231
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 143
Circular confidence region, given by single value of horizontal uncertainty (meter) 270.0
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 67
Number of defining phases 67
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.05756
Epicentral distance of station farthest from the epicenter (degree) 0.95958
Number of stations at which the event was observed 40
Number of stations from which data was used for origin computation 40
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 72
Type of magnitude ML
Reference to an origin 96282291
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-08 16:05:01

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 72
Type of magnitude ML
Reference to an origin 95999171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-28 16:21:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-09-28T16:13:28.92 1.0 undecidable manual S 32 68.7756 50 0.82 18
IV.ATVO.HHZ. 2021-09-28T16:13:28.35 0.6 undecidable manual S 343 66.9774 50 0.73 38
IV.MTRA.EHZ. 2021-09-28T16:13:27.06 0.1 undecidable manual S 95 61.0944 50 1.01 67
IV.SRES.HHZ. 2021-09-28T16:13:27.20 0.1 undecidable manual S 190 63.9915 50 0.37 85
IV.GUMA.HHZ. 2021-09-28T16:13:27.36 0.6 undecidable manual S 63 62.5929 50 0.9 35
IV.RM33.EHZ. 2021-09-28T16:13:25.14 0.1 undecidable manual S 125 56.5989 50 0.29 88
IV.PARC.HHZ. 2021-09-28T16:13:24.32 0.3 undecidable manual P 341 99.3228 50 0.66 55
IV.SNTG.HHZ. 2021-09-28T16:13:24.66 0.6 undecidable manual S 25 55.2003 50 0.17 45
IV.CSP1.EHZ. 2021-09-28T16:13:24.83 1.0 undecidable manual S 55 55.2003 50 0.35 22
IV.MMO1.EHZ. 2021-09-28T16:13:24.84 0.1 undecidable manual S 79 56.0994 50 0.13 91
IV.CRE.HHZ. 2021-09-28T16:13:24.89 0.6 undecidable manual P 328 106.5156 50 0.12 41
IV.MURB.HHZ. 2021-09-28T16:13:23.84 0.1 undecidable manual S 349 51.8037 50 0.27 89
IV.NARO.HHZ. 2021-09-28T16:13:22.14 0.3 undecidable manual P 356 89.5437 50 -0.02 65
IV.MML1.EHZ. 2021-09-28T16:13:21.01 0.1 undecidable manual S 37 43.1235 50 -0.23 91
IV.FDMO.HHZ. 2021-09-28T16:13:21.04 0.1 undecidable manual S 54 43.9227 50 -0.42 88
IV.MGAB.HHZ. 2021-09-28T16:13:21.97 0.1 undecidable manual S 286 45.3213 50 0.14 93
IV.MC2.EHZ. 2021-09-28T16:13:21.85 0.3 undecidable manual S 75 45.4212 50 -0.02 71
IV.PIEI.HHZ. 2021-09-28T16:13:21.00 0.3 undecidable manual P 354 81.5517 50 0.07 66
IV.ATPI.EHZ. 2021-09-28T16:13:20.22 0.3 undecidable manual P 344 74.37 50 0.4 62
IV.CAFI.HHZ. 2021-09-28T16:13:20.44 0.1 undecidable manual P 317 80.2641 50 -0.29 84
IV.ATCC.EHZ. 2021-09-28T16:13:20.92 0.6 undecidable manual S 359 42.2244 50 -0.08 47
IV.CING.HHZ. 2021-09-28T16:13:20.17 0.1 undecidable manual P 35 77.2671 50 -0.09 88
IV.NRCA.HHZ. 2021-09-28T16:13:19.99 0.6 undecidable manual S 85 37.9287 50 0.11 47
IV.SSFR.HHZ. 2021-09-28T16:13:19.20 0.3 undecidable manual P 9 70.8735 50 -0.08 89
IV.FEMA.HNN. 2021-09-28T16:13:19.63 0.6 undecidable manual S 62 36.9297 101 0.09 48
IV.LNSS.HHZ. 2021-09-28T16:13:19.90 0.6 undecidable manual S 125 38.9277 50 -0.24 46
IV.FIAM.HHZ. 2021-09-28T16:13:19.20 0.3 undecidable manual P 147 70.7736 50 -0.06 67
IV.ATMI.HHZ. 2021-09-28T16:13:18.84 0.1 undecidable manual P 332 66.378 50 0.26 87
IV.EL6.EHZ. 2021-09-28T16:13:18.92 0.1 undecidable manual P 32 68.7756 50 -0.04 91
IT.MMP1.HGE. 2021-09-28T16:13:18.17 0.1 undecidable manual P 172 62.1933 50 0.23 88
IV.GUMA.HHZ. 2021-09-28T16:13:18.13 0.1 undecidable manual P 63 62.5929 50 0.12 90
IT.MTCL.HGN. 2021-09-28T16:13:18.89 0.6 undecidable manual S 53 35.3424 102 -0.11 47
IV.ATVO.HHZ. 2021-09-28T16:13:18.81 0.1 undecidable manual P 343 66.9774 50 0.13 89
IV.CESI.HHZ. 2021-09-28T16:13:17.21 0.6 undecidable manual S 43 30.3474 104 -0.11 48
IV.MTRA.EHZ. 2021-09-28T16:13:17.44 0.1 undecidable manual P 95 61.0944 50 -0.33 86
IV.SRES.HHZ. 2021-09-28T16:13:17.79 0.1 undecidable manual P 190 63.9915 50 -0.43 84
IV.SMA1.EHZ. 2021-09-28T16:13:17.46 0.1 undecidable manual P 109 59.1963 50 -0.01 93
IV.MMO1.EHZ. 2021-09-28T16:13:16.52 0.1 undecidable manual P 79 56.0994 50 -0.48 84
IV.MURB.HHZ. 2021-09-28T16:13:16.19 0.1 undecidable manual P 349 51.8037 50 -0.15 91
IV.RM33.EHZ. 2021-09-28T16:13:16.86 0.1 undecidable manual P 125 56.5989 50 -0.22 89
IV.ARRO.EHZ. 2021-09-28T16:13:16.33 0.6 undecidable manual S 159 26.751 105 0.22 47
IV.SNTG.HHZ. 2021-09-28T16:13:16.58 0.1 undecidable manual P 25 55.2003 50 -0.29 88
IV.CSP1.EHZ. 2021-09-28T16:13:16.58 0.1 undecidable manual P 55 55.2003 50 -0.29 88
IV.ASSB.HHZ. 2021-09-28T16:13:16.00 0.6 undecidable manual S 2 26.3514 106 0.02 49
IV.SEF1.HNN. 2021-09-28T16:13:15.84 0.3 undecidable manual P 32 45.0216 50 0.55 63
IV.MC2.EHZ. 2021-09-28T16:13:15.24 0.1 undecidable manual P 75 45.4212 50 -0.12 93
IV.GAVE.EHZ. 2021-09-28T16:13:15.68 0.6 undecidable manual S 122 23.5542 107 0.64 42
IV.CESX.HHZ. 2021-09-28T16:13:14.64 0.6 undecidable manual S 193 22.3554 108 0 50
IV.ATCC.EHZ. 2021-09-28T16:13:14.44 0.1 undecidable manual P 359 42.2244 50 -0.42 88
IV.MML1.EHZ. 2021-09-28T16:13:14.61 0.1 undecidable manual P 37 43.1235 50 -0.39 88
IT.FOPC.HGZ. 2021-09-28T16:13:14.02 0.3 undecidable manual S 13 18.7701 112 0.54 44
IV.FDMO.HHZ. 2021-09-28T16:13:14.80 0.1 undecidable manual P 54 43.9227 50 -0.32 89
IV.LNSS.HHZ. 2021-09-28T16:13:14.07 0.1 undecidable manual P 125 38.9277 50 -0.29 91
IV.MGAB.HHZ. 2021-09-28T16:13:14.95 0.1 undecidable manual P 286 45.3213 50 -0.39 88
IT.MTCL.HGN. 2021-09-28T16:13:13.45 0.1 undecidable manual P 53 35.3424 102 -0.26 92
IV.NRCA.HHZ. 2021-09-28T16:13:13.91 0.1 positive manual P 85 37.9287 50 -0.3 91
IV.FEMA.HNN. 2021-09-28T16:13:13.95 0.1 undecidable manual P 62 36.9297 101 -0.07 95
IV.ASSB.HHZ. 2021-09-28T16:13:12.02 0.1 undecidable manual P 2 26.3514 106 0.06 97
IV.CESI.HHZ. 2021-09-28T16:13:12.71 0.1 positive manual P 43 30.3474 104 -0.03 97
IV.ARRO.EHZ. 2021-09-28T16:13:12.10 0.3 undecidable manual P 159 26.751 105 0.07 73
IV.CESX.HHZ. 2021-09-28T16:13:11.09 0.1 positive manual P 193 22.3554 108 -0.1 97
IV.GAVE.EHZ. 2021-09-28T16:13:11.62 0.3 undecidable manual P 122 23.5542 107 0.21 95
IT.FOPC.HGZ. 2021-09-28T16:13:10.88 0.1 undecidable manual P 13 18.7701 112 0.36 93
IV.MOMA.HHZ. 2021-09-28T16:13:09.74 0.3 undecidable manual S 269 6.4935 139 -0.14 74
IT.GNU.HGZ. 2021-09-28T16:13:09.79 0.6 undecidable manual S 269 6.3936 139 -0.09 50
IT.GNU.HGZ. 2021-09-28T16:13:08.55 0.1 undecidable manual P 269 6.3936 139 0.12 100
IV.MOMA.HHZ. 2021-09-28T16:13:08.53 0.1 positive manual P 269 6.4935 139 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:2.7 0.003385 0.3 AML other m 2021-09-28T16:13:16.31
IV.CESX.HHE. ML:2.6 0.00292 0.26 AML other m 2021-09-28T16:13:16.33
IV.ASSB.HHN. ML:2.5 0.001735 0.16 AML other m 2021-09-28T16:13:16.35
IV.ASSB.HHE. ML:2.4 0.001435 0.3 AML other m 2021-09-28T16:13:16.42
IV.GAVE.EHE. ML:2.4 0.0014650000000000002 0.34 AML other m 2021-09-28T16:13:16.90
IV.GAVE.HNE. ML:2.4 0.001545 0.34 AML other m 2021-09-28T16:13:16.90
IV.GAVE.EHN. ML:2.3 0.00131 0.92 AML other m 2021-09-28T16:13:16.99
IV.ARRO.EHE. ML:2.3 0.001215 0.68 AML other m 2021-09-28T16:13:17.05
IV.GAVE.HNN. ML:1.9 0.00047450000000000004 0.58 AML other m 2021-09-28T16:13:18.49
IV.CESI.HHE. ML:2.1 0.000609 1.36 AML other m 2021-09-28T16:13:18.19
IV.ARRO.EHN. ML:2.2 0.0010445 0.5 AML other m 2021-09-28T16:13:20.37
IV.CESI.HHN. ML:2.4 0.0011949999999999999 0.32 AML other m 2021-09-28T16:13:20.47
IV.NRCA.HHE. ML:2.4 0.0009295 1.42 AML other m 2021-09-28T16:13:21.98
IV.ATCC.EHE. ML:2.4 0.000888 0.24 AML other m 2021-09-28T16:13:21.58
IV.NRCA.HHN. ML:2.2 0.0006365 0.44 AML other m 2021-09-28T16:13:21.72
IV.LNSS.HHE. ML:2.4 0.0009595000000000001 1.08 AML other m 2021-09-28T16:13:22.03
IV.MML1.EHE. ML:2.2 0.0005110000000000001 0.14 AML other m 2021-09-28T16:13:22.62
IV.MML1.HNE. ML:2.2 0.000494 0.14 AML other m 2021-09-28T16:13:22.62
IV.FDMO.HHN. ML:2.1 0.00038149999999999995 0.34 AML other m 2021-09-28T16:13:23.01
IV.LNSS.HHN. ML:2.3 0.000759 0.6 AML other m 2021-09-28T16:13:23.48
IV.MML1.EHN. ML:2.2 0.000528 0.48 AML other m 2021-09-28T16:13:23.62
IV.MML1.HNN. ML:2.2 0.0005335000000000001 0.6 AML other m 2021-09-28T16:13:23.62
IV.ATCC.EHN. ML:2.4 0.0008075 0.2 AML other m 2021-09-28T16:13:24.09
IV.MGAB.HHE. ML:2.3 0.0005549999999999999 0.28 AML other m 2021-09-28T16:13:24.40
IV.MGAB.HNE. ML:2.2 0.000504 0.26 AML other m 2021-09-28T16:13:24.40
IV.FDMO.HHE. ML:2.1 0.00038250000000000003 0.96 AML other m 2021-09-28T16:13:24.47
IV.MURB.HNN. ML:2.8 0.001585 1.04 AML other m 2021-09-28T16:13:24.86
IV.MURB.HHN. ML:2.8 0.0017549999999999998 1.04 AML other m 2021-09-28T16:13:24.87
IV.SNTG.HHE. ML:2.1 0.000273 1.42 AML other m 2021-09-28T16:13:26.84
IV.CSP1.EHN. ML:2.5 0.0008415 0.18 AML other m 2021-09-28T16:13:26.14
IV.MURB.HNE. ML:2.9 0.001955 0.26 AML other m 2021-09-28T16:13:26.27
IV.MURB.HHE. ML:2.9 0.0020949999999999996 0.24 AML other m 2021-09-28T16:13:26.15
IV.MGAB.HNN. ML:2.3 0.000569 0.22 AML other m 2021-09-28T16:13:26.56
IV.MGAB.HHN. ML:2.3 0.0006115 0.2 AML other m 2021-09-28T16:13:26.45
IV.RM33.EHN. ML:2.2 0.000359 0.18 AML other m 2021-09-28T16:13:26.71
IV.SNTG.HHN. ML:2.3 0.000489 0.2 AML other m 2021-09-28T16:13:27.04
IV.CSP1.EHE. ML:2.5 0.000822 0.28 AML other m 2021-09-28T16:13:27.38
IV.RM33.EHE. ML:2.0 0.000251 0.6 AML other m 2021-09-28T16:13:28.73
IV.GUMA.HHN. ML:2.5 0.000624 1.54 AML other m 2021-09-28T16:13:29.91
IV.SMA1.EHE. ML:2.3 0.00041400000000000003 0.84 AML other m 2021-09-28T16:13:29.44
IV.SRES.HHN. ML:1.9 0.0001645 1.38 AML other m 2021-09-28T16:13:29.85
IV.EL6.EHE. ML:2.9 0.0013399999999999998 0.18 AML other m 2021-09-28T16:13:29.87
IV.EL6.EHN. ML:2.5 0.0005635 0.16 AML other m 2021-09-28T16:13:30.31
IV.SSFR.HHE. ML:2.5 0.0005340000000000001 0.18 AML other m 2021-09-28T16:13:30.51
IV.MTRA.EHE. ML:2.2 0.0003205 0.5 AML other m 2021-09-28T16:13:31.52
IV.ATVO.HHN. ML:2.0 0.000191 0.38 AML other m 2021-09-28T16:13:32.19
IV.CING.HHE. ML:2.2 0.00023099999999999998 0.2 AML other m 2021-09-28T16:13:32.24
IV.SSFR.HNN. ML:2.5 0.000551 0.2 AML other m 2021-09-28T16:13:32.63
IV.SRES.HHE. ML:2.0 0.000184 0.44 AML other m 2021-09-28T16:13:32.55
IV.ATMI.HHN. ML:2.7 0.0008694999999999999 0.36 AML other m 2021-09-28T16:13:32.74
IV.ATMI.HHE. ML:2.6 0.000653 1.16 AML other m 2021-09-28T16:13:32.18
IV.SSFR.HNE. ML:2.5 0.0005520000000000001 1.44 AML other m 2021-09-28T16:13:32.13
IV.CING.HHN. ML:2.4 0.000375 0.2 AML other m 2021-09-28T16:13:32.84
IV.SSFR.HHN. ML:2.5 0.000497 0.16 AML other m 2021-09-28T16:13:32.96
IV.ATVO.HHE. ML:2.2 0.00025550000000000003 0.48 AML other m 2021-09-28T16:13:33.29
IV.MTRA.EHN. ML:2.1 0.0002415 1.3 AML other m 2021-09-28T16:13:33.13
IV.SMA1.EHN. ML:2.3 0.0004535 1.46 AML other m 2021-09-28T16:13:33.73
IV.ATPI.EHN. ML:2.2 0.000248 0.36 AML other m 2021-09-28T16:13:33.85
IV.FIAM.HHE. ML:1.8 0.0000991 0.5 AML other m 2021-09-28T16:13:34.51
IV.PIEI.HHN. ML:2.0 0.000128 0.32 AML other m 2021-09-28T16:13:35.67
IV.FIAM.HHN. ML:1.8 0.00010765 0.36 AML other m 2021-09-28T16:13:35.72
IV.PIEI.HHE. ML:2.0 0.000151 0.2 AML other m 2021-09-28T16:13:35.72
IV.ATPI.EHE. ML:2.1 0.0001875 1.64 AML other m 2021-09-28T16:13:36.98
IV.CAFI.HHE. ML:2.0 0.00012855 0.28 AML other m 2021-09-28T16:13:36.39
IV.NARO.HHE. ML:1.8 0.00007345 0.74 AML other m 2021-09-28T16:13:36.71
IV.GUMA.HHE. ML:2.6 0.0007465 0.5 AML other m 2021-09-28T16:13:36.87
IV.CAFI.HHN. ML:2.0 0.0001385 1.68 AML other m 2021-09-28T16:13:36.07
IV.PARC.HHE. ML:2.2 0.0001515 0.54 AML other m 2021-09-28T16:13:41.72
IV.PARC.HHN. ML:2.1 0.0001175 0.4 AML other m 2021-09-28T16:13:43.52
IV.NARO.HHN. ML:1.7 0.00005985 1.44 AML other m 2021-09-28T16:13:44.13
IV.CRE.HHN. ML:2.0 0.0000888 0.4 AML other m 2021-09-28T16:13:45.46
IV.CRE.HHE. ML:1.9 0.00006470000000000001 1.3 AML other m 2021-09-28T16:13:45.80
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
Waveforms Seismic signals in miniseed + resp format Download