Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 01-10-2021 and time 02:55:21 (Italy) in region 7 km SE Norcia (PG)

A magnitude ML 1.5 earthquake occured in region: 7 km SE Norcia (PG), on

  • 01-10-2021 00:55:21 (UTC)
  • 01-10-2021 02:55:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7380, 13.1190 at 9 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
Norcia PG 7 4957 4957
Cascia PG 9 3217 8174
Accumoli RI 12 667 8841
Cittareale RI 14 482 9323
Arquata del Tronto AP 15 1178 10501
Poggiodomo PG 15 117 10618
Monteleone di Spoleto PG 17 599 11217
Preci PG 17 724 11941
Castelsantangelo sul Nera MC 18 281 12222
Amatrice RI 18 2657 14879
Cerreto di Spoleto PG 19 1075 15954

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km SE of Foligno (57155 inhabitants)
43 Km E of Terni (111501 inhabitants)
49 Km NW of L'Aquila (69753 inhabitants)
49 Km W of Teramo (54892 inhabitants)
72 Km SE of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km N of Tivoli (56533 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
95 Km W of Pescara (121014 inhabitants)
96 Km W of Chieti (51815 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 2021-10-01
00:55:21		 42.7375 13.1192 9 2022-03-30
13:04:19		 Bollettino Sismico Italiano INGV 97973811
Reviewed
Rev100 		ML 1.5 2021-10-01
00:55:21		 42.7393 13.12 9 2021-10-01
01:05:11		 Sala Sismica INGV-Roma 96082961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-01 00:55:21 ± 0.05
Latitude 42.7375 ± 0.0027
Longitude 13.1192 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97973811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 341
Semi-minor axis of confidence ellipse (meter) 302
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 40
Number of associated phases, regardless of their use for origin computation 53
Number of defining phases 46
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.64032
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 31
Type of magnitude ML
Reference to an origin 97973811
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-30 14:02:35

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 31
Type of magnitude ML
Reference to an origin 96082961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-01 01:05:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CDRU.HHZ. 2021-10-01T00:56:45.19 3.0 undecidable manual Sg 12.09 0
IX.PGN3.HHZ.02 2021-10-01T00:56:42.83 3.0 undecidable manual Sg 5.64 0
IX.SNR3.EHZ.02 2021-10-01T00:56:29.01 3.0 undecidable manual Sn 2 0
IX.MNT3.EHZ.02 2021-10-01T00:56:23.41 3.0 undecidable manual Sn 0.42 0
TV.SF04.EHZ. 2021-10-01T00:55:55.47 3.0 undecidable manual S -2.08 0
IV.FIR.HHZ. 2021-10-01T00:55:49.31 3.0 undecidable manual Pn -0.44 0
IV.ARVD.HHZ. 2021-10-01T00:55:48.64 3.0 undecidable manual S -1.2 0
IV.CING.HHZ. 2021-10-01T00:55:44.08 0.6 undecidable manual S 5 71.0733 50 0.73 37
IV.EL6.EHZ. 2021-10-01T00:55:42.51 0.3 undecidable manual S 359 65.6898 50 0.6 59
IV.ATCC.EHZ. 2021-10-01T00:55:41.89 0.6 undecidable manual S 322 63.0924 50 0.67 39
IV.SNTG.HHZ. 2021-10-01T00:55:40.60 0.3 undecidable manual S 346 59.1963 50 0.41 63
IV.MOMA.HHZ. 2021-10-01T00:55:36.86 0.3 undecidable manual S 280 45.3213 50 0.38 66
IV.GUMA.HHZ. 2021-10-01T00:55:35.31 0.3 undecidable manual S 26 40.1265 50 0.22 69
IV.MF5.EHZ. 2021-10-01T00:55:35.76 0.6 undecidable manual S 45 39.2274 50 0.91 36
IV.MML1.EHZ. 2021-10-01T00:55:35.90 0.3 undecidable manual S 344 43.4232 50 -0.07 70
IV.CSP1.EHZ. 2021-10-01T00:55:34.90 0.1 undecidable manual S 10 39.9267 50 -0.14 93
IV.TERO.HNZ. 2021-10-01T00:55:34.96 0.3 undecidable manual S 108 41.5251 50 -0.51 64
IV.CING.HHZ. 2021-10-01T00:55:33.99 0.3 undecidable manual P 5 71.0733 50 -0.1 66
IV.CESI.HHZ. 2021-10-01T00:55:33.31 0.3 undecidable manual S 330 34.4433 50 -0.26 69
IV.EL6.EHZ. 2021-10-01T00:55:33.11 0.1 undecidable manual P 359 65.6898 50 -0.15 88
IV.SNTG.HHZ. 2021-10-01T00:55:32.35 0.3 undecidable manual P 346 59.1963 50 0.08 68
IV.FDMO.HHZ. 2021-10-01T00:55:32.71 0.6 undecidable manual S 356 33.2445 50 -0.56 43
IV.ATCC.EHZ. 2021-10-01T00:55:32.87 0.3 undecidable manual P 322 63.0924 50 0.01 69
IV.MNTT.EHZ. 2021-10-01T00:55:32.08 0.3 undecidable manual P 47 52.9026 50 0.79 56
IV.MMO1.EHZ. 2021-10-01T00:55:30.21 0.1 undecidable manual S 43 24.6531 110 -0.33 92
IV.ASSB.HHZ. 2021-10-01T00:55:30.76 0.3 undecidable manual P 312 50.4162 50 -0.16 68
IV.RM33.EHZ. 2021-10-01T00:55:30.83 0.1 undecidable manual S 163 26.5512 109 -0.32 92
IV.MOMA.HHZ. 2021-10-01T00:55:30.08 0.1 undecidable manual P 280 45.3213 50 -0.05 94
IV.CESX.HHZ. 2021-10-01T00:55:30.23 0.6 undecidable manual P 252 45.7209 50 0.04 47
IV.CSP1.EHZ. 2021-10-01T00:55:29.00 0.1 undecidable manual P 10 39.9267 50 -0.29 90
IV.MML1.EHZ. 2021-10-01T00:55:29.66 0.1 undecidable manual P 344 43.4232 50 -0.17 92
IV.TERO.HNZ. 2021-10-01T00:55:29.14 0.3 undecidable manual P 108 41.5251 50 -0.4 66
IV.MC2.EHZ. 2021-10-01T00:55:29.58 0.1 undecidable manual S 16 20.0688 114 0.51 89
IV.SMA1.EHZ. 2021-10-01T00:55:29.94 0.3 undecidable manual S 124 21.2676 113 0.5 67
IV.GUMA.HHZ. 2021-10-01T00:55:29.34 0.3 positive manual P 26 40.1265 50 0.01 71
IV.MTRA.EHZ. 2021-10-01T00:55:29.77 0.1 undecidable manual S 85 22.6551 111 -0.13 96
IV.MF5.EHZ. 2021-10-01T00:55:29.36 0.3 positive manual P 45 39.2274 50 0.17 69
IV.GAVE.EHZ. 2021-10-01T00:55:28.95 0.6 undecidable manual S 255 18.9699 115 0.22 47
IV.ARRO.EHZ. 2021-10-01T00:55:28.04 0.1 undecidable manual P 239 33.744 50 -0.31 91
IV.T1299.HNN. 2021-10-01T00:55:28.66 0.1 undecidable manual S 131 17.5713 117 0.39 92
IV.CESI.HHZ. 2021-10-01T00:55:28.18 0.1 undecidable manual P 330 34.4433 50 -0.27 91
IV.LNSS.HHZ. 2021-10-01T00:55:28.03 0.1 undecidable manual S 203 16.2726 119 0.15 96
IV.FDMO.HHZ. 2021-10-01T00:55:27.89 0.1 positive manual P 356 33.2445 50 -0.38 89
IV.MTRA.EHZ. 2021-10-01T00:55:26.25 0.1 positive manual P 85 22.6551 111 -0.08 97
IV.MMO1.EHZ. 2021-10-01T00:55:26.44 0.1 positive manual P 43 24.6531 110 -0.25 93
IV.RM33.EHZ. 2021-10-01T00:55:26.79 0.1 positive manual P 163 26.5512 109 -0.26 93
IV.SMA1.EHZ. 2021-10-01T00:55:26.20 0.1 undecidable manual P 124 21.2676 113 0.14 96
IV.LNSS.HHZ. 2021-10-01T00:55:25.27 0.1 positive manual P 203 16.2726 119 0.11 97
IV.GAVE.EHZ. 2021-10-01T00:55:25.74 0.1 positive manual P 255 18.9699 115 0.09 97
IV.NRCA.HNZ. 2021-10-01T00:55:25.87 0.1 undecidable manual S 358 10.6782 130 -0.39 93
IV.MC2.EHZ. 2021-10-01T00:55:25.84 0.1 undecidable manual P 16 20.0688 114 -0.01 99
IV.T1299.HNN. 2021-10-01T00:55:25.65 0.1 undecidable manual P 131 17.5713 117 0.26 94
IV.NRCA.HNZ. 2021-10-01T00:55:24.20 0.1 positive manual P 358 10.6782 130 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.0 0.00127 0.08 AML other m 2021-10-01T00:55:26.50
IV.NRCA.HHE. ML:2.0 0.0014 0.08 AML other m 2021-10-01T00:55:26.50
IV.NRCA.HHN. ML:1.8 0.000843 0.34 AML other m 2021-10-01T00:55:26.56
IV.NRCA.HNN. ML:1.7 0.0007050000000000001 0.34 AML other m 2021-10-01T00:55:26.69
IV.LNSS.HHE. ML:1.6 0.0003965 0.12 AML other m 2021-10-01T00:55:29.00
IV.MTRA.EHN. ML:1.6 0.000246 0.86 AML other m 2021-10-01T00:55:29.93
IV.LNSS.HHN. ML:1.6 0.00033350000000000003 0.72 AML other m 2021-10-01T00:55:30.40
IV.MTRA.HNE. ML:1.6 0.00027049999999999996 0.26 AML other m 2021-10-01T00:55:30.21
IV.GAVE.EHN. ML:1.6 0.00034399999999999996 0.16 AML other m 2021-10-01T00:55:30.15
IV.MTRA.HNN. ML:1.6 0.000236 0.28 AML other m 2021-10-01T00:55:30.21
IV.SMA1.EHN. ML:1.6 0.000266 0.92 AML other m 2021-10-01T00:55:30.09
IV.SMA1.EHE. ML:1.5 0.0002415 0.86 AML other m 2021-10-01T00:55:30.15
IV.GAVE.EHE. ML:1.6 0.0003045 1.06 AML other m 2021-10-01T00:55:30.83
IV.MTRA.EHE. ML:1.6 0.000275 0.18 AML other m 2021-10-01T00:55:31.10
IV.RM33.EHE. ML:1.2 0.0000954 1.02 AML other m 2021-10-01T00:55:31.82
IV.RM33.EHN. ML:1.2 0.00009554999999999999 0.5 AML other m 2021-10-01T00:55:32.15
IV.FDMO.HHE. ML:1.2 0.0000766 0.64 AML other m 2021-10-01T00:55:34.95
IV.FDMO.HHN. ML:1.2 0.0000722 0.96 AML other m 2021-10-01T00:55:34.81
IV.ARRO.EHN. ML:1.3 0.0000818 0.84 AML other m 2021-10-01T00:55:34.48
IV.CSP1.EHN. ML:1.7 0.00019 0.32 AML other m 2021-10-01T00:55:35.31
IV.ARRO.EHE. ML:1.3 0.0000819 0.2 AML other m 2021-10-01T00:55:35.38
IV.CSP1.EHE. ML:2.0 0.0003155 1 AML other m 2021-10-01T00:55:35.48
IV.MML1.EHN. ML:1.3 0.000057900000000000005 0.88 AML other m 2021-10-01T00:55:36.65
IV.GUMA.HHE. ML:1.7 0.00017749999999999998 0.2 AML other m 2021-10-01T00:55:36.53
IV.GUMA.HHN. ML:1.6 0.000143 0.42 AML other m 2021-10-01T00:55:36.83
IV.MML1.EHE. ML:1.3 0.00006105 0.48 AML other m 2021-10-01T00:55:37.55
IV.MOMA.HHN. ML:1.4 0.00007149999999999999 1.28 AML other m 2021-10-01T00:55:37.99
IV.ASSB.HHE. ML:1.2 0.00003875 1.32 AML other m 2021-10-01T00:55:38.29
IV.MOMA.HHE. ML:1.3 0.00006565 0.44 AML other m 2021-10-01T00:55:39.02
IV.CESX.HHE. ML:1.2 0.00004765 0.7 AML other m 2021-10-01T00:55:40.00
IV.ASSB.HHN. ML:1.3 0.00004955 0.8 AML other m 2021-10-01T00:55:40.43
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