Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 01-11-2021 and time 02:25:27 (Italy) in region 2 km NE Norcia (PG)

A magnitude ML 1.7 earthquake occured in region: 2 km NE Norcia (PG), on

  • 01-11-2021 01:25:27 (UTC)
  • 01-11-2021 02:25:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8060, 13.1110 at 11 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 2 4957 4957
Preci PG 10 724 5681
Castelsantangelo sul Nera MC 11 281 5962
Cascia PG 12 3217 9179
Visso MC 14 1107 10286
Ussita MC 16 444 10730
Arquata del Tronto AP 16 1178 11908
Cerreto di Spoleto PG 16 1075 12983
Accumoli RI 17 667 13650
Sellano PG 18 1079 14729
Poggiodomo PG 18 117 14846
Montegallo AP 19 523 15369

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
98 Km W of Pescara (121014 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 2021-11-01
01:25:27		 42.8055 13.1108 11 2022-03-30
13:04:27		 Bollettino Sismico Italiano INGV 99360901
Reviewed
Rev100 		ML 1.8 2021-11-01
01:25:27		 42.799 13.1125 10 2021-11-01
01:30:33		 Sala Sismica INGV-Roma 97127011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-01 01:25:27 ± 0.04
Latitude 42.8055 ± 0.0018
Longitude 13.1108 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99360901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 290
Semi-minor axis of confidence ellipse (meter) 162
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 84
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 34
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 48
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) 0.02788
Epicentral distance of station farthest from the epicenter (degree) 0.70327
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 35
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 64
Type of magnitude ML
Reference to an origin 99360901
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-05 14:12:21

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 97127011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-01 01:30:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VCEL.EHZ. 2021-11-01T01:25:41.19 0.6 undecidable manual P 127 75.0693 50 0.52 42
IV.ARVD.HHZ. 2021-11-01T01:25:40.96 0.6 undecidable manual P 350 78.0663 50 -0.17 43
IV.EL6.EHZ. 2021-11-01T01:25:38.09 0.3 undecidable manual P 359 58.0974 50 0.03 69
IV.CING.HHZ. 2021-11-01T01:25:38.90 0.6 undecidable manual P 6 63.5919 50 -0.01 45
IV.CSP1.EHZ. 2021-11-01T01:25:38.70 0.3 undecidable manual S 13 32.6451 50 -0.19 69
IV.FIAM.HHZ. 2021-11-01T01:25:38.16 0.3 undecidable manual P 179 59.5959 50 -0.14 67
IV.SNTG.HHZ. 2021-11-01T01:25:37.03 0.1 undecidable manual P 345 51.7038 50 -0.05 92
IV.ATCC.EHZ. 2021-11-01T01:25:37.91 0.6 undecidable manual P 318 56.8986 50 0.04 46
IV.CESI.HHZ. 2021-11-01T01:25:37.50 0.3 undecidable manual S 323 27.75 50 -0.08 71
IV.MNTT.EHZ. 2021-11-01T01:25:37.41 0.3 undecidable manual P 54 48.618 50 0.81 59
IV.SMA1.EHZ. 2021-11-01T01:25:37.40 0.6 undecidable manual S 137 26.6511 50 0.11 49
IV.FDMO.HHZ. 2021-11-01T01:25:36.80 0.3 undecidable manual S 356 25.6521 50 -0.23 69
IV.CESX.HHZ. 2021-11-01T01:25:36.47 0.3 undecidable manual P 243 48.0186 50 -0.03 70
IV.ASSB.HHZ. 2021-11-01T01:25:36.10 0.3 undecidable manual P 306 45.2214 50 0.03 71
IV.MTRA.EHZ. 2021-11-01T01:25:36.20 0.3 undecidable manual S 103 23.8539 50 -0.35 68
IV.LNSS.HHZ. 2021-11-01T01:25:36.20 0.3 undecidable manual S 194 23.1546 50 -0.16 71
IV.OFFI.HHZ. 2021-11-01T01:25:36.22 0.6 undecidable manual P 73 48.9177 50 -0.42 43
IV.MOMA.HHZ. 2021-11-01T01:25:36.24 0.3 undecidable manual P 270 44.0226 50 0.35 68
IV.T1299.HNN. 2021-11-01T01:25:36.80 0.3 undecidable manual S 144 23.5542 50 0.33 72
IV.SAP2.EHE. 2021-11-01T01:25:35.36 0.3 undecidable manual P 36 39.9267 50 0.1 73
IV.GAVE.EHZ. 2021-11-01T01:25:35.80 0.3 undecidable manual S 235 21.6672 50 -0.15 71
IT.FOPC.HGN. 2021-11-01T01:25:35.41 0.3 undecidable manual P 299 37.8288 50 0.47 67
IV.TERO.HHZ. 2021-11-01T01:25:35.83 0.3 undecidable manual P 117 45.0216 50 -0.22 68
IV.MMO1.EHZ. 2021-11-01T01:25:35.40 0.3 undecidable manual S 59 20.4684 50 -0.22 71
IT.MTCL.HGZ. 2021-11-01T01:25:35.96 0.3 undecidable manual S 337 22.755 50 -0.29 69
IV.ARRO.EHZ. 2021-11-01T01:25:34.93 0.3 undecidable manual P 228 37.7289 50 0.01 72
IV.PF6.EHN. 2021-11-01T01:25:34.76 0.1 undecidable manual P 10 37.5291 50 -0.13 93
IV.GUMA.HHZ. 2021-11-01T01:25:34.58 0.3 undecidable manual P 32 33.8439 50 0.25 71
IV.MF5.EHZ. 2021-11-01T01:25:34.83 0.3 undecidable manual P 54 34.8429 50 0.35 69
IV.CAMP.HHE. 2021-11-01T01:25:34.89 0.3 undecidable manual P 141 38.5281 50 -0.16 69
IV.FEMA.HNE. 2021-11-01T01:25:34.82 0.3 undecidable manual S 344 18.0708 121 -0.14 74
IV.RM33.EHZ. 2021-11-01T01:25:34.23 0.3 undecidable manual P 166 33.9438 50 -0.11 70
IV.MML1.EHZ. 2021-11-01T01:25:34.60 0.3 undecidable manual P 342 35.9418 50 -0.05 71
IV.CSP1.EHZ. 2021-11-01T01:25:34.07 0.1 undecidable manual P 13 32.6451 50 -0.07 95
IV.FDMO.HHZ. 2021-11-01T01:25:33.05 0.1 undecidable manual P 356 25.6521 50 -0.02 97
IV.MC2.EHZ. 2021-11-01T01:25:33.90 0.3 undecidable manual S 28 13.3755 129 0.28 71
IV.CESI.HHZ. 2021-11-01T01:25:33.45 0.3 undecidable manual P 323 27.75 50 0.06 74
IV.SMA1.EHZ. 2021-11-01T01:25:33.05 0.3 undecidable manual P 137 26.6511 50 -0.17 70
IT.MTCL.HGZ. 2021-11-01T01:25:32.60 0.3 undecidable manual P 337 22.755 50 -0.02 73
IV.MTRA.EHZ. 2021-11-01T01:25:32.60 0.1 undecidable manual P 103 23.8539 50 -0.19 94
IV.MMO1.EHZ. 2021-11-01T01:25:32.18 0.1 undecidable manual P 59 20.4684 50 -0.08 98
IV.FEMA.HNE. 2021-11-01T01:25:32.11 0.3 undecidable manual P 344 18.0708 121 0.23 72
IV.T1299.HNN. 2021-11-01T01:25:32.88 0.3 undecidable manual P 144 23.5542 50 0.14 74
IV.LNSS.HHZ. 2021-11-01T01:25:32.71 0.1 undecidable manual P 194 23.1546 50 0.03 98
IV.GAVE.EHZ. 2021-11-01T01:25:32.52 0.1 undecidable manual P 235 21.6672 50 0.07 100
IV.NRCA.HNZ. 2021-11-01T01:25:31.30 0.3 undecidable manual S 5 3.0969 164 -0.26 74
IV.MC2.EHZ. 2021-11-01T01:25:31.32 0.1 undecidable manual P 28 13.3755 129 0.22 97
IV.NRCA.HNZ. 2021-11-01T01:25:30.04 0.3 undecidable manual P 5 3.0969 164 0.13 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:2.6 0.006465 0.1 AML other m 2021-11-01T01:25:31.46
IV.NRCA.HHN. ML:2.6 0.007025 0.08 AML other m 2021-11-01T01:25:31.46
IV.NRCA.HNE. ML:2.6 0.00617 0.98 AML other m 2021-11-01T01:25:31.49
IV.NRCA.HHE. ML:2.6 0.006465 0.96 AML other m 2021-11-01T01:25:31.50
IV.GAVE.HNN. ML:1.6 0.0002465 0.46 AML other m 2021-11-01T01:25:36.15
IV.GAVE.EHN. ML:2.0 0.0006325 0.98 AML other m 2021-11-01T01:25:36.04
IV.GAVE.HNE. ML:2.2 0.0010525 0.16 AML other m 2021-11-01T01:25:36.76
IV.GAVE.EHE. ML:2.2 0.0010314999999999999 0.16 AML other m 2021-11-01T01:25:36.76
IV.LNSS.HNE. ML:2.2 0.000923 0.8 AML other m 2021-11-01T01:25:36.99
IV.LNSS.HHE. ML:2.2 0.0009405 0.8 AML other m 2021-11-01T01:25:36.99
IV.MTRA.EHE. ML:1.7 0.00028050000000000004 1.8 AML other m 2021-11-01T01:25:37.98
IV.FDMO.HHN. ML:1.6 0.0002395 1 AML other m 2021-11-01T01:25:37.60
IV.FDMO.HHE. ML:1.6 0.00021200000000000003 1.64 AML other m 2021-11-01T01:25:37.97
IV.LNSS.HHN. ML:2.2 0.000979 0.9 AML other m 2021-11-01T01:25:37.16
IV.LNSS.HNN. ML:2.2 0.001014 0.88 AML other m 2021-11-01T01:25:37.17
IV.MTRA.HNE. ML:1.7 0.00032999999999999994 0.78 AML other m 2021-11-01T01:25:37.98
IV.MTRA.HNN. ML:1.8 0.0003695 0.44 AML other m 2021-11-01T01:25:37.82
IV.MTRA.EHN. ML:1.7 0.00032250000000000003 0.86 AML other m 2021-11-01T01:25:38.71
IV.SMA1.EHN. ML:1.6 0.0002205 0.18 AML other m 2021-11-01T01:25:38.74
IV.CSP1.EHN. ML:1.9 0.00036350000000000005 0.88 AML other m 2021-11-01T01:25:39.32
IV.CSP1.EHE. ML:1.9 0.0003765 0.2 AML other m 2021-11-01T01:25:39.65
IV.RM33.HNN. ML:1.8 0.000284 0.92 AML other m 2021-11-01T01:25:40.75
IV.RM33.EHN. ML:1.6 0.000186 0.92 AML other m 2021-11-01T01:25:40.75
IV.RM33.HNE. ML:1.8 0.000265 0.94 AML other m 2021-11-01T01:25:40.08
IV.CESI.HHN. ML:1.6 0.0001915 0.22 AML other m 2021-11-01T01:25:40.55
IV.RM33.EHE. ML:1.7 0.00020750000000000003 0.96 AML other m 2021-11-01T01:25:40.08
IV.MML1.EHE. ML:1.5 0.0001205 0.18 AML other m 2021-11-01T01:25:40.77
IV.SMA1.EHE. ML:1.7 0.00026900000000000003 1.08 AML other m 2021-11-01T01:25:40.89
IV.MML1.EHN. ML:1.3 0.0000873 0.62 AML other m 2021-11-01T01:25:40.61
IV.MF5.EHE. ML:1.7 0.00021799999999999999 1.74 AML other m 2021-11-01T01:25:40.10
IV.MF5.EHN. ML:1.6 0.0001635 1.78 AML other m 2021-11-01T01:25:40.99
IV.CESI.HHE. ML:1.4 0.000129 1.12 AML other m 2021-11-01T01:25:41.23
IV.ARRO.EHN. ML:1.5 0.00012314999999999998 0.68 AML other m 2021-11-01T01:25:41.43
IV.ARRO.EHE. ML:1.5 0.0001255 0.48 AML other m 2021-11-01T01:25:41.63
IV.GUMA.HHN. ML:1.8 0.0002825 1.4 AML other m 2021-11-01T01:25:42.11
IV.GUMA.HNE. ML:1.9 0.0003395 0.3 AML other m 2021-11-01T01:25:42.81
IV.GUMA.HNN. ML:1.9 0.00031 0.6 AML other m 2021-11-01T01:25:42.66
IV.SAP2.EHN. ML:2.4 0.0009735000000000001 0.18 AML other m 2021-11-01T01:25:43.30
IV.TERO.HHN. ML:1.5 0.00010105 1.48 AML other m 2021-11-01T01:25:43.06
IV.MOMA.HHE. ML:1.7 0.000165 0.16 AML other m 2021-11-01T01:25:43.92
IV.MOMA.HHN. ML:1.5 0.000103 0.22 AML other m 2021-11-01T01:25:43.85
IV.TERO.HHE. ML:1.5 0.00010125000000000001 1.54 AML other m 2021-11-01T01:25:44.13
IV.SAP2.EHE. ML:1.8 0.00021250000000000002 0.54 AML other m 2021-11-01T01:25:44.25
IV.ASSB.HHN. ML:1.4 0.0000757 0.96 AML other m 2021-11-01T01:25:44.34
IV.GUMA.HHE. ML:2.0 0.0003765 0.4 AML other m 2021-11-01T01:25:44.73
IV.CESX.HHE. ML:1.6 0.00010545000000000002 1.3 AML other m 2021-11-01T01:25:45.14
IV.CESX.HHN. ML:1.6 0.00011949999999999999 0.32 AML other m 2021-11-01T01:25:45.23
IV.MNTT.EHN. ML:2.2 0.00039150000000000003 0.78 AML other m 2021-11-01T01:25:46.32
IV.MNTT.EHE. ML:2.2 0.00045999999999999996 1.42 AML other m 2021-11-01T01:25:46.24
IV.SNTG.HHE. ML:1.2 0.0000346 0.62 AML other m 2021-11-01T01:25:47.34
IV.FIAM.HHE. ML:1.2 0.00002785 0.42 AML other m 2021-11-01T01:25:47.28
IV.ATCC.EHE. ML:1.4 0.00005295 0.42 AML other m 2021-11-01T01:25:47.62
IV.ASSB.HHE. ML:1.5 0.0000855 0.7 AML other m 2021-11-01T01:25:48.37
IV.OFFI.HHE. ML:1.8 0.00015899999999999996 1.34 AML other m 2021-11-01T01:25:48.69
IV.EL6.EHE. ML:1.6 0.0000919 0.26 AML other m 2021-11-01T01:25:48.27
IV.EL6.EHN. ML:1.7 0.00011135000000000001 1.8 AML other m 2021-11-01T01:25:48.97
IV.OFFI.HHN. ML:1.8 0.000166 1.3 AML other m 2021-11-01T01:25:49.73
IV.CING.HHE. ML:1.4 0.0000426 0.8 AML other m 2021-11-01T01:25:49.40
IV.SNTG.HHN. ML:1.2 0.00003755 1.4 AML other m 2021-11-01T01:25:50.99
IV.FIAM.HHN. ML:1.2 0.0000307 1.34 AML other m 2021-11-01T01:25:51.89
IV.CING.HHN. ML:1.3 0.000041099999999999996 1.82 AML other m 2021-11-01T01:25:52.02
IV.ATCC.EHN. ML:1.4 0.000059949999999999994 1.4 AML other m 2021-11-01T01:25:52.97
IV.VCEL.EHN. ML:1.5 0.0000459 1.04 AML other m 2021-11-01T01:25:55.22
IV.VCEL.EHE. ML:1.5 0.0000497 1.14 AML other m 2021-11-01T01:25:55.28
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