Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 01-09-2021 and time 17:25:16 (Italy) in region 2 km SE Norcia (PG)

A magnitude ML 1.6 earthquake occured in region: 2 km SE Norcia (PG), on

  • 01-09-2021 15:25:16 (UTC)
  • 01-09-2021 17:25:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7840, 13.1100 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
Norcia PG 2 4957 4957
Cascia PG 11 3217 8174
Preci PG 12 724 8898
Castelsantangelo sul Nera MC 13 281 9179
Accumoli RI 15 667 9846
Arquata del Tronto AP 15 1178 11024
Cerreto di Spoleto PG 16 1075 12099
Poggiodomo PG 16 117 12216
Visso MC 17 1107 13323
Ussita MC 18 444 13767
Sellano PG 19 1079 14846
Cittareale RI 19 482 15328
Montegallo AP 19 523 15851
Monteleone di Spoleto PG 20 599 16450

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SE of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
92 Km E of Viterbo (67173 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
97 Km W of Pescara (121014 inhabitants)
99 Km SW of Ancona (100861 inhabitants)
99 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 1.6 2021-09-01
15:25:16		 42.7842 13.1098 10 2022-03-30
13:04:41		 Bollettino Sismico Italiano INGV 102050991
Reviewed
Rev100 		ML 1.5 2021-09-01
15:25:17		 42.7853 13.1112 10 2021-09-01
15:33:21		 Sala Sismica INGV-Roma 94921161
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-01 15:25:16 ± 0.04
Latitude 42.7842 ± 0.0018
Longitude 13.1098 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 102050991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 257
Semi-minor axis of confidence ellipse (meter) 176
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 92
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 43
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 42
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.69428
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 102050991
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-17 00:09:28

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 94921161
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-01 15:33:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOCL.EHZ. 2021-09-01T15:26:18.61 3.0 undecidable manual Sg 6.54 0
IV.LAV9.HHZ. 2021-09-01T15:25:53.37 3.0 undecidable manual S -1.22 0
IV.CRTC.HHZ. 2021-09-01T15:25:35.19 3.0 undecidable manual P -0.76 0
IV.T0110.HHZ. 2021-09-01T15:25:31.52 3.0 positive manual P -0.07 0
IV.SSFR.HHZ. 2021-09-01T15:25:30.83 0.3 undecidable manual P 340 77.0673 50 0.41 62
IV.MML1.EHZ. 2021-09-01T15:25:29.79 0.6 undecidable manual S 343 38.2284 50 -0.1 47
IV.GUMA.HHZ. 2021-09-01T15:25:29.86 0.6 undecidable manual S 31 35.9418 50 0.58 42
IV.ARRO.EHZ. 2021-09-01T15:25:29.32 0.6 undecidable manual S 231 36.1416 50 -0.01 49
IV.CING.HHZ. 2021-09-01T15:25:28.87 0.3 undecidable manual P 6 65.9895 50 0.16 67
IV.RM33.EHZ. 2021-09-01T15:25:28.01 0.6 undecidable manual S 164 31.6461 50 -0.14 48
IV.CSP1.EHZ. 2021-09-01T15:25:28.99 0.6 undecidable manual S 13 35.0427 50 -0.04 48
IV.CESI.HHZ. 2021-09-01T15:25:27.38 0.6 undecidable manual S 326 29.6481 50 -0.22 47
IV.EL6.EHZ. 2021-09-01T15:25:27.88 0.1 undecidable manual P 359 60.495 50 0.01 93
IV.ATCC.EHZ. 2021-09-01T15:25:27.61 0.3 undecidable manual P 320 58.5969 50 0.04 70
IV.FDMO.HHZ. 2021-09-01T15:25:26.79 0.6 undecidable manual S 356 28.0497 50 -0.39 46
IT.MTCL.HGZ. 2021-09-01T15:25:26.18 0.6 undecidable manual S 339 24.9528 112 -0.11 49
IV.SMA1.EHZ. 2021-09-01T15:25:26.18 0.6 undecidable manual S 133 25.0527 112 -0.15 48
IV.MTRA.EHZ. 2021-09-01T15:25:25.64 0.6 undecidable manual S 97 23.5542 113 -0.2 48
IV.MOMA.HHZ. 2021-09-01T15:25:25.39 0.3 undecidable manual P 273 44.0226 50 0.07 71
IV.T1299.HNZ. 2021-09-01T15:25:25.61 0.6 undecidable manual S 140 21.7671 115 0.33 47
IV.ASSB.HHZ. 2021-09-01T15:25:25.55 0.3 undecidable manual P 308 46.5201 50 -0.17 69
IV.MMO1.EHN. 2021-09-01T15:25:25.03 0.3 undecidable manual S 54 21.7671 114 -0.25 71
IV.TERO.HHZ. 2021-09-01T15:25:25.06 0.3 undecidable manual P 114 44.0226 50 -0.28 68
IV.ARRO.EHZ. 2021-09-01T15:25:24.45 0.3 undecidable manual P 231 36.1416 50 0.34 68
IV.MF5.EHZ. 2021-09-01T15:25:24.61 0.3 undecidable manual P 51 36.3414 50 0.47 66
IV.FEMA.HNE. 2021-09-01T15:25:24.75 0.6 undecidable manual S 346 20.3685 116 -0.08 49
IV.MML1.EHZ. 2021-09-01T15:25:24.24 0.1 undecidable manual P 343 38.2284 50 -0.2 93
IV.LNSS.HHZ. 2021-09-01T15:25:24.90 0.6 undecidable manual S 196 20.868 115 -0.1 49
IV.GUMA.HHZ. 2021-09-01T15:25:24.33 0.1 undecidable manual P 31 35.9418 50 0.25 93
IV.GAVE.EHZ. 2021-09-01T15:25:24.81 0.6 undecidable manual S 240 20.3685 116 -0.01 50
IV.RM33.EHZ. 2021-09-01T15:25:23.16 0.1 undecidable manual P 164 31.6461 50 -0.27 93
IV.CSP1.EHZ. 2021-09-01T15:25:23.88 0.1 undecidable manual P 13 35.0427 50 -0.06 96
IV.MC2.EHZ. 2021-09-01T15:25:23.59 0.6 undecidable manual S 24 15.4734 123 0.22 48
IV.CESI.HHZ. 2021-09-01T15:25:23.03 0.1 positive manual P 326 29.6481 50 -0.08 97
IT.MTCL.HGZ. 2021-09-01T15:25:22.22 0.1 undecidable manual P 339 24.9528 112 -0.14 97
IV.SMA1.EHZ. 2021-09-01T15:25:22.31 0.1 positive manual P 133 25.0527 112 -0.07 98
IV.FDMO.HHZ. 2021-09-01T15:25:22.72 0.1 positive manual P 356 28.0497 50 -0.15 96
IV.LNSS.HHZ. 2021-09-01T15:25:21.65 0.1 undecidable manual P 196 20.868 115 0.04 99
IV.MMO1.EHN. 2021-09-01T15:25:21.79 0.3 undecidable manual P 54 21.7671 114 0.02 75
IV.GAVE.EHZ. 2021-09-01T15:25:21.70 0.3 undecidable manual P 240 20.3685 116 0.19 72
IV.MTRA.EHZ. 2021-09-01T15:25:21.95 0.1 undecidable manual P 97 23.5542 113 -0.14 97
IV.T1299.HNZ. 2021-09-01T15:25:21.90 0.1 undecidable manual P 140 21.7671 115 0.13 97
IV.FEMA.HNE. 2021-09-01T15:25:21.51 0.3 undecidable manual P 346 20.3685 116 0 75
IV.NRCA.HNZ. 2021-09-01T15:25:20.67 0.6 undecidable manual S 4 5.4945 151 -0.24 49
IV.MC2.EHZ. 2021-09-01T15:25:20.90 0.1 undecidable manual P 24 15.4734 123 0.23 96
IV.NRCA.HNZ. 2021-09-01T15:25:19.38 0.1 positive manual P 4 5.4945 151 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.4 0.00421 0.16 AML other m 2021-09-01T15:25:20.77
IV.NRCA.HHN. ML:2.4 0.004640000000000001 0.1 AML other m 2021-09-01T15:25:20.68
IV.NRCA.HNN. ML:2.4 0.004055 0.14 AML other m 2021-09-01T15:25:20.68
IV.NRCA.HHE. ML:2.4 0.004515000000000001 0.08 AML other m 2021-09-01T15:25:20.77
IV.LNSS.HNN. ML:1.8 0.0004425 0.92 AML other m 2021-09-01T15:25:25.45
IV.GAVE.EHE. ML:1.6 0.000303 1.02 AML other m 2021-09-01T15:25:25.01
IV.LNSS.HNE. ML:1.8 0.000395 0.3 AML other m 2021-09-01T15:25:25.74
IV.LNSS.HHE. ML:1.8 0.0004365 0.14 AML other m 2021-09-01T15:25:25.74
IV.GAVE.EHN. ML:1.6 0.00027800000000000004 0.54 AML other m 2021-09-01T15:25:25.81
IV.MTRA.EHE. ML:1.7 0.0003045 0.66 AML other m 2021-09-01T15:25:26.03
IV.MTRA.EHN. ML:1.6 0.0002385 0.16 AML other m 2021-09-01T15:25:26.61
IV.MTRA.HNE. ML:1.7 0.0003035 0.2 AML other m 2021-09-01T15:25:26.86
IV.MTRA.HNN. ML:1.7 0.000301 1.1 AML other m 2021-09-01T15:25:27.61
IV.LNSS.HHN. ML:1.6 0.0003215 0.2 AML other m 2021-09-01T15:25:27.39
IV.CESI.HHN. ML:1.6 0.0001795 0.24 AML other m 2021-09-01T15:25:27.63
IV.CESI.HHE. ML:1.3 0.00009814999999999999 0.68 AML other m 2021-09-01T15:25:27.57
IV.FDMO.HHN. ML:1.4 0.000129 0.26 AML other m 2021-09-01T15:25:27.76
IV.FDMO.HHE. ML:1.3 0.0001155 0.82 AML other m 2021-09-01T15:25:28.19
IV.RM33.EHN. ML:1.5 0.0001485 0.14 AML other m 2021-09-01T15:25:28.37
IV.RM33.EHE. ML:1.4 0.00011350000000000001 0.42 AML other m 2021-09-01T15:25:29.43
IV.SMA1.EHE. ML:1.6 0.00023299999999999997 0.42 AML other m 2021-09-01T15:25:29.89
IV.CSP1.EHE. ML:1.7 0.0001825 0.36 AML other m 2021-09-01T15:25:29.75
IV.CSP1.EHN. ML:1.7 0.000207 0.68 AML other m 2021-09-01T15:25:29.41
IV.SMA1.EHN. ML:1.6 0.00021349999999999999 1.66 AML other m 2021-09-01T15:25:29.00
IV.GUMA.HHN. ML:1.6 0.0001535 0.54 AML other m 2021-09-01T15:25:30.68
IV.ARRO.EHE. ML:1.2 0.00005415 1.82 AML other m 2021-09-01T15:25:31.95
IV.ARRO.EHN. ML:1.2 0.00005665 0.18 AML other m 2021-09-01T15:25:31.17
IV.MML1.EHN. ML:1.3 0.0000805 0.84 AML other m 2021-09-01T15:25:31.98
IV.MML1.EHE. ML:1.3 0.0000703 0.26 AML other m 2021-09-01T15:25:31.53
IV.GUMA.HHE. ML:1.6 0.0001375 0.58 AML other m 2021-09-01T15:25:33.10
IV.ASSB.HHE. ML:1.2 0.00004285 0.82 AML other m 2021-09-01T15:25:33.45
IV.MOMA.HHE. ML:1.5 0.00009345000000000001 0.24 AML other m 2021-09-01T15:25:33.59
IV.MOMA.HHN. ML:1.6 0.0001375 0.22 AML other m 2021-09-01T15:25:33.67
IV.ASSB.HHN. ML:1.2 0.000051000000000000006 0.56 AML other m 2021-09-01T15:25:34.01
IV.SSFR.HHN. ML:1.5 0.000044200000000000004 1.46 AML other m 2021-09-01T15:25:43.19
IV.SSFR.HHE. ML:1.5 0.00004595 0.18 AML other m 2021-09-01T15:25:44.03
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