Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 11-09-2021 and time 16:42:35 (UTC) in region 5 km W Norcia (PG)

A magnitude ML 1.7 earthquake occured in region: 5 km W Norcia (PG), on

  • 11-09-2021 16:42:35 (UTC)
  • 11-09-2021 18:42:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8080, 13.0410 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 5 4957 4957
Preci PG 8 724 5681
Cascia PG 10 3217 8898
Cerreto di Spoleto PG 10 1075 9973
Sellano PG 13 1079 11052
Castelsantangelo sul Nera MC 13 281 11333
Poggiodomo PG 14 117 11450
Visso MC 14 1107 12557
Vallo di Nera PG 15 364 12921
Ussita MC 17 444 13365
Sant'Anatolia di Narco PG 19 564 13929
Monteleone di Spoleto PG 19 599 14528

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km SE of Foligno (57155 inhabitants)
42 Km NE of Terni (111501 inhabitants)
57 Km W of Teramo (54892 inhabitants)
59 Km NW of L'Aquila (69753 inhabitants)
63 Km SE of Perugia (166134 inhabitants)
88 Km NE of Viterbo (67173 inhabitants)
93 Km N of Guidonia Montecelio (88673 inhabitants)
96 Km N of Tivoli (56533 inhabitants)
96 Km W of Montesilvano (53738 inhabitants)
98 Km SW of Ancona (100861 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 2021-09-11
16:42:35		 42.8083 13.041 11 2022-03-30
13:04:08		 Bollettino Sismico Italiano INGV 96034621
Reviewed
Rev100 		ML 1.7 2021-09-11
16:42:35		 42.8078 13.0483 11 2021-09-11
16:50:17		 Sala Sismica INGV-Roma 95309641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-11 16:42:35 ± 0.04
Latitude 42.8083 ± 0.0018
Longitude 13.0410 ± 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 96034621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 290
Semi-minor axis of confidence ellipse (meter) 89
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 289
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) 42
Number of associated phases, regardless of their use for origin computation 44
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) 0.59085
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 56
Type of magnitude ML
Reference to an origin 95309641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-11 16:50:17

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 60
Type of magnitude ML
Reference to an origin 96034621
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-07 15:19:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VIVA.HHZ. 2021-09-11T16:43:07.51 3.0 undecidable manual S -3.95 0
IV.PTRJ.HNZ. 2021-09-11T16:43:04.95 3.0 negative manual Pn -0.77 0
IV.CESX.HHZ. 2021-09-11T16:42:49.47 0.6 undecidable manual S 239 43.1235 50 0.14 46
IV.GUMA.HHZ. 2021-09-11T16:42:48.12 0.3 undecidable manual S 40 36.9297 50 0.44 65
IV.RM33.EHZ. 2021-09-11T16:42:47.40 0.1 undecidable manual S 157 36.1416 50 -0.05 94
IV.MML1.EHZ. 2021-09-11T16:42:46.82 0.6 undecidable manual S 351 34.3434 50 -0.14 46
IV.MURB.HHZ. 2021-09-11T16:42:46.86 0.6 undecidable manual P 320 65.5899 50 0.04 45
IV.SMA1.EHZ. 2021-09-11T16:42:46.09 0.6 undecidable manual S 129 31.0467 50 -0.01 48
IV.CSP1.EHZ. 2021-09-11T16:42:46.93 0.3 undecidable manual S 23 34.1436 50 0.01 71
IV.ARRO.EHZ. 2021-09-11T16:42:46.98 0.6 undecidable manual S 222 33.9438 50 0.12 47
IV.MTRA.EHZ. 2021-09-11T16:42:45.35 0.6 undecidable manual S 101 29.5482 50 -0.33 45
IV.MNTT.EHZ. 2021-09-11T16:42:45.79 0.3 undecidable manual P 58 53.1024 50 0.89 53
IV.EL6.EHZ. 2021-09-11T16:42:45.58 0.3 undecidable manual P 5 57.9975 50 -0.08 68
IV.MMO1.EHZ. 2021-09-11T16:42:44.26 0.6 undecidable manual S 66 25.3524 50 -0.31 45
IV.SNTG.HHZ. 2021-09-11T16:42:44.33 0.3 undecidable manual P 351 50.2164 50 -0.12 68
IV.FDMO.HHE. 2021-09-11T16:42:44.35 0.6 undecidable manual S 8 25.5522 50 -0.28 46
IV.ATCC.EHZ. 2021-09-11T16:42:44.84 0.3 undecidable manual P 322 53.0025 50 -0.04 69
IV.CESI.HHZ. 2021-09-11T16:42:44.30 0.6 undecidable manual S 333 24.4533 50 -0.03 48
IV.TERO.HHZ. 2021-09-11T16:42:44.35 0.3 undecidable manual P 114 50.3163 50 -0.11 68
IV.LNSS.HHZ. 2021-09-11T16:42:43.70 0.6 undecidable manual S 180 22.755 50 -0.19 47
IV.SAP2.EHZ. 2021-09-11T16:42:43.71 0.3 undecidable manual P 42 43.2234 50 0.33 66
IV.MF5.EHZ. 2021-09-11T16:42:43.11 0.1 undecidable manual P 60 39.4272 50 0.32 89
IV.CESX.HHZ. 2021-09-11T16:42:43.63 0.3 undecidable manual P 239 43.1235 50 0.26 67
IV.GUMA.HHZ. 2021-09-11T16:42:42.62 0.1 undecidable manual P 40 36.9297 50 0.21 91
IV.FEMA.HNZ. 2021-09-11T16:42:42.20 0.6 undecidable manual S 2 17.0718 122 0.02 49
IV.GAVE.EHZ. 2021-09-11T16:42:42.40 0.6 undecidable manual S 223 17.5713 121 0.07 48
IV.RM33.EHZ. 2021-09-11T16:42:42.18 0.3 undecidable manual P 157 36.1416 50 -0.1 70
IV.MC2.EHZ. 2021-09-11T16:42:42.10 0.6 undecidable manual S 46 16.5723 122 0.06 49
IV.MOMA.HHZ. 2021-09-11T16:42:42.64 0.1 undecidable manual P 269 38.3283 50 0.02 94
IV.ASSB.HHZ. 2021-09-11T16:42:42.87 0.3 undecidable manual P 310 40.5261 50 -0.08 70
IV.CSP1.EHZ. 2021-09-11T16:42:41.86 0.1 positive manual P 23 34.1436 50 -0.12 93
IV.ARRO.EHZ. 2021-09-11T16:42:41.84 0.1 undecidable manual P 222 33.9438 50 -0.1 94
IV.MML1.EHZ. 2021-09-11T16:42:41.83 0.1 undecidable manual P 351 34.3434 50 -0.17 92
IV.SMA1.EHZ. 2021-09-11T16:42:41.59 0.3 undecidable manual P 129 31.0467 50 0.09 71
IV.MTRA.EHZ. 2021-09-11T16:42:41.20 0.1 undecidable manual P 101 29.5482 50 -0.06 95
IV.CESI.HHZ. 2021-09-11T16:42:40.39 0.1 undecidable manual P 333 24.4533 50 -0.09 95
IV.LNSS.HHZ. 2021-09-11T16:42:40.18 0.1 undecidable manual P 180 22.755 50 -0.05 96
IV.MMO1.EHZ. 2021-09-11T16:42:40.44 0.1 undecidable manual P 66 25.3524 50 -0.18 94
IV.FDMO.HHE. 2021-09-11T16:42:40.46 0.1 undecidable manual P 8 25.5522 50 -0.2 93
IV.MC2.EHZ. 2021-09-11T16:42:39.28 0.1 positive manual P 46 16.5723 122 0.12 96
IV.FEMA.HNZ. 2021-09-11T16:42:39.24 0.3 undecidable manual P 2 17.0718 122 0 74
IV.NRCA.HNZ. 2021-09-11T16:42:39.20 0.3 undecidable manual S 65 6.5934 148 -0.33 70
IV.GAVE.EHZ. 2021-09-11T16:42:39.45 0.1 positive manual P 223 17.5713 121 0.12 96
IV.NRCA.HNZ. 2021-09-11T16:42:37.70 0.1 negative manual P 65 6.5934 148 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:2.6 0.005725 0.12 AML other m 2021-09-11T16:42:39.21
IV.NRCA.HNN. ML:2.5 0.0050536715 0.128 AML other m 2021-09-11T16:42:39.21
IV.NRCA.HNE. ML:2.4 0.0039299999999999995 0.14 AML other m 2021-09-11T16:42:39.28
IV.NRCA.HHE. ML:2.4 0.00397 0.14 AML other m 2021-09-11T16:42:39.28
IV.GAVE.EHE. ML:1.9 0.0006324344 1.8464 AML other m 2021-09-11T16:42:42.06
IV.GAVE.HNE. ML:1.9 0.0006100921 0.1152 AML other m 2021-09-11T16:42:43.33
IV.RM33.HNN. ML:1.5 0.0001227183 0.512 AML other m 2021-09-11T16:42:43.67
IV.GAVE.HNN. ML:1.5 0.000265631 0.1408 AML other m 2021-09-11T16:42:43.40
IV.GAVE.EHN. ML:2.0 0.0009315419999999999 0.1536 AML other m 2021-09-11T16:42:43.40
IV.LNSS.HNE. ML:1.8 0.0004409853 1.8592 AML other m 2021-09-11T16:42:43.96
IV.LNSS.HHE. ML:1.9 0.00047467865 1.8592 AML other m 2021-09-11T16:42:43.96
IV.LNSS.HHN. ML:2.1 0.0007635000000000001 0.18 AML other m 2021-09-11T16:42:44.24
IV.LNSS.HNN. ML:2.0 0.000694204 0.1792 AML other m 2021-09-11T16:42:44.24
IV.CESI.HHN. ML:1.8 0.00034399999999999996 0.22 AML other m 2021-09-11T16:42:44.48
IV.CESI.HNN. ML:1.8 0.00034043020000000003 0.2432 AML other m 2021-09-11T16:42:44.36
IV.CESI.HHE. ML:1.5 0.00018828505000000002 0.1152 AML other m 2021-09-11T16:42:45.20
IV.CESI.HNE. ML:1.4 0.00015629175 0.1024 AML other m 2021-09-11T16:42:45.20
IV.MTRA.HNE. ML:1.7 0.00024201905000000002 0.256 AML other m 2021-09-11T16:42:45.74
IV.MTRA.EHE. ML:1.8 0.00027250945 0.256 AML other m 2021-09-11T16:42:45.75
IV.MTRA.HNN. ML:1.8 0.00028826675 1.7312 AML other m 2021-09-11T16:42:45.89
IV.MTRA.EHN. ML:1.8 0.0002912013 0.2688 AML other m 2021-09-11T16:42:46.67
IV.SMA1.EHN. ML:1.6 0.000183 0.28 AML other m 2021-09-11T16:42:47.12
IV.MML1.HNN. ML:1.5 0.00013939265000000001 0.192 AML other m 2021-09-11T16:42:47.26
IV.MML1.EHN. ML:1.5 0.00012712935 0.1536 AML other m 2021-09-11T16:42:47.28
IV.MML1.HNE. ML:1.6 0.00014509792 0.1664 AML other m 2021-09-11T16:42:47.37
IV.MML1.EHE. ML:1.5 0.00014150000000000002 0.16 AML other m 2021-09-11T16:42:47.37
IV.CSP1.EHE. ML:1.8 0.00027904760000000003 0.1536 AML other m 2021-09-11T16:42:47.55
IV.RM33.EHN. ML:1.3 0.000083291125 0.1024 AML other m 2021-09-11T16:42:48.25
IV.SMA1.EHE. ML:1.5 0.00015681425 0.3072 AML other m 2021-09-11T16:42:48.79
IV.CSP1.EHN. ML:2.0 0.00042471465 0.2944 AML other m 2021-09-11T16:42:48.52
IV.GUMA.HNE. ML:2.0 0.00038174039999999996 0.2944 AML other m 2021-09-11T16:42:48.54
IV.ARRO.EHE. ML:1.5 0.000122 0.18 AML other m 2021-09-11T16:42:48.70
IV.RM33.EHE. ML:1.3 0.00007993431 0.1408 AML other m 2021-09-11T16:42:48.78
IV.ARRO.EHN. ML:1.4 0.00011275655 0.1408 AML other m 2021-09-11T16:42:48.87
IV.MOMA.HNE. ML:1.8 0.00020888000000000002 0.1792 AML other m 2021-09-11T16:42:49.23
IV.MOMA.HHE. ML:1.7 0.0001945444 0.192 AML other m 2021-09-11T16:42:49.32
IV.GUMA.HHN. ML:1.9 0.0003035628 0.4352 AML other m 2021-09-11T16:42:49.47
IV.MF5.EHE. ML:1.6 0.00013323275 0.192 AML other m 2021-09-11T16:42:49.70
IV.MOMA.HHN. ML:1.6 0.00013350000000000002 1.76 AML other m 2021-09-11T16:42:49.99
IV.MOMA.HNN. ML:1.7 0.00016361651999999998 1.7568 AML other m 2021-09-11T16:42:49.99
IV.MF5.EHN. ML:1.5 0.0001189121 0.1792 AML other m 2021-09-11T16:42:50.19
IV.ASSB.HHE. ML:1.5 0.0001079 0.1 AML other m 2021-09-11T16:42:50.72
IV.SNTG.HNN. ML:1.5 0.000088331625 0.7808 AML other m 2021-09-11T16:42:51.39
IV.GUMA.HHE. ML:1.9 0.00030300000000000005 0.44 AML other m 2021-09-11T16:42:51.11
IV.ASSB.HHN. ML:1.4 0.000093005745 0.1408 AML other m 2021-09-11T16:42:51.94
IV.SNTG.HHE. ML:1.2 0.000040749999999999994 0.12 AML other m 2021-09-11T16:42:52.43
IV.SNTG.HHN. ML:1.3 0.000052449999999999994 0.1 AML other m 2021-09-11T16:42:53.37
IV.ATCC.EHN. ML:1.6 0.00010059999999999999 0.26 AML other m 2021-09-11T16:42:53.96
IV.GUMA.HNN. ML:2.0 0.00035202245 0.4608 AML other m 2021-09-11T16:42:54.30
IV.ATCC.EHE. ML:1.4 0.00006384525500000001 0.1408 AML other m 2021-09-11T16:42:54.29
IV.MNTT.EHE. ML:2.1 0.0002895 0.44 AML other m 2021-09-11T16:42:54.79
IV.EL6.EHN. ML:1.5 0.00006408764 0.1664 AML other m 2021-09-11T16:42:54.75
IV.EL6.EHE. ML:1.6 0.00009471378 1.8592 AML other m 2021-09-11T16:42:54.06
IV.MNTT.EHN. ML:2.0 0.00025204825 0.2816 AML other m 2021-09-11T16:42:55.60
IV.RM33.HNE. ML:1.4 0.00010275527500000001 1.4752 AML other m 2021-09-11T16:42:55.01
IV.MURB.HHE. ML:1.8 0.00010425000000000001 0.26 AML other m 2021-09-11T16:43:00.41
IV.MURB.HNE. ML:1.8 0.00011293397 0.256 AML other m 2021-09-11T16:43:00.42
IV.MURB.HHN. ML:1.7 0.0000864 0.32 AML other m 2021-09-11T16:43:03.65
IV.MURB.HNN. ML:1.7 0.00009804096500000001 0.2944 AML other m 2021-09-11T16:43:03.95
IV.SNTG.HNE. ML:1.6 0.00011517678 1.1552 AML other m 2021-09-11T16:43:05.76
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