Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 05-09-2021 and time 22:08:45 (UTC) in region 3 km E Norcia (PG)

A magnitude ML 0.7 earthquake occured in region: 3 km E Norcia (PG), on

  • 05-09-2021 22:08:45 (UTC)
  • 06-09-2021 00:08:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7890, 13.1320 at 12 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 3 4957 4957
Castelsantangelo sul Nera MC 12 281 5238
Cascia PG 12 3217 8455
Preci PG 13 724 9179
Arquata del Tronto AP 14 1178 10357
Accumoli RI 14 667 11024
Visso MC 16 1107 12131
Ussita MC 17 444 12575
Montegallo AP 18 523 13098
Cerreto di Spoleto PG 18 1075 14173
Poggiodomo PG 18 117 14290
Cittareale RI 19 482 14772

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
49 Km W of Teramo (54892 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
70 Km SE of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km W of Pescara (121014 inhabitants)
96 Km N of Tivoli (56533 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
98 Km NW 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 0.7 2021-09-05
22:08:45		 42.7888 13.1323 12 2022-03-30
13:04:06		 Bollettino Sismico Italiano INGV 95461341
Reviewed
Rev100 		ML 0.7 2021-09-05
22:08:44		 42.7883 13.1262 13 2021-09-05
22:25:26		 Sala Sismica INGV-Roma 95087321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-05 22:08:45 ± 0.04
Latitude 42.7888 ± 0.0018
Longitude 13.1323 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95461341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 269
Semi-minor axis of confidence ellipse (meter) 72
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 244
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) 55
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.04676
Epicentral distance of station farthest from the epicenter (degree) 0.42988
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 95087321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-05 22:25:26

ML:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 95461341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-15 11:50:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HNZ. 2021-09-05T22:09:00.00 0.3 undecidable manual S 272 45.8208 92 0.31 67
IV.ASSB.HHN. 2021-09-05T22:09:00.36 0.6 undecidable manual S 306 47.7189 92 0.17 46
IV.CESI.HHE. 2021-09-05T22:08:55.43 0.3 undecidable manual S 322 30.2475 94 -0.12 72
IV.FDMO.HHZ. 2021-09-05T22:08:54.72 0.3 undecidable manual S 352 27.75 95 -0.15 71
IV.MTRA.EHZ. 2021-09-05T22:08:53.60 0.3 undecidable manual S 99 21.7671 98 0.3 71
IV.LNSS.HNZ. 2021-09-05T22:08:53.28 0.3 undecidable manual S 200 21.9669 98 -0.06 74
IV.SMA1.EHZ. 2021-09-05T22:08:53.61 0.3 undecidable manual S 137 24.1536 97 -0.31 69
IV.T1299.HNZ. 2021-09-05T22:08:53.30 0.6 undecidable manual S 145 21.0678 99 0.19 48
IV.MOMA.HNZ. 2021-09-05T22:08:53.56 0.1 undecidable manual P 272 45.8208 92 0.08 93
IV.GAVE.EHZ. 2021-09-05T22:08:53.42 0.3 undecidable manual S 241 22.1556 98 0.02 74
IT.MTCL.HGZ. 2021-09-05T22:08:53.98 0.1 undecidable manual S 335 25.1526 96 -0.22 94
IV.ASSB.HHN. 2021-09-05T22:08:53.93 0.3 undecidable manual P 306 47.7189 92 0.16 69
IV.MMO1.EHZ. 2021-09-05T22:08:52.84 0.6 undecidable manual S 52 19.9689 100 0.02 50
IV.FEMA.HNZ. 2021-09-05T22:08:52.84 0.6 undecidable manual S 341 20.3685 100 -0.08 49
IV.ARRO.EHZ. 2021-09-05T22:08:52.35 0.3 undecidable manual P 232 37.9287 93 0.09 71
IV.MC2.EHZ. 2021-09-05T22:08:51.75 0.3 undecidable manual S 19 14.3745 112 0.38 70
IV.CESI.HHE. 2021-09-05T22:08:51.11 0.1 undecidable manual P 322 30.2475 94 0.02 98
IV.SMA1.EHZ. 2021-09-05T22:08:50.01 0.3 undecidable manual P 137 24.1536 97 -0.14 72
IV.FDMO.HHZ. 2021-09-05T22:08:50.62 0.3 undecidable manual P 352 27.75 95 -0.08 72
IT.MTCL.HGZ. 2021-09-05T22:08:50.52 0.3 undecidable manual P 335 25.1526 96 0.22 71
IV.T1299.HNZ. 2021-09-05T22:08:49.85 0.1 undecidable manual P 145 21.0678 99 0.17 96
IV.GAVE.EHZ. 2021-09-05T22:08:49.50 0.3 undecidable manual P 241 22.1556 98 -0.35 70
IV.MMO1.EHZ. 2021-09-05T22:08:49.52 0.3 undecidable manual P 52 19.9689 100 0 74
IV.FEMA.HNZ. 2021-09-05T22:08:49.42 0.3 undecidable manual P 341 20.3685 100 -0.15 72
IV.NRCA.HHZ. 2021-09-05T22:08:49.36 0.3 undecidable manual S 343 5.1948 151 -0.17 74
IV.MTRA.EHZ. 2021-09-05T22:08:49.70 0.3 undecidable manual P 99 21.7671 98 -0.09 73
IV.LNSS.HNZ. 2021-09-05T22:08:49.81 0.3 undecidable manual P 200 21.9669 98 0 74
IV.MC2.EHZ. 2021-09-05T22:08:48.46 0.3 undecidable manual P 19 14.3745 112 -0.22 72
IV.NRCA.HHZ. 2021-09-05T22:08:47.71 0.1 undecidable manual P 343 5.1948 151 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.1 0.00018449999999999999 1 AML other m 2021-09-05T22:08:49.45
IV.NRCA.HHN. ML:0.9 0.00010495 0.7 AML other m 2021-09-05T22:08:49.51
IV.GAVE.EHN. ML:0.7 0.000031100000000000004 0.2 AML other m 2021-09-05T22:08:53.79
IV.GAVE.EHE. ML:0.7 0.000031 0.42 AML other m 2021-09-05T22:08:55.36
IV.FDMO.HHN. ML:0.5 0.000015050000000000002 0.16 AML other m 2021-09-05T22:08:55.39
IV.FDMO.HHE. ML:0.3 0.00001215 0.72 AML other m 2021-09-05T22:08:57.40
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