Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 24-11-2021 and time 21:45:08 (UTC) in region 6 km E Norcia (PG)

A magnitude ML 1.2 earthquake occured in region: 6 km E Norcia (PG), on

  • 24-11-2021 21:45:08 (UTC)
  • 24-11-2021 22:45:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8180, 13.1530 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 6 4957 4957
Castelsantangelo sul Nera MC 9 281 5238
Preci PG 12 724 5962
Arquata del Tronto AP 13 1178 7140
Visso MC 14 1107 8247
Ussita MC 14 444 8691
Montegallo AP 15 523 9214
Accumoli RI 16 667 9881
Cascia PG 16 3217 13098
Montemonaco AP 17 604 13702
Cerreto di Spoleto PG 19 1075 14777

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
48 Km W of Teramo (54892 inhabitants)
50 Km NE of Terni (111501 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
95 Km W of Pescara (121014 inhabitants)
97 Km E of Viterbo (67173 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km NW of Chieti (51815 inhabitants)
99 Km NE of Tivoli (56533 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 1.2 2021-11-24
21:45:08		 42.8178 13.1532 10 2022-03-30
13:04:18		 Bollettino Sismico Italiano INGV 97787351
Reviewed
Rev100 		ML 1.2 2021-11-24
21:45:08		 42.8197 13.1432 10 2021-11-24
21:51:08		 Sala Sismica INGV-Roma 97762661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-24 21:45:08 ± 0.06
Latitude 42.8178 ± 0.0036
Longitude 13.1532 ± 0.0061
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 97787351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 490
Semi-minor axis of confidence ellipse (meter) 363
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 65
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 62
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.03238
Epicentral distance of station farthest from the epicenter (degree) 0.40559
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 97787351
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-11 10:59:44

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 97762661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-24 21:51:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RM33.EHZ. 2021-11-24T21:45:20.08 0.6 undecidable manual S 172 34.6431 50 0 48
IV.MML1.EHZ. 2021-11-24T21:45:20.29 0.3 undecidable manual S 336 35.9418 50 -0.14 70
IV.MF5.EHZ. 2021-11-24T21:45:19.84 0.6 undecidable manual S 53 31.2465 50 0.67 41
IV.CSP1.EHZ. 2021-11-24T21:45:18.68 0.6 undecidable manual S 8 30.6471 50 -0.34 45
IV.CESI.HHZ. 2021-11-24T21:45:18.49 0.6 undecidable manual S 316 28.9488 50 -0.06 48
IV.GAVE.HNZ. 2021-11-24T21:45:17.65 0.6 undecidable manual S 237 25.2525 50 0.07 48
IV.LNSS.HHZ. 2021-11-24T21:45:17.51 0.6 undecidable manual S 201 25.5522 50 -0.15 47
IV.SMA1.EHZ. 2021-11-24T21:45:17.36 0.6 undecidable manual S 144 25.5522 50 -0.29 46
IV.MNTT.EHZ. 2021-11-24T21:45:17.42 0.3 undecidable manual P 53 45.0216 50 0.77 57
IT.MTCL.HGZ. 2021-11-24T21:45:16.55 0.6 undecidable manual S 327 23.1546 114 -0.43 45
IV.FDMO.HHZ. 2021-11-24T21:45:16.93 0.6 undecidable manual S 348 24.8529 50 -0.53 44
IV.MML1.EHZ. 2021-11-24T21:45:15.23 0.3 undecidable manual P 336 35.9418 50 -0.03 72
IV.FEMA.HNE. 2021-11-24T21:45:15.44 0.6 undecidable manual S 332 18.0708 120 0.04 49
IV.MTRA.HNZ. 2021-11-24T21:45:15.79 0.6 undecidable manual S 109 20.9679 116 -0.49 44
IV.CESI.HHZ. 2021-11-24T21:45:14.15 0.1 positive manual P 316 28.9488 50 -0.03 97
IV.MMO1.EHZ. 2021-11-24T21:45:14.70 0.6 undecidable manual S 57 16.7721 121 -0.3 47
IV.CSP1.EHZ. 2021-11-24T21:45:14.25 0.1 undecidable manual P 8 30.6471 50 -0.19 93
IV.RM33.EHZ. 2021-11-24T21:45:14.78 0.3 undecidable manual P 172 34.6431 50 -0.27 68
IV.GAVE.HNZ. 2021-11-24T21:45:14.03 0.3 undecidable manual P 237 25.2525 50 0.42 67
IV.MF5.EHZ. 2021-11-24T21:45:14.89 0.1 undecidable manual P 53 31.2465 50 0.36 90
IV.MC2.EHZ. 2021-11-24T21:45:13.53 0.3 undecidable manual S 16 10.7781 134 0.19 72
IV.FDMO.HHZ. 2021-11-24T21:45:13.29 0.1 undecidable manual P 348 24.8529 50 -0.25 93
IT.MTCL.HGZ. 2021-11-24T21:45:13.08 0.3 undecidable manual P 327 23.1546 114 -0.19 71
IV.FEMA.HNE. 2021-11-24T21:45:13.03 0.3 undecidable manual P 332 18.0708 120 0.68 62
IV.LNSS.HHZ. 2021-11-24T21:45:13.68 0.1 undecidable manual P 201 25.5522 50 0.03 97
IV.SMA1.EHZ. 2021-11-24T21:45:13.83 0.3 undecidable manual P 144 25.5522 50 0.18 71
IV.MTRA.HNZ. 2021-11-24T21:45:12.66 0.1 undecidable manual P 109 20.9679 116 -0.2 94
IV.MC2.EHZ. 2021-11-24T21:45:11.36 0.1 undecidable manual P 16 10.7781 134 0.19 96
IV.MMO1.EHZ. 2021-11-24T21:45:11.97 0.1 undecidable manual P 57 16.7721 121 -0.16 96
IV.NRCA.HNZ. 2021-11-24T21:45:11.88 0.1 undecidable manual S 299 3.5964 161 -0.07 100
IV.NRCA.HNZ. 2021-11-24T21:45:10.54 0.1 positive manual P 299 3.5964 161 0.18 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.7 0.0009215 1.68 AML other m 2021-11-24T21:45:11.06
IV.NRCA.HNE. ML:1.7 0.000839 1.66 AML other m 2021-11-24T21:45:11.07
IV.NRCA.HHN. ML:1.9 0.001295 0.1 AML other m 2021-11-24T21:45:12.49
IV.NRCA.HNN. ML:1.9 0.0012855000000000002 0.08 AML other m 2021-11-24T21:45:12.49
IV.MMO1.EHE. ML:1.0 0.0000781 0.26 AML other m 2021-11-24T21:45:15.13
IV.MMO1.EHN. ML:1.0 0.00007755 0.66 AML other m 2021-11-24T21:45:15.92
IV.FDMO.HHE. ML:0.7 0.000028049999999999997 0.6 AML other m 2021-11-24T21:45:17.50
IV.FDMO.HHN. ML:0.7 0.00002775 1.02 AML other m 2021-11-24T21:45:17.80
IV.LNSS.HHN. ML:1.3 0.00010765 0.66 AML other m 2021-11-24T21:45:17.88
IV.LNSS.HHE. ML:1.3 0.00010695 0.4 AML other m 2021-11-24T21:45:18.20
IV.CESI.HHE. ML:0.8 0.00003685 0.4 AML other m 2021-11-24T21:45:18.79
IV.CESI.HHN. ML:1.1 0.00005865 0.36 AML other m 2021-11-24T21:45:18.99
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