Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 24-11-2021 and time 23:50:12 (UTC) in region 3 km SE Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 3 km SE Norcia (PG), on

  • 24-11-2021 23:50:12 (UTC)
  • 25-11-2021 00:50:12 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7720, 13.1060 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 3 4957 4957
Cascia PG 10 3217 8174
Preci PG 13 724 8898
Castelsantangelo sul Nera MC 14 281 9179
Accumoli RI 15 667 9846
Poggiodomo PG 15 117 9963
Arquata del Tronto AP 16 1178 11141
Cerreto di Spoleto PG 16 1075 12216
Cittareale RI 18 482 12698
Visso MC 18 1107 13805
Monteleone di Spoleto PG 18 599 14404
Ussita MC 19 444 14848
Sellano PG 20 1079 15927
Vallo di Nera PG 20 364 16291

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km SE of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
91 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km N of Tivoli (56533 inhabitants)
97 Km W of Pescara (121014 inhabitants)
99 Km W of Chieti (51815 inhabitants)
100 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 1.0 2021-11-24
23:50:12		 42.7725 13.1058 10 2022-03-30
13:04:23		 Bollettino Sismico Italiano INGV 98854501
Reviewed
Rev100 		ML 1.0 2021-11-24
23:50:13		 42.7773 13.1065 10 2021-11-25
00:10:43		 Sala Sismica INGV-Roma 97768351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-24 23:50:12 ± 0.21
Latitude 42.7725 ± 0.0099
Longitude 13.1058 ± 0.0098
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 98854501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1162
Semi-minor axis of confidence ellipse (meter) 775
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 163
Circular confidence region, given by single value of horizontal uncertainty (meter) 1160.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 276
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32735
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 98854501
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-23 15:28:50

ML:1.0

Field Value
Value 1.0
Uncertainty 0.5
Num. used stations 18
Type of magnitude ML
Reference to an origin 97768351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-25 00:10:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.CANO.HHZ. 2021-11-24T23:51:57.24 3.0 undecidable manual Sn -1.99 0
GU.BURY.HHZ. 2021-11-24T23:51:20.77 3.0 positive manual Pg 9.69 0
IV.MAGA.HHZ. 2021-11-24T23:51:09.09 3.0 undecidable manual Pn 4.12 0
IV.FIR.HHZ. 2021-11-24T23:51:04.35 3.0 undecidable manual Sn -5.11 0
IV.CDRU.HHZ. 2021-11-24T23:51:03.32 3.0 undecidable manual Sn -3.86 0
IV.SNR3.EHZ.02 2021-11-24T23:51:02.39 3.0 undecidable manual S 0
IV.MBAL.EHZ. 2021-11-24T23:51:02.65 3.0 undecidable manual Pn -0.31 0
IV.MCRV.HHZ. 2021-11-24T23:51:01.59 3.0 undecidable manual Sg 0
IV.SNAL.HHZ. 2021-11-24T23:51:00.52 3.0 undecidable manual Sg 2.24 0
IV.MCRV.HHZ. 2021-11-24T23:50:59.42 3.0 undecidable manual P 0
IV.SNR3.EHZ.02 2021-11-24T23:50:59.87 3.0 undecidable manual P 0
IV.PE3.EHZ. 2021-11-24T23:50:54.11 3.0 undecidable manual Sg -1.23 0
OT.OT17.EHZ. 2021-11-24T23:50:50.66 3.0 undecidable manual Sg -0.73 0
IV.MMUR.HNZ. 2021-11-24T23:50:48.77 3.0 undecidable manual Sg 2.13 0
IV.RIBO.EHZ.01 2021-11-24T23:50:36.07 3.0 negative manual Pg 1.73 0
IV.CRTC.HHZ. 2021-11-24T23:50:32.24 3.0 undecidable manual P 0.43 0
IV.CSP1.EHZ. 2021-11-24T23:50:25.36 0.3 undecidable manual S 13 36.3414 50 0.06 73
IV.FDMO.HHZ. 2021-11-24T23:50:23.28 0.3 undecidable manual S 357 29.3484 50 -0.15 72
IV.CESI.HHZ. 2021-11-24T23:50:23.73 0.3 undecidable manual S 328 30.5472 50 -0.02 74
IV.MMO1.EHZ. 2021-11-24T23:50:21.44 0.3 undecidable manual S 52 22.8549 114 -0.22 72
IV.CSP1.EHZ. 2021-11-24T23:50:20.13 0.1 undecidable manual P 13 36.3414 50 0.05 97
IV.MC2.EHZ. 2021-11-24T23:50:20.08 0.1 undecidable manual S 24 16.872 121 0.26 96
IV.CESI.HHZ. 2021-11-24T23:50:19.21 0.1 undecidable manual P 328 30.5472 50 0.02 99
IV.FDMO.HHZ. 2021-11-24T23:50:18.91 0.1 undecidable manual P 357 29.3484 50 -0.1 97
IV.MC2.EHZ. 2021-11-24T23:50:17.12 0.1 undecidable manual P 24 16.872 121 0.2 97
IV.MMO1.EHZ. 2021-11-24T23:50:17.93 0.1 undecidable manual P 52 22.8549 114 -0.06 99
IV.NRCA.HHZ. 2021-11-24T23:50:16.83 0.3 undecidable manual S 6 6.7932 146 -0.42 71
IV.NRCA.HHZ. 2021-11-24T23:50:15.59 0.1 undecidable manual P 6 6.7932 146 0.15 100
IV.RMP.HHZ. 2021-11-24T23:50:13.65 3.0 undecidable manual P -0.25 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:1.2 0.0002641306 0.1408 AML other m 2021-11-24T23:50:16.91
IV.NRCA.HHE. ML:1.3 0.00027449999999999995 0.16 AML other m 2021-11-24T23:50:16.99
IV.NRCA.HHN. ML:1.2 0.000253 0.14 AML other m 2021-11-24T23:50:16.89
IV.MC2.EHE. ML:0.7 0.000046796100000000004 0.32 AML other m 2021-11-24T23:50:20.00
IV.MC2.EHN. ML:0.7 0.00004718560000000001 1.7824 AML other m 2021-11-24T23:50:21.93
IV.FDMO.HHN. ML:0.3 0.0000111349265 0.3072 AML other m 2021-11-24T23:50:23.28
IV.CESI.HHN. ML:0.7 0.000027208980000000002 0.256 AML other m 2021-11-24T23:50:23.76
IV.CESI.HNN. ML:1.6 0.000185259725 0.96 AML other m 2021-11-24T23:50:24.16
IV.CESI.HNE. ML:1.4 0.00012664544999999998 0.6144 AML other m 2021-11-24T23:50:31.69
IV.NRCA.HNN. ML:1.2 0.00024486085000000003 0.6784 AML other m 2021-11-24T23:50:33.50
IV.FDMO.HHE. ML:0.5 0.000013996694500000001 0.7456 AML other m 2021-11-24T23:50:33.59
IV.CSP1.EHN. ML:1.1 0.0000461716997 1.0112 AML other m 2021-11-24T23:50:36.62
IV.CSP1.EHE. ML:1.3 0.000080585265 0.1184 AML other m 2021-11-24T23:50:38.98
IV.CESI.HHE. ML:0.6 0.00001863546 0.4768 AML other m 2021-11-24T23:50:42.93
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