Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 01-11-2021 and time 13:21:12 (Italy) in region 2 km N Norcia (PG)

A magnitude ML 1.2 earthquake occured in region: 2 km N Norcia (PG), on

  • 01-11-2021 12:21:12 (UTC)
  • 01-11-2021 13:21:12 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8070, 13.1000 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Preci PG 9 724 5681
Castelsantangelo sul Nera MC 11 281 5962
Cascia PG 12 3217 9179
Visso MC 14 1107 10286
Cerreto di Spoleto PG 15 1075 11361
Ussita MC 16 444 11805
Arquata del Tronto AP 17 1178 12983
Sellano PG 17 1079 14062
Poggiodomo PG 17 117 14179
Accumoli RI 17 667 14846
Montegallo AP 20 523 15369
Vallo di Nera PG 20 364 15733

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
92 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
99 Km W of Pescara (121014 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
Reviewed
Rev100 		ML 1.2 2021-11-01
12:21:12		 42.8073 13.0995 11 2021-11-01
12:30:35		 Sala Sismica INGV-Roma 97142081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-01 12:21:12 ± 0.04
Latitude 42.8073 ± 0.0027
Longitude 13.0995 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97142081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 440
Semi-minor axis of confidence ellipse (meter) 236
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 107
Circular confidence region, given by single value of horizontal uncertainty (meter) 440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.31926
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 97142081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-01 12:30:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MGAB.HHZ. 2021-11-01T12:21:40.29 3.0 undecidable manual S 4.81 0
IV.PIEI.HHZ. 2021-11-01T12:21:38.25 3.0 undecidable manual S -0.13 0
IV.CSP1.EHZ. 2021-11-01T12:21:24.28 0.3 undecidable manual S 15 32.745 50 0.02 73
IV.CESI.HHZ. 2021-11-01T12:21:22.82 0.3 undecidable manual S 324 27.0507 50 0.07 73
IV.FDMO.HHZ. 2021-11-01T12:21:22.12 0.3 undecidable manual S 358 25.4523 50 -0.2 72
IV.GAVE.EHZ. 2021-11-01T12:21:21.38 0.3 undecidable manual S 233 21.0678 117 0.23 72
IV.TERO.HHZ. 2021-11-01T12:21:21.30 3.0 undecidable manual P 0.03 0
IV.LNSS.HHZ. 2021-11-01T12:21:21.70 0.3 undecidable manual S 192 23.1546 50 -0.02 75
IV.MF5.EHZ. 2021-11-01T12:21:20.21 0.1 undecidable manual P 56 35.4423 50 0.3 92
IV.RM33.EHZ. 2021-11-01T12:21:19.78 0.1 undecidable manual P 164 34.4433 50 0.03 97
IV.CSP1.EHZ. 2021-11-01T12:21:19.39 0.1 undecidable manual P 15 32.745 50 -0.1 96
IV.MC2.EHZ. 2021-11-01T12:21:19.18 0.3 undecidable manual S 32 13.6752 128 0.21 73
IV.MTRA.EHZ. 2021-11-01T12:21:18.21 3.0 undecidable manual P -0.47 0
IV.CESI.HHZ. 2021-11-01T12:21:18.64 0.1 undecidable manual P 324 27.0507 50 0.03 99
IV.FDMO.HHZ. 2021-11-01T12:21:18.29 0.1 undecidable manual P 358 25.4523 50 -0.08 98
IV.SMA1.EHZ. 2021-11-01T12:21:18.57 0.1 undecidable manual P 136 27.4503 50 -0.11 97
IV.GAVE.EHZ. 2021-11-01T12:21:17.68 0.1 undecidable manual P 233 21.0678 117 -0.01 100
IV.LNSS.HHZ. 2021-11-01T12:21:17.93 0.1 undecidable manual P 192 23.1546 50 -0.09 98
IV.MC2.EHZ. 2021-11-01T12:21:16.55 0.1 undecidable manual P 32 13.6752 128 0.12 99
IV.NRCA.HHZ. 2021-11-01T12:21:16.53 0.1 undecidable manual S 22 3.0969 163 -0.28 98
IV.NRCA.HHZ. 2021-11-01T12:21:15.12 0.6 undecidable manual P 22 3.0969 163 -0.06 51
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:0.9 0.000060588465 0.2368 AML other m 2021-11-01T12:21:22.16
IV.LNSS.HHN. ML:0.9 0.0000537 0.12 AML other m 2021-11-01T12:21:22.41
IV.LNSS.HHE. ML:1.1 0.0000771 0.14 AML other m 2021-11-01T12:21:22.34
IV.GAVE.EHE. ML:1.0 0.00006714321 0.1408 AML other m 2021-11-01T12:21:21.86
IV.TERO.HHN. ML:0.7 0.000014591856999999999 0.0768 AML other m 2021-11-01T12:21:28.16
IV.TERO.HHE. ML:1.8 0.00017977914 0.2624 AML other m 2021-11-01T12:21:42.29
IV.GAVE.HNE. ML:1.3 0.00012610365 0.7296 AML other m 2021-11-01T12:21:28.01
IV.GAVE.HNN. ML:1.4 0.0001824677 0.9216 AML other m 2021-11-01T12:21:31.16
IV.LNSS.HNE. ML:1.3 0.0001173196 0.7808 AML other m 2021-11-01T12:21:20.68
IV.LNSS.HNN. ML:1.4 0.00016244156999999998 0.9856 AML other m 2021-11-01T12:21:32.36
IV.MTRA.EHE. ML:1.1 0.00007739889999999999 0.3392 AML other m 2021-11-01T12:21:24.74
IV.MTRA.EHN. ML:1.0 0.00006190495 0.4608 AML other m 2021-11-01T12:21:22.22
IV.MTRA.HNE. ML:1.4 0.00013297365 0.4928 AML other m 2021-11-01T12:21:19.56
IV.MTRA.HNN. ML:1.2 0.000106842829 0.5632 AML other m 2021-11-01T12:21:20.77
IV.CESI.HHE. ML:0.6 0.00002007583 0.1856 AML other m 2021-11-01T12:21:23.06
IV.CESI.HHN. ML:0.8 0.000028728499999999998 0.1216 AML other m 2021-11-01T12:21:23.95
IV.CESI.HNE. ML:1.3 0.00010004417999999999 0.6464 AML other m 2021-11-01T12:21:33.27
IV.CESI.HNN. ML:1.4 0.00013269095 0.7296 AML other m 2021-11-01T12:21:27.06
IV.CSP1.EHE. ML:1.1 0.000055405640000000006 0.7808 AML other m 2021-11-01T12:21:21.92
IV.CSP1.EHN. ML:1.1 0.00005159127 0.224 AML other m 2021-11-01T12:21:27.25
IV.RM33.HNE. ML:1.5 0.000125993955 0.8768 AML other m 2021-11-01T12:21:30.52
IV.RM33.HNN. ML:1.8 0.00025894915 1.408 AML other m 2021-11-01T12:21:32.48
IV.RM33.EHE. ML:0.7 0.00001858872 0.1408 AML other m 2021-11-01T12:21:25.88
IV.RM33.EHN. ML:0.4 0.000012421045 0.7744 AML other m 2021-11-01T12:21:39.72
IV.MF5.EHE. ML:1.2 0.000058547194999999994 1.2416 AML other m 2021-11-01T12:21:29.39
IV.MF5.EHN. ML:1.0 0.000042417145 1.7344 AML other m 2021-11-01T12:21:19.75
IV.TERO.HNE. ML:1.6 0.000119626425 1.088 AML other m 2021-11-01T12:21:22.04
IV.TERO.HNN. ML:1.8 0.0001626523 0.672 AML other m 2021-11-01T12:21:39.08
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