Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 27-11-2021 and time 20:30:29 (UTC) in region 4 km N Norcia (PG)

A magnitude ML 1.5 earthquake occured in region: 4 km N Norcia (PG), on

  • 27-11-2021 20:30:29 (UTC)
  • 27-11-2021 21:30:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8290, 13.1080 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 4 4957 4957
Preci PG 8 724 5681
Castelsantangelo sul Nera MC 8 281 5962
Visso MC 12 1107 7069
Ussita MC 13 444 7513
Cascia PG 14 3217 10730
Cerreto di Spoleto PG 16 1075 11805
Sellano PG 16 1079 12884
Arquata del Tronto AP 17 1178 14062
Montegallo AP 19 523 14585
Accumoli RI 19 667 15252
Poggiodomo PG 19 117 15369
Montemonaco AP 20 604 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
58 Km NW of L'Aquila (69753 inhabitants)
66 Km E of Perugia (166134 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km W of Pescara (121014 inhabitants)
99 Km N 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 1.5 2021-11-27
20:30:29		 42.8287 13.1078 11 2022-03-30
13:04:31		 Bollettino Sismico Italiano INGV 99940061
Reviewed
Rev100 		ML 1.6 2021-11-27
20:30:29		 42.8278 13.1027 10 2021-11-27
20:37:00		 Sala Sismica INGV-Roma 97879351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-27 20:30:29 ± 0.05
Latitude 42.8287 ± 0.0018
Longitude 13.1078 ± 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 99940061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 301
Semi-minor axis of confidence ellipse (meter) 196
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 63
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 74
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 38
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00719
Epicentral distance of station farthest from the epicenter (degree) 0.41818
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 47
Type of magnitude ML
Reference to an origin 99940061
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-19 14:18:49

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 97879351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-27 20:37:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2021-11-27T20:30:44.07 0.3 undecidable manual S 119 46.4202 50 -0.06 71
IV.ASSB.HHZ. 2021-11-27T20:30:43.53 0.3 undecidable manual S 303 43.5231 50 0.18 70
IV.MF5.EHZ. 2021-11-27T20:30:41.45 0.6 undecidable manual S 58 33.6441 50 0.75 40
IV.RM33.EHZ. 2021-11-27T20:30:41.74 0.6 undecidable manual S 166 36.5412 50 0.26 46
IV.MML1.EHZ. 2021-11-27T20:30:40.72 0.6 undecidable manual S 341 33.4443 50 0.05 49
IV.GUMA.HHZ. 2021-11-27T20:30:40.77 0.6 undecidable manual S 35 31.8459 50 0.53 44
IV.PF6.EHN. 2021-11-27T20:30:40.93 0.1 undecidable manual S 12 35.0427 50 -0.15 95
IV.SMA1.EHZ. 2021-11-27T20:30:39.20 0.3 undecidable manual S 140 28.749 50 -0.21 71
IV.CSP1.EHZ. 2021-11-27T20:30:39.71 0.6 undecidable manual S 15 30.2475 50 -0.1 48
IV.LNSS.HHZ. 2021-11-27T20:30:38.47 0.3 undecidable manual S 192 25.6521 50 -0.11 73
IV.CESI.HHZ. 2021-11-27T20:30:38.13 0.6 undecidable manual S 320 25.5522 50 -0.44 45
IV.MTRA.EHZ. 2021-11-27T20:30:38.15 0.6 undecidable manual S 109 24.8529 50 -0.21 48
IV.FDMO.HHZ. 2021-11-27T20:30:37.64 0.1 undecidable manual S 356 23.1546 50 -0.27 95
IV.ASSB.HHZ. 2021-11-27T20:30:37.37 0.3 undecidable manual P 303 43.5231 50 0.01 72
IV.GAVE.EHZ. 2021-11-27T20:30:37.85 0.6 undecidable manual S 229 23.0547 50 -0.04 50
IV.TERO.HHZ. 2021-11-27T20:30:37.63 0.1 undecidable manual P 119 46.4202 50 -0.17 93
IV.MF5.EHZ. 2021-11-27T20:30:36.18 0.3 undecidable manual P 58 33.6441 50 0.35 68
IT.MTCL.HGN. 2021-11-27T20:30:36.81 0.6 undecidable manual S 334 20.3685 117 -0.29 47
IV.RM33.EHZ. 2021-11-27T20:30:36.23 0.3 undecidable manual P 166 36.5412 50 -0.05 73
IV.MMO1.EHZ. 2021-11-27T20:30:36.48 0.1 undecidable manual S 66 19.4694 118 -0.35 94
IV.SMA1.EHZ. 2021-11-27T20:30:35.05 0.1 undecidable manual P 140 28.749 50 -0.03 98
IV.PF6.EHN. 2021-11-27T20:30:35.97 0.1 undecidable manual P 12 35.0427 50 -0.07 97
IV.CSP1.EHZ. 2021-11-27T20:30:35.29 0.1 undecidable manual P 15 30.2475 50 -0.02 98
IV.MML1.EHZ. 2021-11-27T20:30:35.75 0.1 undecidable manual P 341 33.4443 50 -0.06 97
IV.FEMA.HNN. 2021-11-27T20:30:35.65 0.3 undecidable manual S 342 15.5733 124 -0.02 76
IV.GUMA.HHZ. 2021-11-27T20:30:35.85 0.3 undecidable manual P 35 31.8459 50 0.29 70
IV.GAVE.EHZ. 2021-11-27T20:30:34.45 0.1 undecidable manual P 229 23.0547 50 0.25 95
IV.MTRA.EHZ. 2021-11-27T20:30:34.45 0.1 undecidable manual P 109 24.8529 50 -0.02 99
IV.MC2.EHZ. 2021-11-27T20:30:34.68 0.6 undecidable manual S 36 11.2776 133 0.16 49
IV.LNSS.HHZ. 2021-11-27T20:30:34.56 0.1 negative manual P 192 25.6521 50 -0.04 99
IV.CESI.HHZ. 2021-11-27T20:30:34.65 0.1 undecidable manual P 320 25.5522 50 0.06 98
IV.FDMO.HHZ. 2021-11-27T20:30:34.16 0.1 negative manual P 356 23.1546 50 -0.05 99
IV.FEMA.HNN. 2021-11-27T20:30:33.13 0.6 undecidable manual P 342 15.5733 124 0.22 48
IV.MMO1.EHZ. 2021-11-27T20:30:33.55 0.1 positive manual P 66 19.4694 118 -0.04 100
IT.MTCL.HGN. 2021-11-27T20:30:33.72 0.1 undecidable manual P 334 20.3685 117 -0.03 100
IV.NRCA.HNZ. 2021-11-27T20:30:32.59 0.6 undecidable manual S 44 0.7992 176 -0.22 50
IV.MC2.EHZ. 2021-11-27T20:30:32.57 0.1 positive manual P 36 11.2776 133 0.32 96
IV.NRCA.HNZ. 2021-11-27T20:30:31.48 0.3 undecidable manual P 44 0.7992 176 0.21 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.0 0.001685 0.12 AML other m 2021-11-27T20:30:32.79
IV.NRCA.HHE. ML:2.0 0.0018399999999999998 0.12 AML other m 2021-11-27T20:30:32.79
IV.NRCA.HNN. ML:1.9 0.00152 0.12 AML other m 2021-11-27T20:30:32.80
IV.NRCA.HHN. ML:1.9 0.0015 0.14 AML other m 2021-11-27T20:30:32.80
IV.MC2.EHN. ML:1.8 0.00074892585 0.2688 AML other m 2021-11-27T20:30:36.53
IV.MC2.EHE. ML:1.8 0.0007415000000000001 0.32 AML other m 2021-11-27T20:30:36.14
IV.MMO1.EHE. ML:1.2 0.00012032529999999999 0.1024 AML other m 2021-11-27T20:30:36.89
IV.MMO1.EHN. ML:1.3 0.00015830755000000003 0.1408 AML other m 2021-11-27T20:30:37.62
IV.FDMO.HHE. ML:1.2 0.00009547159 0.2176 AML other m 2021-11-27T20:30:39.24
IV.FDMO.HHN. ML:1.2 0.00009460837499999999 0.0896 AML other m 2021-11-27T20:30:38.16
IV.GAVE.EHN. ML:1.7 0.00030649999999999997 0.3 AML other m 2021-11-27T20:30:38.09
IV.MTRA.EHN. ML:1.5 0.0002011278 0.192 AML other m 2021-11-27T20:30:38.99
IV.CESI.HHE. ML:1.5 0.00017199999999999998 0.18 AML other m 2021-11-27T20:30:38.79
IV.CESI.HHN. ML:1.6 0.0002263964 0.256 AML other m 2021-11-27T20:30:38.93
IV.GAVE.EHE. ML:1.7 0.0003485 1.8 AML other m 2021-11-27T20:30:38.02
IV.LNSS.HHE. ML:1.4 0.00015440520000000002 0.1024 AML other m 2021-11-27T20:30:39.33
IV.LNSS.HHN. ML:1.6 0.0002045 0.26 AML other m 2021-11-27T20:30:39.20
IV.MTRA.EHE. ML:1.6 0.00026149999999999996 0.16 AML other m 2021-11-27T20:30:39.23
IV.GUMA.HHE. ML:1.7 0.00020649999999999998 0.18 AML other m 2021-11-27T20:30:40.84
IV.GUMA.HHN. ML:1.4 0.00011840040999999999 0.2688 AML other m 2021-11-27T20:30:41.29
IV.ASSB.HHE. ML:1.4 0.00008510000000000001 0.18 AML other m 2021-11-27T20:30:44.02
IV.ASSB.HHN. ML:1.3 0.000057934860000000004 0.1664 AML other m 2021-11-27T20:30:44.81
IV.MMO1.HNE. ML:2.9 0.0062763775 0.576 AML other m 2021-11-27T20:30:36.65
IV.MMO1.HNN. ML:2.7 0.004186555000000001 0.8064 AML other m 2021-11-27T20:30:36.42
IV.MTRA.HNE. ML:1.6 0.00021951615000000003 0.1536 AML other m 2021-11-27T20:30:39.23
IV.MTRA.HNN. ML:1.6 0.0002331669 0.2048 AML other m 2021-11-27T20:30:38.99
IV.GAVE.HNN. ML:1.5 0.0001992525 0.9344 AML other m 2021-11-27T20:30:38.55
IV.GAVE.HNE. ML:1.8 0.0003682318 0.1792 AML other m 2021-11-27T20:30:39.01
IV.LNSS.HNN. ML:1.6 0.0002040539 0.1792 AML other m 2021-11-27T20:30:39.19
IV.LNSS.HNE. ML:1.4 0.00015889525 0.1024 AML other m 2021-11-27T20:30:39.09
IV.CESI.HNE. ML:1.5 0.00016818260000000003 0.192 AML other m 2021-11-27T20:30:38.88
IV.CESI.HNN. ML:1.6 0.0002144731 0.256 AML other m 2021-11-27T20:30:38.93
IV.SMA1.EHN. ML:1.3 0.00010109197 0.1792 AML other m 2021-11-27T20:30:40.50
IV.SMA1.EHE. ML:1.0 0.00005319899 0.64 AML other m 2021-11-27T20:30:39.68
IV.MML1.EHE. ML:1.0 0.000038514649999999996 0.1408 AML other m 2021-11-27T20:30:41.63
IV.MML1.EHN. ML:1.0 0.000042955085 0.2048 AML other m 2021-11-27T20:30:41.09
IV.GUMA.HNN. ML:1.7 0.0002264794 0.128 AML other m 2021-11-27T20:30:41.28
IV.MF5.EHE. ML:1.3 0.00008378608500000001 0.7296 AML other m 2021-11-27T20:30:41.68
IV.MF5.EHN. ML:1.4 0.00011720868500000001 0.3328 AML other m 2021-11-27T20:30:41.82
IV.RM33.HNE. ML:1.4 0.00009630365 1.6256 AML other m 2021-11-27T20:30:41.23
IV.RM33.EHN. ML:1.0 0.000032507254999999996 0.1792 AML other m 2021-11-27T20:30:42.90
IV.RM33.EHE. ML:1.0 0.000036038215 0.128 AML other m 2021-11-27T20:30:42.74
IV.RM33.HNN. ML:1.2 0.00006489499 2.5344 AML other m 2021-11-27T20:30:41.15
IV.TERO.HHN. ML:1.2 0.000041657925 0.0896 AML other m 2021-11-27T20:30:44.88
IV.TERO.HHE. ML:1.6 0.00012453344999999999 1.216 AML other m 2021-11-27T20:30:44.62
IV.TERO.HNN. ML:1.7 0.00015283959999999998 0.5376 AML other m 2021-11-27T20:30:44.56
IV.TERO.HNE. ML:1.3 0.000060007455 1.3696 AML other m 2021-11-27T20:30:44.14
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