Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 09-01-2023 and time 18:41:50 (UTC) in region 3 km SW Norcia (PG)

A magnitude ML 1.8 earthquake occured in region: 3 km SW Norcia (PG), on

  • 09-01-2023 18:41:50 (UTC)
  • 09-01-2023 19:41:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7750, 13.0660 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 8 3217 8174
Preci PG 12 724 8898
Poggiodomo PG 13 117 9015
Cerreto di Spoleto PG 13 1075 10090
Castelsantangelo sul Nera MC 15 281 10371
Monteleone di Spoleto PG 17 599 10970
Vallo di Nera PG 17 364 11334
Sellano PG 17 1079 12413
Accumoli RI 17 667 13080
Visso MC 18 1107 14187
Arquata del Tronto AP 19 1178 15365
Cittareale RI 19 482 15847
Sant'Anatolia di Narco PG 19 564 16411
Ussita MC 20 444 16855

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SE of Foligno (57155 inhabitants)
42 Km NE of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
66 Km SE of Perugia (166134 inhabitants)
88 Km E of Viterbo (67173 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km N of Tivoli (56533 inhabitants)
93 Km W of Montesilvano (53738 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 1.8 2023-01-09
18:41:50		 42.7748 13.0662 10 2024-03-01
17:17:53		 Bollettino Sismico Italiano INGV 113827131
Reviewed
Rev100 		ML 1.9 2023-01-09
18:41:50		 42.7747 13.0638 11 2023-01-09
18:52:05		 Sala Sismica INGV-Roma 113437001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-09 18:41:50 ± 0.04
Latitude 42.7748 ± 0.0018
Longitude 13.0662 ± 0.0037
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 113827131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 257
Semi-minor axis of confidence ellipse (meter) 79
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 101
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 43
Number of associated phases, regardless of their use for origin computation 58
Number of defining phases 58
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) 0.06835
Epicentral distance of station farthest from the epicenter (degree) 0.55488
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 36
Type of magnitude ML
Reference to an origin 113827131
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-01-27 10:09:31

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 113437001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-09 18:52:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2023-01-09T18:42:10.09 0.3 undecidable manual S 3 61.5939 50 0.55 62
IV.FIAM.HHZ. 2023-01-09T18:42:08.07 0.6 undecidable manual S 176 56.3991 50 -0.08 46
IV.GIGS.HHZ. 2023-01-09T18:42:07.46 0.6 undecidable manual S 131 54.6009 50 -0.22 45
IV.SNTG.HHZ. 2023-01-09T18:42:07.78 0.6 undecidable manual S 349 54.2013 50 0.2 45
IV.SAP2.EHE. 2023-01-09T18:42:05.72 0.6 undecidable manual S 37 44.8218 50 0.66 41
IV.TERO.HHZ. 2023-01-09T18:42:05.56 0.6 undecidable manual S 111 47.0196 50 -0.08 47
IV.MOMA.HHZ. 2023-01-09T18:42:04.43 0.6 undecidable manual S 275 40.5261 50 0.51 43
IV.MF5.EHZ. 2023-01-09T18:42:04.21 0.6 undecidable manual S 53 39.7269 50 0.49 44
IV.CESX.HHZ. 2023-01-09T18:42:04.84 0.3 undecidable manual S 245 43.2234 50 0.2 69
IV.ASSB.HHZ. 2023-01-09T18:42:04.29 0.3 undecidable manual S 312 44.5221 50 -0.69 60
IV.GUMA.HNN. 2023-01-09T18:42:03.78 0.6 undecidable manual S 34 38.7279 50 0.35 45
IV.MML1.EHZ. 2023-01-09T18:42:03.22 0.6 undecidable manual S 348 38.3283 50 -0.12 47
IV.CAMP.HHZ. 2023-01-09T18:42:03.63 0.6 undecidable manual S 133 38.5281 50 0.24 46
IV.CSP1.EHZ. 2023-01-09T18:42:02.95 0.3 undecidable manual S 18 36.9297 50 -0.01 73
IV.ARRO.EHZ. 2023-01-09T18:42:01.93 0.3 undecidable manual S 229 32.745 50 0.09 72
IV.EL6.EHZ. 2023-01-09T18:42:01.38 0.6 undecidable manual P 3 61.5939 50 -0.11 46
IV.RM33.EHZ. 2023-01-09T18:42:01.53 0.3 undecidable manual S 158 31.8459 50 -0.08 73
IV.SNTG.HHZ. 2023-01-09T18:42:00.18 0.6 undecidable manual P 349 54.2013 50 -0.18 46
IV.FDMO.HHZ. 2023-01-09T18:42:00.50 0.3 undecidable manual S 3 29.0487 50 -0.37 69
IV.CESI.HHZ. 2023-01-09T18:42:00.56 0.3 undecidable manual S 333 28.749 50 -0.21 71
IV.GIGS.HHZ. 2023-01-09T18:42:00.08 0.6 undecidable manual P 131 54.6009 50 -0.34 44
IV.MTRA.EHZ. 2023-01-09T18:42:00.10 0.3 undecidable manual S 94 26.9508 50 -0.2 71
IV.FIAM.HHZ. 2023-01-09T18:42:00.48 0.6 undecidable manual P 176 56.3991 50 -0.21 45
IV.SMA1.EHZ. 2023-01-09T18:42:00.36 0.3 undecidable manual S 126 27.1506 50 0.01 74
IV.TERO.HHZ. 2023-01-09T18:41:59.13 0.6 undecidable manual P 111 47.0196 50 -0.11 47
IV.MMO1.EHZ. 2023-01-09T18:41:59.66 0.3 undecidable manual S 57 25.2525 50 -0.2 72
IT.MTCL.HGZ. 2023-01-09T18:41:59.49 0.3 undecidable manual S 347 24.8529 50 -0.26 71
IV.SAP2.EHE. 2023-01-09T18:41:59.48 0.3 undecidable manual P 37 44.8218 50 0.57 63
IV.CESX.HHZ. 2023-01-09T18:41:58.67 0.6 undecidable manual P 245 43.2234 50 0.01 48
IV.ASSB.HHZ. 2023-01-09T18:41:58.82 0.3 undecidable manual P 312 44.5221 50 -0.04 72
IV.LNSS.HHZ. 2023-01-09T18:41:58.01 0.1 undecidable manual S 186 19.1697 118 -0.05 100
IV.FEMA.HNE. 2023-01-09T18:41:58.40 0.3 undecidable manual S 356 20.868 116 -0.17 73
IV.MOMA.HHZ. 2023-01-09T18:41:58.45 0.6 undecidable manual P 275 40.5261 50 0.21 46
IV.MF5.EHZ. 2023-01-09T18:41:58.67 0.1 undecidable manual P 53 39.7269 50 0.54 86
7F.SIB1.EHE. 2023-01-09T18:41:58.52 0.3 undecidable manual S 51 21.2676 116 -0.18 73
IV.CSP1.EHZ. 2023-01-09T18:41:57.67 0.3 undecidable manual P 18 36.9297 50 -0.02 73
IV.CAMP.HHZ. 2023-01-09T18:41:57.86 0.6 undecidable manual P 133 38.5281 50 -0.08 48
7F.SIB3.EHN. 2023-01-09T18:41:57.95 0.6 undecidable manual S 56 19.9689 117 -0.35 47
IV.ARRO.EHZ. 2023-01-09T18:41:57.09 0.6 undecidable manual P 229 32.745 50 0.05 49
IV.GUMA.HNN. 2023-01-09T18:41:57.33 0.6 undecidable manual P 34 38.7279 50 -0.64 41
IV.GAVE.EHZ. 2023-01-09T18:41:57.23 0.3 undecidable manual S 237 16.7721 122 -0.1 74
IV.MML1.EHZ. 2023-01-09T18:41:57.81 0.6 undecidable manual P 348 38.3283 50 -0.1 48
IV.MC2.EHZ. 2023-01-09T18:41:57.91 0.1 undecidable manual S 33 18.1707 120 0.16 98
IV.MTRA.EHZ. 2023-01-09T18:41:56.03 0.1 undecidable manual P 94 26.9508 50 -0.13 97
IV.SMA1.EHZ. 2023-01-09T18:41:56.24 0.1 undecidable manual P 126 27.1506 50 0.06 98
IV.RM33.EHZ. 2023-01-09T18:41:56.83 0.1 undecidable manual P 158 31.8459 50 -0.09 97
IV.FDMO.HHZ. 2023-01-09T18:41:56.41 0.3 undecidable manual P 3 29.0487 50 -0.08 73
IV.CESI.HHZ. 2023-01-09T18:41:56.41 0.3 undecidable manual P 333 28.749 50 -0.02 74
IT.MTCL.HGZ. 2023-01-09T18:41:55.70 0.3 undecidable manual P 347 24.8529 50 -0.14 73
7F.SIB1.EHE. 2023-01-09T18:41:55.33 0.1 undecidable manual P 51 21.2676 116 0.1 98
IV.FEMA.HNE. 2023-01-09T18:41:55.27 0.3 undecidable manual P 356 20.868 116 0.12 73
IV.MMO1.EHZ. 2023-01-09T18:41:55.83 0.1 undecidable manual P 57 25.2525 50 -0.07 98
IV.GAVE.EHZ. 2023-01-09T18:41:54.66 0.3 undecidable manual P 237 16.7721 122 0.22 72
IV.MC2.EHZ. 2023-01-09T18:41:54.85 0.1 undecidable manual P 33 18.1707 120 0.17 97
IV.NRCA.HHZ. 2023-01-09T18:41:54.83 0.1 undecidable manual S 31 7.5813 144 -0.13 100
IV.LNSS.HHZ. 2023-01-09T18:41:54.96 0.1 undecidable manual P 186 19.1697 118 0.1 99
7F.SIB3.EHN. 2023-01-09T18:41:54.90 0.1 undecidable manual P 56 19.9689 117 -0.1 98
IV.NRCA.HHZ. 2023-01-09T18:41:53.22 0.1 undecidable manual P 31 7.5813 144 0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.2 0.002355 1.86 AML other m 2023-01-09T18:41:54.03
IV.NRCA.HHE. ML:2.2 0.0022800000000000003 1.86 AML other m 2023-01-09T18:41:54.03
IV.NRCA.HNN. ML:2.4 0.003285 1.9 AML other m 2023-01-09T18:41:55.01
IV.NRCA.HHN. ML:2.4 0.003675 1.9 AML other m 2023-01-09T18:41:55.01
IV.GAVE.EHN. ML:1.8 0.0006005 0.3 AML other m 2023-01-09T18:41:58.27
IV.LNSS.HHE. ML:2.0 0.000726 0.12 AML other m 2023-01-09T18:41:58.57
IV.LNSS.HNE. ML:1.9 0.000682 0.14 AML other m 2023-01-09T18:41:58.57
IV.LNSS.HHN. ML:1.9 0.0006915000000000001 0.14 AML other m 2023-01-09T18:41:58.59
IV.MC2.EHN. ML:2.2 0.0011899999999999999 1.78 AML other m 2023-01-09T18:41:58.06
IV.LNSS.HNN. ML:1.9 0.0006835 1.06 AML other m 2023-01-09T18:41:59.13
IV.MC2.EHE. ML:2.2 0.001293 0.34 AML other m 2023-01-09T18:41:59.32
IV.GAVE.EHE. ML:1.8 0.00048148874999999995 0.3328 AML other m 2023-01-09T18:41:57.59
IV.MMO1.EHN. ML:1.8 0.00040649999999999996 1.34 AML other m 2023-01-09T18:41:59.82
IV.MMO1.EHE. ML:1.9 0.000506 0.16 AML other m 2023-01-09T18:41:59.83
IV.FDMO.HHE. ML:1.7 0.00023300000000000003 1.42 AML other m 2023-01-09T18:42:00.15
IV.FDMO.HHN. ML:1.6 0.00020600000000000002 0.22 AML other m 2023-01-09T18:42:00.75
IV.MTRA.EHN. ML:1.9 0.000389 1.34 AML other m 2023-01-09T18:42:01.67
IV.MTRA.HNN. ML:1.8 0.00037 1.34 AML other m 2023-01-09T18:42:01.00
IV.MTRA.EHE. ML:2.0 0.000504 0.62 AML other m 2023-01-09T18:42:01.00
IV.MTRA.HNE. ML:1.9 0.00047 1.6 AML other m 2023-01-09T18:42:01.00
IV.SMA1.EHN. ML:1.6 0.000235 0.86 AML other m 2023-01-09T18:42:01.86
IV.RM33.EHE. ML:1.6 0.00016295 0.52 AML other m 2023-01-09T18:42:02.53
IV.SMA1.EHE. ML:1.5 0.000175 0.48 AML other m 2023-01-09T18:42:02.45
IV.RM33.EHN. ML:1.5 0.00014150000000000002 1.14 AML other m 2023-01-09T18:42:02.19
IV.CSP1.EHE. ML:2.0 0.000425 0.32 AML other m 2023-01-09T18:42:03.52
IV.CSP1.EHN. ML:2.1 0.0004955 0.5 AML other m 2023-01-09T18:42:03.66
IV.MOMA.HNN. ML:1.9 0.0002765 1.46 AML other m 2023-01-09T18:42:05.08
IV.MML1.HNE. ML:1.6 0.000157 0.88 AML other m 2023-01-09T18:42:05.45
IV.MOMA.HNE. ML:1.8 0.0002285 0.74 AML other m 2023-01-09T18:42:05.60
IV.MML1.EHN. ML:1.5 0.0001245 0.58 AML other m 2023-01-09T18:42:06.46
IV.MML1.EHE. ML:1.4 0.00009759999999999999 0.42 AML other m 2023-01-09T18:42:06.76
IV.CESI.HHN. ML:1.7 0.00023152355 0.32 AML other m 2023-01-09T18:42:00.85
IV.CESI.HNN. ML:1.7 0.00023427434999999998 0.2048 AML other m 2023-01-09T18:42:01.16
IV.ARRO.EHN. ML:1.5 0.00013715755000000003 2.7392 AML other m 2023-01-09T18:42:02.53
IV.ARRO.EHE. ML:1.4 0.00010866022000000001 0.1536 AML other m 2023-01-09T18:42:04.35
IV.MOMA.HHE. ML:1.7 0.00017515305 0.1792 AML other m 2023-01-09T18:42:05.59
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