Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 15-12-2023 and time 07:41:42 (Italy) in region 4 km S Norcia (PG)

A magnitude ML 1.8 earthquake occured in region: 4 km S Norcia (PG), on

  • 15-12-2023 06:41:42 (UTC)
  • 15-12-2023 07:41:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7560, 13.1040 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 4 4957 4957
Cascia PG 8 3217 8174
Accumoli RI 14 667 8841
Poggiodomo PG 15 117 8958
Preci PG 15 724 9682
Arquata del Tronto AP 16 1178 10860
Cittareale RI 16 482 11342
Castelsantangelo sul Nera MC 16 281 11623
Cerreto di Spoleto PG 17 1075 12698
Monteleone di Spoleto PG 17 599 13297
Visso MC 20 1107 14404
Vallo di Nera PG 20 364 14768

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km SE of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
50 Km W of Teramo (54892 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
70 Km SE of Perugia (166134 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
92 Km N of Tivoli (56533 inhabitants)
96 Km W of Pescara (121014 inhabitants)
98 Km W of Chieti (51815 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 1.8 2023-12-15
06:41:42		 42.7563 13.1042 11 2023-12-15
06:52:28		 Sala Sismica INGV-Roma 124031471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-12-15 06:41:42 ± 0.05
Latitude 42.7563 ± 0.0027
Longitude 13.1042 ± 0.0037
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 124031471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 246
Semi-minor axis of confidence ellipse (meter) 238
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 132
Circular confidence region, given by single value of horizontal uncertainty (meter) 250.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 48
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.07734
Epicentral distance of station farthest from the epicenter (degree) 0.88223
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 39
Type of magnitude ML
Reference to an origin 124031471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-12-15 06:52:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CING.HHZ. 2023-12-15T06:42:04.20 0.3 undecidable manual S 6 69.0753 50 0.75 55
IV.SNTG.HHZ. 2023-12-15T06:42:00.58 0.1 undecidable manual S 347 56.8986 50 0.39 85
IV.PIEI.HHZ. 2023-12-15T06:41:58.69 0.1 undecidable manual P 332 97.9242 50 -0.34 79
IV.ASSB.HHZ. 2023-12-15T06:41:57.94 0.1 undecidable manual S 311 48.1185 50 0.08 92
IV.CESX.HHZ. 2023-12-15T06:41:57.45 0.6 undecidable manual S 249 45.2214 50 0.36 43
IV.TERO.HHZ. 2023-12-15T06:41:56.45 0.1 undecidable manual S 110 43.3233 50 -0.13 92
IV.CSP1.EHZ. 2023-12-15T06:41:55.23 0.1 undecidable manual S 12 38.1285 50 0.06 94
IV.CING.HHZ. 2023-12-15T06:41:55.22 0.1 undecidable manual P 6 69.0753 50 0.64 76
IV.MML1.EHZ. 2023-12-15T06:41:55.89 0.1 undecidable manual S 345 41.0256 50 -0.07 93
IV.MF5.EHZ. 2023-12-15T06:41:55.82 0.3 undecidable manual S 48 38.628 50 0.5 64
IV.CAMP.HHZ. 2023-12-15T06:41:54.28 0.3 undecidable manual S 134 34.9428 50 -0.04 71
IV.FDMO.HHZ. 2023-12-15T06:41:53.02 0.1 undecidable manual S 357 31.1466 50 -0.29 91
IV.CESI.HHZ. 2023-12-15T06:41:53.54 0.1 undecidable manual S 330 31.9458 50 0 96
IV.SNTG.HHZ. 2023-12-15T06:41:52.99 0.3 undecidable manual P 347 56.8986 50 0.29 65
IV.MMO1.EHZ. 2023-12-15T06:41:51.29 0.1 undecidable manual S 49 24.0537 50 -0.14 95
IV.ASSB.HHZ. 2023-12-15T06:41:51.20 0.1 undecidable manual P 311 48.1185 50 -0.15 91
IV.MTRA.EHN. 2023-12-15T06:41:51.05 0.1 undecidable manual S 90 23.8539 50 -0.31 91
IV.SMA1.EHZ. 2023-12-15T06:41:51.60 0.3 undecidable manual S 126 23.4543 50 0.34 68
IT.MTCL.HGZ. 2023-12-15T06:41:51.94 0.1 undecidable manual S 342 27.6501 50 -0.46 88
IV.MF5.EHZ. 2023-12-15T06:41:50.32 0.3 negative manual P 48 38.628 50 0.43 65
IV.CESX.HHZ. 2023-12-15T06:41:50.97 0.6 undecidable manual P 249 45.2214 50 0.07 46
7F.SIB1.EHN. 2023-12-15T06:41:50.56 0.1 undecidable manual S 41 20.4684 50 0.1 96
IV.FEMA.HNZ. 2023-12-15T06:41:50.99 0.1 undecidable manual S 349 23.2545 50 -0.22 93
IV.TERO.HHZ. 2023-12-15T06:41:50.45 0.6 positive manual P 110 43.3233 50 -0.16 46
IV.MC2.EHZ. 2023-12-15T06:41:50.03 0.1 undecidable manual S 22 18.5703 120 0.14 95
IV.MML1.EHZ. 2023-12-15T06:41:50.53 0.1 undecidable manual P 345 41.0256 50 0.27 89
7F.SIB2.EHZ. 2023-12-15T06:41:50.63 0.1 undecidable manual S 47 22.0668 50 -0.26 93
IV.ARRO.EHZ. 2023-12-15T06:41:49.01 0.6 undecidable manual P 235 33.8439 50 -0.14 47
IV.CAMP.HHZ. 2023-12-15T06:41:49.24 0.1 undecidable manual P 134 34.9428 50 -0.06 94
7F.SIB3.EHZ. 2023-12-15T06:41:49.82 0.1 undecidable manual S 46 18.87 120 -0.16 95
IV.LNSS.HHZ. 2023-12-15T06:41:49.64 0.1 undecidable manual S 197 17.7711 121 -0.02 98
IV.CSP1.EHZ. 2023-12-15T06:41:49.69 0.1 positive manual P 12 38.1285 50 -0.11 93
IV.GAVE.EHZ. 2023-12-15T06:41:49.74 0.3 undecidable manual S 247 18.5703 120 -0.14 72
IV.FDMO.HHZ. 2023-12-15T06:41:48.57 0.6 positive manual P 357 31.1466 50 -0.15 47
IV.CESI.HHZ. 2023-12-15T06:41:48.69 0.1 undecidable manual P 330 31.9458 50 -0.17 93
IV.MTRA.EHN. 2023-12-15T06:41:47.76 0.1 undecidable manual P 90 23.8539 50 0.16 94
IV.SMA1.EHZ. 2023-12-15T06:41:47.75 0.6 positive manual P 126 23.4543 50 0.21 47
IV.NRCA.HNZ. 2023-12-15T06:41:47.22 0.1 undecidable manual S 5 8.5803 141 0 100
7F.SIB2.EHZ. 2023-12-15T06:41:47.14 0.1 undecidable manual P 47 22.0668 50 -0.19 94
IT.MTCL.HGZ. 2023-12-15T06:41:47.95 0.1 undecidable manual P 342 27.6501 50 -0.25 92
7F.SIB1.EHN. 2023-12-15T06:41:47.06 0.1 undecidable manual P 41 20.4684 50 -0.02 98
IV.FEMA.HNZ. 2023-12-15T06:41:47.54 0.1 undecidable manual P 349 23.2545 50 0.03 97
IV.MMO1.EHZ. 2023-12-15T06:41:47.53 0.3 positive manual P 49 24.0537 50 -0.11 71
IV.GAVE.EHZ. 2023-12-15T06:41:46.78 0.1 positive manual P 247 18.5703 120 0.04 98
7F.SIB3.EHZ. 2023-12-15T06:41:46.68 0.1 undecidable manual P 46 18.87 120 -0.12 96
IV.MC2.EHZ. 2023-12-15T06:41:46.80 0.1 undecidable manual P 22 18.5703 120 0.05 97
IV.LNSS.HHZ. 2023-12-15T06:41:46.65 0.3 positive manual P 197 17.7711 121 0.03 73
IV.NRCA.HNZ. 2023-12-15T06:41:45.39 0.3 undecidable manual P 5 8.5803 141 0.18 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:2.7 0.007265000000000001 0.14 AML other m 2023-12-15T06:41:47.41
IV.NRCA.HNE. ML:2.7 0.006849999999999999 0.12 AML other m 2023-12-15T06:41:47.41
IV.NRCA.HNN. ML:2.3 0.00269 0.14 AML other m 2023-12-15T06:41:48.57
IV.NRCA.HHN. ML:2.4 0.00299 0.14 AML other m 2023-12-15T06:41:48.57
IV.LNSS.HHE. ML:1.7 0.00043300000000000006 1.56 AML other m 2023-12-15T06:41:49.02
IV.LNSS.HNE. ML:1.7 0.0004445 1.56 AML other m 2023-12-15T06:41:49.03
IV.GAVE.EHN. ML:2.1 0.0009845 0.34 AML other m 2023-12-15T06:41:50.10
IV.LNSS.HHN. ML:1.7 0.00042791925000000005 0.3584 AML other m 2023-12-15T06:41:50.60
IV.LNSS.HNN. ML:1.7 0.0003818742 0.3424 AML other m 2023-12-15T06:41:50.62
IV.GAVE.EHE. ML:1.9 0.0006405000000000001 0.28 AML other m 2023-12-15T06:41:51.66
IV.MMO1.EHN. ML:1.7 0.00030387565 0.1216 AML other m 2023-12-15T06:41:52.60
IV.SMA1.EHN. ML:1.6 0.0002196361 0.2784 AML other m 2023-12-15T06:41:55.03
IV.MMO1.EHE. ML:1.6 0.0002254091 0.2592 AML other m 2023-12-15T06:41:52.15
IV.SMA1.EHE. ML:1.6 0.0002337204 0.4 AML other m 2023-12-15T06:41:53.14
IV.FDMO.HHN. ML:2.0 0.000433 0.24 AML other m 2023-12-15T06:41:53.73
IV.CESI.HHN. ML:1.8 0.00028626155000000003 0.16 AML other m 2023-12-15T06:41:54.25
IV.FDMO.HHE. ML:1.8 0.000314 0.16 AML other m 2023-12-15T06:41:54.57
IV.CESI.HHE. ML:1.8 0.00027600000000000004 0.16 AML other m 2023-12-15T06:41:54.60
IV.CSP1.EHN. ML:2.2 0.0005993893 0.1408 AML other m 2023-12-15T06:41:55.53
IV.CSP1.EHE. ML:2.2 0.0006402916000000001 0.1984 AML other m 2023-12-15T06:41:55.73
IV.MML1.HNE. ML:1.8 0.000196898 0.1408 AML other m 2023-12-15T06:41:57.00
IV.MML1.EHE. ML:1.8 0.00019349645 0.1376 AML other m 2023-12-15T06:41:56.93
IV.MML1.EHN. ML:1.8 0.000208092 0.1792 AML other m 2023-12-15T06:41:56.57
IV.MML1.HNN. ML:1.8 0.0002000865 0.1696 AML other m 2023-12-15T06:41:56.57
IV.ASSB.HHE. ML:1.7 0.00014709155000000002 0.1984 AML other m 2023-12-15T06:41:59.09
IV.TERO.HHE. ML:1.4 0.000082311625 0.2784 AML other m 2023-12-15T06:42:00.31
IV.TERO.HHN. ML:1.7 0.00014766465000000002 0.32 AML other m 2023-12-15T06:41:59.70
IV.ASSB.HHN. ML:1.8 0.000159333745 0.1792 AML other m 2023-12-15T06:41:59.69
IV.SNTG.HHE. ML:1.6 0.00009677657000000001 0.2624 AML other m 2023-12-15T06:42:00.98
IV.SNTG.HHN. ML:1.7 0.00011772865 0.1984 AML other m 2023-12-15T06:42:00.94
IV.GAVE.HNE. ML:1.9 0.0006281242500000001 0.2912 AML other m 2023-12-15T06:41:51.67
IV.GAVE.HNN. ML:1.6 0.00029223054999999996 0.3424 AML other m 2023-12-15T06:41:50.10
IV.CESI.HNE. ML:1.8 0.00026862865000000004 0.1696 AML other m 2023-12-15T06:41:54.60
IV.CESI.HNN. ML:1.8 0.00028171885 0.1728 AML other m 2023-12-15T06:41:54.25
IV.CESX.HHE. ML:1.5 0.0000897764 0.3392 AML other m 2023-12-15T06:41:59.67
IV.CESX.HHN. ML:1.7 0.00013683479999999999 0.4416 AML other m 2023-12-15T06:42:01.32
IV.SNTG.HNN. ML:1.8 0.00014224268000000002 0.2688 AML other m 2023-12-15T06:42:00.72
IV.PIEI.HHE. ML:1.4 0.000026475915000000003 0.24 AML other m 2023-12-15T06:42:18.70
IV.PIEI.HHN. ML:1.3 0.00002045766815 0.32 AML other m 2023-12-15T06:42:16.30
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