Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 04-10-2023 and time 13:29:34 (Italy) in region 7 km E Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 7 km E Norcia (PG), on

  • 04-10-2023 11:29:34 (UTC)
  • 04-10-2023 13:29:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7930, 13.1860 at 10 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 8 4957 4957
Arquata del Tronto AP 9 1178 6135
Castelsantangelo sul Nera MC 12 281 6416
Accumoli RI 12 667 7083
Montegallo AP 13 523 7606
Preci PG 15 724 8330
Cascia PG 16 3217 11547
Montemonaco AP 17 604 12151
Visso MC 17 1107 13258
Ussita MC 17 444 13702
Acquasanta Terme AP 19 2916 16618
Cittareale RI 20 482 17100
Amatrice RI 20 2657 19757

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Foligno (57155 inhabitants)
45 Km W of Teramo (54892 inhabitants)
51 Km NE of Terni (111501 inhabitants)
52 Km NW of L'Aquila (69753 inhabitants)
74 Km E of Perugia (166134 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
92 Km W of Pescara (121014 inhabitants)
94 Km NW of Chieti (51815 inhabitants)
96 Km S of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
97 Km NE of Tivoli (56533 inhabitants)
98 Km E of Viterbo (67173 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 1.0 2023-10-04
11:29:34		 42.7927 13.1855 10 2023-10-04
11:42:58		 Sala Sismica INGV-Roma 121747131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-04 11:29:34 ± 0.05
Latitude 42.7927 ± 0.0027
Longitude 13.1855 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121747131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 350
Semi-minor axis of confidence ellipse (meter) 114
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 120
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.45955
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 18
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 121747131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-04 11:42:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SACR.HHZ. 2023-10-04T11:30:05.00 3.0 negative manual Pn 0.6 0
IV.GIUL.HHZ. 2023-10-04T11:29:56.22 3.0 positive manual P -0.51 0
IV.RCAV.EHZ. 2023-10-04T11:29:53.66 3.0 undecidable manual P 0.67 0
IV.MF5.EHZ. 2023-10-04T11:29:45.55 0.6 undecidable manual S 46 31.0467 50 0.44 44
IV.CESI.HHZ. 2023-10-04T11:29:45.49 0.6 undecidable manual S 316 32.745 50 -0.08 48
IV.CSP1.EHZ. 2023-10-04T11:29:45.94 0.6 undecidable manual S 3 33.2445 50 0.25 46
IV.FDMO.HHZ. 2023-10-04T11:29:44.18 0.6 undecidable manual S 344 28.1496 50 -0.17 47
IV.GAVE.EHZ. 2023-10-04T11:29:43.82 0.6 undecidable manual S 245 26.2515 110 0.03 49
IV.LNSS.HHZ. 2023-10-04T11:29:43.31 0.6 undecidable manual S 209 24.1536 112 0.19 47
IV.ASSB.HHZ. 2023-10-04T11:29:43.31 0.6 undecidable manual P 303 51.0156 50 -0.21 45
IV.SMA1.EHZ. 2023-10-04T11:29:42.16 0.6 undecidable manual S 146 21.7671 114 -0.19 48
IV.TERO.HHZ. 2023-10-04T11:29:41.24 0.6 negative manual P 119 38.9277 50 -0.43 44
IV.MML1.EHZ. 2023-10-04T11:29:41.64 1.0 undecidable manual P 334 39.627 50 -0.12 23
IV.CAMP.HHZ. 2023-10-04T11:29:41.50 0.6 undecidable manual P 147 33.8439 50 0.63 42
IV.MMO1.EHZ. 2023-10-04T11:29:40.72 0.6 undecidable manual S 44 16.4724 121 -0.01 50
7F.SIB1.EHE. 2023-10-04T11:29:40.05 0.6 undecidable manual S 31 13.2756 126 0.27 48
IV.CSP1.EHZ. 2023-10-04T11:29:40.65 1.0 undecidable manual P 3 33.2445 50 -0.13 24
IV.RM33.EHZ. 2023-10-04T11:29:40.70 1.0 undecidable manual P 176 31.5462 50 0.17 23
IV.MF5.EHZ. 2023-10-04T11:29:40.47 0.6 undecidable manual P 46 31.0467 50 0.02 48
IV.MC2.EHN. 2023-10-04T11:29:40.16 0.6 undecidable manual S 1 13.1757 127 0.4 46
IV.CESI.HHZ. 2023-10-04T11:29:40.54 0.1 positive manual P 316 32.745 50 -0.17 94
IV.LNSS.HHZ. 2023-10-04T11:29:39.34 0.6 negative manual P 209 24.1536 112 0.04 49
7F.SIB2.EHE. 2023-10-04T11:29:39.82 0.6 undecidable manual S 41 14.5743 124 -0.34 47
IV.GAVE.EHZ. 2023-10-04T11:29:39.65 0.3 negative manual P 245 26.2515 110 -0.03 73
IV.FDMO.HHZ. 2023-10-04T11:29:39.78 0.6 positive manual P 344 28.1496 50 -0.22 47
IV.MMO1.EHZ. 2023-10-04T11:29:38.01 0.6 negative manual P 44 16.4724 121 0.1 49
7F.SIB3.EHE. 2023-10-04T11:29:38.97 0.6 undecidable manual S 37 11.3775 131 -0.32 47
IV.NRCA.HNZ. 2023-10-04T11:29:38.17 0.6 undecidable manual S 308 7.3815 143 -0.15 49
IV.SMA1.EHZ. 2023-10-04T11:29:38.73 0.6 undecidable manual P 146 21.7671 114 -0.12 48
IV.MC2.EHN. 2023-10-04T11:29:37.55 0.1 undecidable manual P 1 13.1757 127 0.19 97
7F.SIB1.EHE. 2023-10-04T11:29:37.39 0.1 undecidable manual P 31 13.2756 126 0.02 100
7F.SIB2.EHE. 2023-10-04T11:29:37.49 0.1 undecidable manual P 41 14.5743 124 -0.1 98
7F.SIB3.EHE. 2023-10-04T11:29:37.00 0.1 undecidable manual P 37 11.3775 131 -0.09 99
IV.NRCA.HNZ. 2023-10-04T11:29:36.67 0.1 undecidable manual P 308 7.3815 143 0.15 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MMO1.EHE. ML:1.2 0.00013550000000000001 1.26 AML other m 2023-10-04T11:29:40.79
IV.MMO1.EHN. ML:1.0 0.0000983 1.22 AML other m 2023-10-04T11:29:41.82
IV.SMA1.EHE. ML:0.7 0.0000363 1.38 AML other m 2023-10-04T11:29:42.26
IV.SMA1.EHN. ML:0.8 0.00004025 0.56 AML other m 2023-10-04T11:29:43.09
IV.LNSS.HHE. ML:1.2 0.0000918 0.36 AML other m 2023-10-04T11:29:43.59
IV.LNSS.HHN. ML:1.1 0.0000787 0.7 AML other m 2023-10-04T11:29:43.98
IV.CESI.HHN. ML:1.4 0.00011599999999999999 0.22 AML other m 2023-10-04T11:29:45.76
IV.CESI.HHE. ML:1.1 0.000048899999999999996 0.4 AML other m 2023-10-04T11:29:45.65
IV.FDMO.HHE. ML:0.7 0.0000269 1.58 AML other m 2023-10-04T11:29:45.06
IV.FDMO.HHN. ML:0.7 0.00002495 1.52 AML other m 2023-10-04T11:29:46.07
IV.TERO.HHN. ML:0.9 0.00003225 1.92 AML other m 2023-10-04T11:29:46.03
IV.TERO.HHE. ML:1.0 0.00003485 0.54 AML other m 2023-10-04T11:29:47.78
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