Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 12-07-2023 and time 10:22:59 (UTC) in region 2 km E Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 2 km E Norcia (PG), on

  • 12-07-2023 10:22:59 (UTC)
  • 12-07-2023 12:22:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8040, 13.1200 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
Castelsantangelo sul Nera MC 11 281 5238
Preci PG 11 724 5962
Cascia PG 13 3217 9179
Visso MC 14 1107 10286
Arquata del Tronto AP 15 1178 11464
Ussita MC 16 444 11908
Accumoli RI 16 667 12575
Cerreto di Spoleto PG 17 1075 13650
Montegallo AP 18 523 14173
Poggiodomo PG 18 117 14290
Sellano PG 18 1079 15369

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
50 Km W of Teramo (54892 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
94 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)
97 Km W of Pescara (121014 inhabitants)
100 Km NW 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
Bulletin
Rev1000 		ML 1.0 2023-07-12
10:22:59		 42.8042 13.1202 11 2024-09-10
16:44:12		 Bollettino Sismico Italiano INGV 119367521
Reviewed
Rev100 		ML 1.0 2023-07-12
10:22:59		 42.8082 13.0978 10 2023-07-12
10:33:51		 Sala Sismica INGV-Roma 119192411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-07-12 10:22:59 ± 0.05
Latitude 42.8042 ± 0.0027
Longitude 13.1202 ± 0.0049
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 119367521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 378
Semi-minor axis of confidence ellipse (meter) 254
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 299
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 116
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.39840
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 119367521
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-08-08 23:21:27

ML:1.0

Field Value
Value 1.0
Uncertainty 0.5
Num. used stations 8
Type of magnitude ML
Reference to an origin 119192411
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-07-12 10:33:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OT.TAR1.HHZ. 2023-07-12T10:24:56.47 3.0 undecidable manual Sg 6.45 0
OX.ACOM.HHZ. 2023-07-12T10:24:52.35 3.0 undecidable manual Sg 5.76 0
SL.LJU.BHZ. 2023-07-12T10:24:36.17 3.0 undecidable manual Sn -1.34 0
IV.ALJA.HHZ. 2023-07-12T10:24:26.79 3.0 undecidable manual Pg 6.4 0
GU.PCP.HHZ. 2023-07-12T10:24:10.15 3.0 undecidable manual Pg 8.13 0
IV.PAOL.HNZ. 2023-07-12T10:24:04.15 3.0 undecidable manual Sg -2.94 0
IV.SALB.HHZ. 2023-07-12T10:24:02.22 3.0 undecidable manual Pn -0.13 0
IV.MOCO.HHZ. 2023-07-12T10:23:34.16 3.0 undecidable manual Pn -4.55 0
IV.RIBO.EHZ.01 2023-07-12T10:23:30.27 3.0 undecidable manual Pg -1.68 0
IV.CSNT.HHZ. 2023-07-12T10:23:29.59 3.0 undecidable manual P -1.6 0
IV.ARVD.HHZ. 2023-07-12T10:23:21.64 3.0 undecidable manual S -7.09 0
IV.TERO.HHZ. 2023-07-12T10:23:14.06 0.6 undecidable manual S 117 44.2224 50 -0.01 47
IV.RM33.EHZ. 2023-07-12T10:23:11.12 0.3 undecidable manual S 167 33.6441 50 -0.11 71
IV.CSP1.EHZ. 2023-07-12T10:23:10.96 0.3 undecidable manual S 12 32.6451 50 -0.01 73
IV.FDMO.HHZ. 2023-07-12T10:23:09.02 0.3 undecidable manual S 354 25.9518 50 -0.15 71
IV.GAVE.EHZ. 2023-07-12T10:23:08.18 0.6 undecidable manual S 236 22.1556 115 0 49
IV.TERO.HHZ. 2023-07-12T10:23:07.92 0.1 undecidable manual P 117 44.2224 50 -0.06 94
7F.SIB2.EHZ. 2023-07-12T10:23:06.62 0.3 undecidable manual S 57 17.7711 120 -0.2 72
IV.CSP1.EHZ. 2023-07-12T10:23:06.23 0.3 undecidable manual P 12 32.6451 50 0.04 72
7F.SIB1.EHZ. 2023-07-12T10:23:06.32 0.6 undecidable manual S 50 15.7731 124 0.09 49
IV.RM33.EHZ. 2023-07-12T10:23:06.48 0.3 undecidable manual P 167 33.6441 50 0.14 70
IV.MC2.EHZ. 2023-07-12T10:23:05.79 0.6 undecidable manual S 25 13.1757 129 0.3 47
7F.SIB3.EHZ. 2023-07-12T10:23:05.62 0.6 undecidable manual S 57 14.4744 126 -0.25 48
IV.FDMO.HHZ. 2023-07-12T10:23:05.07 0.1 undecidable manual P 354 25.9518 50 -0.08 96
IV.GAVE.EHZ. 2023-07-12T10:23:04.63 0.1 undecidable manual P 236 22.1556 115 0.05 98
7F.SIB3.EHZ. 2023-07-12T10:23:03.30 0.1 undecidable manual P 57 14.4744 126 0.06 99
IV.MC2.EHZ. 2023-07-12T10:23:03.32 0.1 undecidable manual P 25 13.1757 129 0.29 94
IV.NRCA.HHZ. 2023-07-12T10:23:03.10 0.1 undecidable manual S 352 3.2967 163 -0.37 94
7F.SIB2.EHZ. 2023-07-12T10:23:03.78 0.1 undecidable manual P 57 17.7711 120 -0.01 99
7F.SIB1.EHZ. 2023-07-12T10:23:03.63 0.1 undecidable manual P 50 15.7731 124 0.17 96
IV.NRCA.HHZ. 2023-07-12T10:23:01.95 0.1 undecidable manual P 352 3.2967 163 0.09 100
IV.FIAM.HHZ. 2023-07-12T10:23:01.50 3.0 undecidable manual P -8.8 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:1.6 0.0006019433 0.1024 AML other m 2023-07-12T10:23:03.20
IV.NRCA.HHN. ML:1.6 0.0007163762 0.1024 AML other m 2023-07-12T10:23:03.20
IV.NRCA.HNE. ML:1.4 0.00042954274999999997 0.1216 AML other m 2023-07-12T10:23:03.27
IV.NRCA.HHE. ML:1.4 0.00043811865 0.1216 AML other m 2023-07-12T10:23:03.27
IV.GAVE.EHE. ML:0.7 0.000033354025 0.1792 AML other m 2023-07-12T10:23:08.46
IV.FDMO.HHE. ML:0.6 0.00001795 0.22 AML other m 2023-07-12T10:23:09.68
IV.FDMO.HHN. ML:0.4 0.0000166070295 1.8784 AML other m 2023-07-12T10:23:10.95
IV.CSP1.EHE. ML:1.1 0.00005644822 0.1568 AML other m 2023-07-12T10:23:10.23
IV.GAVE.EHN. ML:0.6 0.00002367198 0.1408 AML other m 2023-07-12T10:23:10.68
IV.CSP1.EHN. ML:1.0 0.00004115254 0.4224 AML other m 2023-07-12T10:23:11.38
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