Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 29-10-2023 and time 21:09:47 (Italy) in region 1 km NW Preci (PG)

A magnitude ML 0.4 earthquake occured in region: 1 km NW Preci (PG), on

  • 29-10-2023 20:09:47 (UTC)
  • 29-10-2023 21:09:47 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8900, 13.0330 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
Preci PG 1 724 724
Visso MC 7 1107 1831
Sellano PG 9 1079 2910
Castelsantangelo sul Nera MC 10 281 3191
Ussita MC 11 444 3635
Monte Cavallo MC 12 145 3780
Norcia PG 12 4957 8737
Cerreto di Spoleto PG 12 1075 9812
Fiordimonte MC 17 202 10014
Pieve Torina MC 17 1458 11472
Cascia PG 19 3217 14689
Fiastra MC 19 559 15248
Vallo di Nera PG 19 364 15612
Acquacanina MC 20 121 15733
Bolognola MC 20 142 15875
Pievebovigliana MC 20 866 16741

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
58 Km E of Perugia (166134 inhabitants)
61 Km W of Teramo (54892 inhabitants)
67 Km NW of L'Aquila (69753 inhabitants)
90 Km SW of Ancona (100861 inhabitants)
92 Km NE 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 0.4 2023-10-29
20:09:47		 42.8905 13.0327 11 2023-10-29
20:23:42		 Sala Sismica INGV-Roma 122555871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-29 20:09:47 ± 0.15
Latitude 42.8905 ± 0.0045
Longitude 13.0327 ± 0.0123
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 122555871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 998
Semi-minor axis of confidence ellipse (meter) 396
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 81
Circular confidence region, given by single value of horizontal uncertainty (meter) 1000.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 241
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.23742
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 4
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 122555871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-29 20:23:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
AC.SRN.HHZ. 2023-10-29T20:11:30.30 3.0 undecidable manual Pg 25.73 0
IV.HPAC.HHZ. 2023-10-29T20:10:57.27 3.0 undecidable manual Pn -5.84 0
IV.BRMO.HHZ. 2023-10-29T20:10:51.93 3.0 negative manual Pg 8.63 0
IV.ZCCA.HHZ. 2023-10-29T20:10:49.88 3.0 undecidable manual Sg 6.39 0
ST.CARE.EHZ. 2023-10-29T20:10:41.85 3.0 negative manual Pn 0.35 0
IV.NARO.HHZ. 2023-10-29T20:10:16.39 3.0 undecidable manual Sn 0.18 0
IV.FNVD.HHZ. 2023-10-29T20:10:11.85 3.0 undecidable manual Pg -0.01 0
IV.PARC.HHZ. 2023-10-29T20:09:58.48 3.0 negative manual Pg -2.11 0
IV.CSP1.EHZ. 2023-10-29T20:09:56.69 0.6 undecidable manual S 32 26.3514 50 -0.07 49
IV.CAFI.HHZ. 2023-10-29T20:09:53.24 3.0 undecidable manual P -4.41 0
IV.MC2.EHZ. 2023-10-29T20:09:53.02 0.3 undecidable manual S 80 12.876 129 0.05 75
IV.VVLD.HHZ. 2023-10-29T20:09:53.18 3.0 positive manual P 0.06 0
IV.FDMO.HHZ. 2023-10-29T20:09:53.96 0.3 undecidable manual S 15 16.7721 122 -0.11 74
IV.CSP1.EHZ. 2023-10-29T20:09:52.64 0.3 undecidable manual P 32 26.3514 50 -0.07 73
IV.FDMO.HHZ. 2023-10-29T20:09:51.22 0.1 undecidable manual P 15 16.7721 122 0.06 99
IV.NRCA.HHZ. 2023-10-29T20:09:51.87 0.1 undecidable manual S 134 9.1797 139 -0.18 98
IV.NRCA.HHZ. 2023-10-29T20:09:50.06 0.1 undecidable manual P 134 9.1797 139 0.08 100
IV.MC2.EHZ. 2023-10-29T20:09:50.73 0.3 undecidable manual P 80 12.876 129 0.2 73
IV.ATCC.EHZ. 2023-10-29T20:09:48.51 3.0 undecidable manual Pn -5.04 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.7 0.0000582 1.86 AML other m 2023-10-29T20:09:52.93
IV.NRCA.HHE. ML:0.6 0.000043700000000000005 1.1 AML other m 2023-10-29T20:09:52.01
IV.FDMO.HHE. ML:0.1 0.0000096668065 1.6384 AML other m 2023-10-29T20:09:55.00
IV.FDMO.HHN. ML:0.2 0.000013499219 0.1408 AML other m 2023-10-29T20:09:54.48
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