Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 02-10-2023 and time 13:01:28 (UTC) in region 3 km SW Cascia (PG)

A magnitude ML 1.1 earthquake occured in region: 3 km SW Cascia (PG), on

  • 02-10-2023 13:01:28 (UTC)
  • 02-10-2023 15:01:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6980, 12.9840 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
Cascia PG 3 3217 3217
Poggiodomo PG 4 117 3334
Monteleone di Spoleto PG 6 599 3933
Scheggino PG 13 461 4394
Sant'Anatolia di Narco PG 13 564 4958
Vallo di Nera PG 13 364 5322
Norcia PG 14 4957 10279
Cerreto di Spoleto PG 15 1075 11354
Leonessa RI 15 2435 13789
Polino TR 17 233 14022
Cittareale RI 17 482 14504
Ferentillo TR 18 1913 16417

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km E of Terni (111501 inhabitants)
37 Km SE of Foligno (57155 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
59 Km W of Teramo (54892 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
78 Km E of Viterbo (67173 inhabitants)
80 Km N of Guidonia Montecelio (88673 inhabitants)
83 Km N of Tivoli (56533 inhabitants)
98 Km W of Montesilvano (53738 inhabitants)
99 Km NE of Roma (2864731 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 1.1 2023-10-02
13:01:28		 42.6985 12.9842 10 2023-10-02
13:13:05		 Sala Sismica INGV-Roma 121675271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-02 13:01:28 ± 0.07
Latitude 42.6985 ± 0.0045
Longitude 12.9842 ± 0.0061
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 121675271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 504
Semi-minor axis of confidence ellipse (meter) 433
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 134
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 110
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.34624
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 121675271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-02 13:13:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
4P.IT07A.HHZ. 2023-10-02T13:02:03.38 3.0 negative manual Pg 3.19 0
IV.BDI.HHZ. 2023-10-02T13:01:53.28 3.0 undecidable manual Pg 6.48 0
GU.GSCL.HHZ. 2023-10-02T13:01:51.22 3.0 positive manual Pg 1.04 0
IV.FDMO.HHZ. 2023-10-02T13:01:41.60 0.6 undecidable manual S 13 38.4282 50 -0.01 48
IV.MC2.EHZ. 2023-10-02T13:01:39.35 0.6 undecidable manual S 35 28.9488 50 0.28 47
IV.CAFI.HHZ. 2023-10-02T13:01:38.59 3.0 undecidable manual S -2.65 0
IV.NRCA.HHZ. 2023-10-02T13:01:35.79 0.6 undecidable manual S 35 18.3705 118 -0.07 50
7F.SIB1.EHE. 2023-10-02T13:01:35.05 0.1 undecidable manual P 47 31.8459 50 -0.06 97
IV.FDMO.HHZ. 2023-10-02T13:01:35.94 1.0 positive manual P 13 38.4282 50 -0.18 23
IV.MC2.EHZ. 2023-10-02T13:01:34.54 0.1 undecidable manual P 35 28.9488 50 -0.12 96
IV.LNSS.HHZ. 2023-10-02T13:01:33.84 0.6 undecidable manual S 157 11.5773 130 -0.06 50
IV.NRCA.HHZ. 2023-10-02T13:01:32.91 0.6 negative manual P 35 18.3705 118 0.11 49
IV.GAVE.EHZ. 2023-10-02T13:01:32.77 0.6 undecidable manual S 265 7.3815 143 -0.13 50
IV.LNSS.HHZ. 2023-10-02T13:01:31.86 1.0 undecidable manual P 157 11.5773 130 0.19 24
IV.GAVE.EHZ. 2023-10-02T13:01:31.21 0.1 positive manual P 265 7.3815 143 0.12 100
IV.TRIF.CHZ. 2023-10-02T13:01:30.54 3.0 negative manual P -3.44 0
IV.RIBO.EHZ.01 2023-10-02T13:01:23.71 3.0 undecidable manual P -7.17 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:1.3 0.00029331370000000004 0.1024 AML other m 2023-10-02T13:01:32.90
IV.GAVE.EHE. ML:1.4 0.00040649999999999996 0.16 AML other m 2023-10-02T13:01:33.07
IV.LNSS.HHE. ML:0.8 0.00007555000000000001 0.52 AML other m 2023-10-02T13:01:34.34
IV.LNSS.HHN. ML:0.6 0.000050658335000000005 0.16 AML other m 2023-10-02T13:01:34.28
IV.GAVE.HNE. ML:1.5 0.00045133555 0.1664 AML other m 2023-10-02T13:01:33.06
IV.GAVE.HNN. ML:1.1 0.000171075515 1.2224 AML other m 2023-10-02T13:01:33.74
IV.LNSS.HNE. ML:0.9 0.00009422995000000001 0.1536 AML other m 2023-10-02T13:01:34.21
IV.LNSS.HNN. ML:1.1 0.00015841935 0.8064 AML other m 2023-10-02T13:01:37.47
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