Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 20-09-2024 and time 08:58:17 (UTC) in region 3 km W Arrone (TR)

A magnitude ML 1.3 earthquake occured in region: 3 km W Arrone (TR), on

  • 20-09-2024 08:58:17 (UTC)
  • 20-09-2024 10:58:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5790, 12.7380 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
Arrone TR 3 2763 2763
Montefranco TR 3 1276 4039
Ferentillo TR 6 1913 5952
Terni TR 8 111501 117453
Labro RI 8 374 117827
Polino TR 9 233 118060
Colli sul Velino RI 10 533 118593
Morro Reatino RI 10 373 118966
Stroncone TR 11 4917 123883
Rivodutri RI 12 1253 125136
Greccio RI 14 1558 126694
Poggio Bustone RI 15 2055 128749
San Gemini TR 16 5018 133767
Scheggino PG 17 461 134228
Spoleto PG 17 38218 172446
Cantalice RI 18 2755 175201
Leonessa RI 19 2435 177636
Contigliano RI 19 3783 181419
Configni RI 19 633 182052
Sant'Anatolia di Narco PG 19 564 182616
Narni TR 19 19785 202401
Monteleone di Spoleto PG 19 599 203000
Cottanello RI 20 563 203563
Acquasparta TR 20 4778 208341

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km E of Terni (111501 inhabitants)
42 Km S of Foligno (57155 inhabitants)
55 Km E of Viterbo (67173 inhabitants)
60 Km W of L'Aquila (69753 inhabitants)
64 Km N of Guidonia Montecelio (88673 inhabitants)
65 Km SE of Perugia (166134 inhabitants)
69 Km N of Tivoli (56533 inhabitants)
79 Km N of Roma (2864731 inhabitants)
80 Km W of Teramo (54892 inhabitants)
95 Km NE of Civitavecchia (52991 inhabitants)
99 Km NE of Fiumicino (78395 inhabitants)
99 Km N of Velletri (53303 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 1.3 2024-09-20
08:58:17		 42.5793 12.7375 10 2024-09-20
09:04:20		 Sala Sismica INGV-Roma 131577061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-09-20 08:58:17 ± 0.14
Latitude 42.5793 ± 0.0099
Longitude 12.7375 ± 0.0061
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 131577061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1052
Semi-minor axis of confidence ellipse (meter) 487
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 179
Circular confidence region, given by single value of horizontal uncertainty (meter) 1050.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 194
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.56028
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 131577061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-09-20 09:04:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BARO.EHZ. 2024-09-20T08:58:37.48 3.0 undecidable manual S -0.24 0
IV.MML1.EHZ. 2024-09-20T08:58:36.94 0.3 undecidable manual S 18 62.1933 50 0.36 64
IV.FDMO.HHZ. 2024-09-20T08:58:35.84 0.3 undecidable manual S 29 58.0974 50 0.35 65
IV.ASSB.HHZ. 2024-09-20T08:58:34.13 3.0 undecidable manual S -0.17 0
IV.MML1.EHZ. 2024-09-20T08:58:28.41 0.3 undecidable manual P 18 62.1933 50 0.01 69
IV.FDMO.HHZ. 2024-09-20T08:58:27.81 1.0 positive manual P 29 58.0974 50 0.04 23
IV.MOMA.HHZ. 2024-09-20T08:58:27.39 0.3 undecidable manual S 331 28.3494 50 -0.16 71
IV.CESI.HNE. 2024-09-20T08:58:26.14 0.3 undecidable manual P 16 49.1175 50 -0.24 68
IV.LNSS.HHZ. 2024-09-20T08:58:26.10 0.3 undecidable manual S 84 24.8529 112 -0.42 68
IV.SMA1.EHZ. 2024-09-20T08:58:26.63 0.3 undecidable manual P 83 49.1175 50 0.25 68
IV.GAVE.HNZ. 2024-09-20T08:58:24.25 0.1 undecidable manual S 46 17.871 119 -0.07 99
IV.CESX.HHZ. 2024-09-20T08:58:22.65 0.3 undecidable manual S 285 12.7761 128 -0.17 73
IV.LNSS.HHZ. 2024-09-20T08:58:22.33 0.1 undecidable manual P 84 24.8529 112 -0.26 94
IV.MOMA.HHZ. 2024-09-20T08:58:22.87 0.3 undecidable manual P 331 28.3494 50 -0.32 69
IV.GAVE.HNZ. 2024-09-20T08:58:21.32 0.1 undecidable manual P 46 17.871 119 -0.01 100
IV.ARRO.EHZ. 2024-09-20T08:58:21.09 0.3 undecidable manual S 91 2.2977 167 0.34 72
IV.CESX.HHZ. 2024-09-20T08:58:20.55 0.3 undecidable manual P 285 12.7761 128 0.09 74
IV.ARRO.EHZ. 2024-09-20T08:58:19.55 0.1 negative manual P 91 2.2977 167 0.29 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHN. ML:1.2 0.00026700000000000004 0.46 AML other m 2024-09-20T08:58:21.30
IV.ARRO.EHE. ML:1.2 0.00027800000000000004 0.16 AML other m 2024-09-20T08:58:21.40
IV.CESX.HHE. ML:1.2 0.000163 1.36 AML other m 2024-09-20T08:58:22.08
IV.CESX.HHN. ML:1.2 0.0001825 1.46 AML other m 2024-09-20T08:58:22.16
IV.LNSS.HHE. ML:1.5 0.000207 0.84 AML other m 2024-09-20T08:58:26.42
IV.LNSS.HHN. ML:1.6 0.00024349999999999998 0.5 AML other m 2024-09-20T08:58:26.22
IV.MOMA.HHN. ML:1.0 0.00005685 0.64 AML other m 2024-09-20T08:58:27.66
IV.MOMA.HHE. ML:1.0 0.0000569 0.6 AML other m 2024-09-20T08:58:28.50
IV.FDMO.HHN. ML:1.3 0.000038650000000000004 1.86 AML other m 2024-09-20T08:58:36.96
IV.FDMO.HHE. ML:1.3 0.0000455 0.16 AML other m 2024-09-20T08:58:36.20
IV.MML1.EHN. ML:1.4 0.000053150000000000004 0.72 AML other m 2024-09-20T08:58:37.58
IV.MML1.EHE. ML:1.6 0.00008025 0.52 AML other m 2024-09-20T08:58:37.81
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