Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 05-05-2023 and time 09:21:30 (UTC) in region 5 km SW Arrone (TR)

A magnitude ML 1.2 earthquake occured in region: 5 km SW Arrone (TR), on

  • 05-05-2023 09:21:30 (UTC)
  • 05-05-2023 11:21:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5500, 12.7390 at 7 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 5 2763 2763
Labro RI 6 374 3137
Montefranco TR 6 1276 4413
Colli sul Velino RI 7 533 4946
Terni TR 8 111501 116447
Morro Reatino RI 8 373 116820
Stroncone TR 8 4917 121737
Ferentillo TR 9 1913 123650
Polino TR 10 233 123883
Rivodutri RI 10 1253 125136
Greccio RI 11 1558 126694
Poggio Bustone RI 13 2055 128749
Contigliano RI 16 3783 132532
Configni RI 16 633 133165
Cantalice RI 16 2755 135920
Cottanello RI 16 563 136483
San Gemini TR 17 5018 141501
Leonessa RI 19 2435 143936
Narni TR 19 19785 163721
Montasola RI 19 395 164116
Rieti RI 19 47698 211814
Scheggino PG 20 461 212275
Vacone RI 20 256 212531

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km E of Terni (111501 inhabitants)
45 Km S of Foligno (57155 inhabitants)
54 Km E of Viterbo (67173 inhabitants)
58 Km W of L'Aquila (69753 inhabitants)
61 Km N of Guidonia Montecelio (88673 inhabitants)
65 Km N of Tivoli (56533 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
76 Km N of Roma (2864731 inhabitants)
80 Km W of Teramo (54892 inhabitants)
93 Km NE of Civitavecchia (52991 inhabitants)
96 Km NE of Fiumicino (78395 inhabitants)
96 Km N of Velletri (53303 inhabitants)
100 Km N of Pomezia (62966 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 1.2 2023-05-05
09:21:30		 42.5495 12.7392 7 2023-05-05
09:28:23		 Sala Sismica INGV-Roma 117045851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-05 09:21:30 ± 0.32
Latitude 42.5495 ± 0.0180
Longitude 12.7392 ± 0.0110
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 117045851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1995
Semi-minor axis of confidence ellipse (meter) 873
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 180
Circular confidence region, given by single value of horizontal uncertainty (meter) 2000.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 222
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.54949
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 19
Type of magnitude ML
Reference to an origin 117045851
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-05 09:28:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.POPM.HHZ. 2023-05-05T09:22:10.90 3.0 positive manual Pg 3.75 0
IV.GATE.HHZ. 2023-05-05T09:22:05.83 3.0 negative manual Pn -0.06 0
IV.FDMO.HHZ. 2023-05-05T09:21:50.11 0.6 undecidable manual S 28 60.9945 50 0.03 62
IV.RCAV.EHZ. 2023-05-05T09:21:48.19 3.0 negative manual P -0.05 0
IV.CESI.HHZ. 2023-05-05T09:21:47.80 0.3 undecidable manual S 15 52.3032 50 0.05 95
IV.FOSV.EHZ. 2023-05-05T09:21:47.36 3.0 undecidable manual P 1.06 0
IV.NRCA.HHZ. 2023-05-05T09:21:45.69 0.6 undecidable manual S 44 43.9227 50 0.17 62
IV.FDMO.HHZ. 2023-05-05T09:21:41.50 0.6 undecidable manual P 28 60.9945 50 -0.28 59
IV.CESI.HHZ. 2023-05-05T09:21:40.15 0.3 positive manual P 15 52.3032 50 -0.28 90
IV.GAVE.EHZ. 2023-05-05T09:21:38.58 0.6 undecidable manual S 39 20.2686 109 0.71 56
IV.NRCA.HHZ. 2023-05-05T09:21:38.94 0.3 undecidable manual P 44 43.9227 50 -0.2 93
IV.CESX.HHZ. 2023-05-05T09:21:36.15 0.6 undecidable manual S 298 14.0748 116 0.27 64
IV.MOMA.HHZ. 2023-05-05T09:21:36.35 0.6 undecidable manual P 334 31.4463 103 -0.52 59
IV.LNSS.HHZ. 2023-05-05T09:21:36.11 0.3 undecidable manual P 76 25.2525 105 0.42 92
IV.GAVE.EHZ. 2023-05-05T09:21:34.67 0.3 undecidable manual P 39 20.2686 109 -0.05 100
IV.CESX.HHZ. 2023-05-05T09:21:34.00 0.3 undecidable manual P 298 14.0748 116 0.42 93
IV.ARRO.EHZ. 2023-05-05T09:21:32.48 0.6 undecidable manual S 33 3.8961 151 -0.73 57
IV.ARRO.EHZ. 2023-05-05T09:21:31.83 0.6 undecidable manual P 33 3.8961 151 -0.21 66
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:1.4 0.000313 0.34 AML other m 2023-05-05T09:21:36.76
IV.CESX.HHE. ML:1.3 0.00024572335 0.3776 AML other m 2023-05-05T09:21:36.76
IV.LNSS.HHE. ML:1.1 0.00007815 0.18 AML other m 2023-05-05T09:21:42.36
IV.LNSS.HHN. ML:1.2 0.00008777881 0.224 AML other m 2023-05-05T09:21:41.46
IV.NRCA.HHE. ML:0.9 0.00002615 0.48 AML other m 2023-05-05T09:21:46.64
IV.NRCA.HHN. ML:0.7 0.000016701800000000003 0.1664 AML other m 2023-05-05T09:21:48.51
IV.CESI.HHN. ML:1.3 0.000046399999999999996 0.36 AML other m 2023-05-05T09:21:48.80
IV.CESI.HHE. ML:1.2 0.000033849999999999996 0.26 AML other m 2023-05-05T09:21:48.68
IV.FDMO.HHE. ML:0.9 0.000013831409499999999 0.1984 AML other m 2023-05-05T09:21:52.00
IV.FDMO.HHN. ML:0.7 0.000011123471 0.1792 AML other m 2023-05-05T09:21:51.69
IV.ARRO.EHE. ML:0.0 0.002617863 0.0768 AML other m 2023-05-05T09:21:32.72
IV.ARRO.EHN. ML:0.0 0.0028343515 0.16 AML other m 2023-05-05T09:21:32.88
IV.LNSS.HNE. ML:1.3 0.00011178605 0.5568 AML other m 2023-05-05T09:21:46.02
IV.LNSS.HNN. ML:1.3 0.00013130245 0.5504 AML other m 2023-05-05T09:21:46.55
IV.MOMA.HHE. ML:1.1 0.00006109466 0.3392 AML other m 2023-05-05T09:21:43.60
IV.MOMA.HHN. ML:0.8 0.000027870224999999998 0.16 AML other m 2023-05-05T09:21:42.18
IV.MOMA.HNN. ML:1.4 0.00011594263999999999 0.7104 AML other m 2023-05-05T09:21:40.54
IV.NRCA.HNE. ML:1.7 0.00014515899 0.4544 AML other m 2023-05-05T09:21:49.93
IV.NRCA.HNN. ML:1.8 0.00020324545 0.992 AML other m 2023-05-05T09:21:50.56
IV.CESI.HNE. ML:1.6 0.00009851234999999999 0.4736 AML other m 2023-05-05T09:22:01.72
IV.CESI.HNN. ML:1.8 0.00014007935 0.9984 AML other m 2023-05-05T09:22:02.04
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