Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 01-05-2023 and time 15:13:21 (UTC) in region 7 km W Accumoli (RI)

A magnitude ML 1.1 earthquake occured in region: 7 km W Accumoli (RI), on

  • 01-05-2023 15:13:21 (UTC)
  • 01-05-2023 17:13:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7110, 13.1600 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Accumoli RI 8 667 667
Cittareale RI 10 482 1149
Norcia PG 11 4957 6106
Cascia PG 12 3217 9323
Arquata del Tronto AP 13 1178 10501
Amatrice RI 14 2657 13158
Monteleone di Spoleto PG 18 599 13757
Poggiodomo PG 18 117 13874

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km NW of L'Aquila (69753 inhabitants)
45 Km W of Teramo (54892 inhabitants)
45 Km E of Terni (111501 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
87 Km NE of Guidonia Montecelio (88673 inhabitants)
88 Km NE of Tivoli (56533 inhabitants)
91 Km W of Pescara (121014 inhabitants)
92 Km W of Chieti (51815 inhabitants)
92 Km E 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 1.1 2023-05-01
15:13:21		 42.7112 13.1598 10 2023-05-01
15:37:28		 Sala Sismica INGV-Roma 116941411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-01 15:13:21 ± 0.05
Latitude 42.7112 ± 0.0027
Longitude 13.1598 ± 0.0037
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 116941411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 308
Semi-minor axis of confidence ellipse (meter) 186
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 282
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.12680
Epicentral distance of station farthest from the epicenter (degree) 0.44426
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 116941411
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-01 15:37:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2023-05-01T15:13:34.33 0.3 undecidable manual S 351 36.5412 50 0.22 70
IV.MMO1.EHN. 2023-05-01T15:13:30.86 0.3 undecidable manual S 33 24.8529 112 -0.11 73
7F.SIB2.EHZ. 2023-05-01T15:13:30.24 0.3 undecidable manual S 30 23.1546 113 -0.17 72
IV.RM33.EHZ. 2023-05-01T15:13:30.17 0.1 undecidable manual S 169 22.8549 114 -0.15 97
IV.FIAM.HHE. 2023-05-01T15:13:30.63 0.3 undecidable manual P 184 49.3173 50 -0.18 69
IV.GAVE.HNZ. 2023-05-01T15:13:29.86 0.3 undecidable manual S 265 21.7671 115 -0.11 73
IV.MF5.EHE. 2023-05-01T15:13:29.72 0.1 undecidable manual P 38 39.2274 50 0.47 88
IV.MTRA.EHN. 2023-05-01T15:13:29.18 0.6 undecidable manual S 75 19.9689 117 -0.22 48
IV.CESI.HHZ. 2023-05-01T15:13:29.08 0.1 undecidable manual P 328 38.628 50 -0.09 96
7F.SIB3.EHZ. 2023-05-01T15:13:29.47 0.3 undecidable manual S 26 20.2686 116 -0.03 75
IV.LNSS.HHZ. 2023-05-01T15:13:28.09 0.3 undecidable manual S 219 15.4734 123 0.03 75
IV.SMA1.EHZ. 2023-05-01T15:13:28.75 0.3 undecidable manual S 122 16.872 121 0.28 71
IV.TERO.HHZ. 2023-05-01T15:13:28.56 0.3 undecidable manual P 105 37.5291 50 -0.44 67
IV.FDMO.HHZ. 2023-05-01T15:13:28.70 0.1 undecidable manual P 351 36.5412 50 -0.15 95
IV.NRCA.HHZ. 2023-05-01T15:13:27.61 0.6 undecidable manual S 345 14.0748 125 -0.04 50
IV.MMO1.EHN. 2023-05-01T15:13:27.02 0.1 undecidable manual P 33 24.8529 112 -0.01 99
7F.SIB2.EHZ. 2023-05-01T15:13:26.72 0.1 undecidable manual P 30 23.1546 113 0.01 100
IV.RM33.EHZ. 2023-05-01T15:13:26.61 0.1 undecidable manual P 169 22.8549 114 -0.05 99
7F.SIB3.EHZ. 2023-05-01T15:13:26.25 0.1 undecidable manual P 26 20.2686 116 0.06 99
IV.GAVE.HNZ. 2023-05-01T15:13:26.45 0.1 undecidable manual P 265 21.7671 115 -0.01 100
IV.MTRA.EHN. 2023-05-01T15:13:25.68 0.6 undecidable manual P 75 19.9689 117 -0.45 46
IV.NRCA.HHZ. 2023-05-01T15:13:25.24 0.1 undecidable manual P 345 14.0748 125 0.12 99
IV.LNSS.HHZ. 2023-05-01T15:13:25.49 0.1 undecidable manual P 219 15.4734 123 0.14 98
IV.SMA1.EHZ. 2023-05-01T15:13:25.98 0.1 undecidable manual P 122 16.872 121 0.39 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.2 0.00014350000000000002 0.1 AML other m 2023-05-01T15:13:27.71
IV.NRCA.HHE. ML:1.4 0.000239209 0.0896 AML other m 2023-05-01T15:13:28.29
IV.LNSS.HHE. ML:1.2 0.00014094443000000001 0.2176 AML other m 2023-05-01T15:13:28.29
IV.LNSS.HHN. ML:1.2 0.00014314825 0.1664 AML other m 2023-05-01T15:13:28.87
IV.SMA1.EHN. ML:0.7 0.00004405681 0.256 AML other m 2023-05-01T15:13:30.14
IV.SMA1.EHE. ML:0.8 0.000054661585 0.1536 AML other m 2023-05-01T15:13:29.43
IV.NRCA.HNE. ML:1.4 0.0002274576 0.1152 AML other m 2023-05-01T15:13:28.29
IV.NRCA.HNN. ML:1.2 0.00014858715 0.6144 AML other m 2023-05-01T15:13:34.49
IV.LNSS.HNE. ML:1.2 0.00013161065 0.2304 AML other m 2023-05-01T15:13:28.40
IV.LNSS.HNN. ML:1.2 0.00015300665 0.3072 AML other m 2023-05-01T15:13:28.59
IV.TERO.HHE. ML:0.6 0.00001540841 0.1664 AML other m 2023-05-01T15:13:35.20
IV.TERO.HHN. ML:0.6 0.000017360435 0.0768 AML other m 2023-05-01T15:13:34.41
IV.TERO.HNE. ML:1.4 0.000094642805 0.64 AML other m 2023-05-01T15:13:31.22
IV.TERO.HNN. ML:1.2 0.0000592823355 42.9184 AML other m 2023-05-01T15:13:27.97
IV.CESI.HHE. ML:0.6 0.000013331967 0.4224 AML other m 2023-05-01T15:13:40.35
IV.CESI.HHN. ML:0.8 0.000018465255 0.32 AML other m 2023-05-01T15:13:37.44
IV.CESI.HNE. ML:1.5 0.00011985124999999999 0.896 AML other m 2023-05-01T15:13:43.28
IV.CESI.HNN. ML:1.5 0.00012347805000000002 0.6272 AML other m 2023-05-01T15:13:43.07
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