Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 02-04-2023 and time 17:33:19 (UTC) in region 7 km NW Accumoli (RI)

A magnitude ML 1.3 earthquake occured in region: 7 km NW Accumoli (RI), on

  • 02-04-2023 17:33:19 (UTC)
  • 02-04-2023 19:33:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7320, 13.1710 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Accumoli RI 8 667 667
Norcia PG 9 4957 5624
Arquata del Tronto AP 11 1178 6802
Cittareale RI 13 482 7284
Cascia PG 13 3217 10501
Amatrice RI 15 2657 13158
Montegallo AP 18 523 13681
Castelsantangelo sul Nera MC 18 281 13962
Poggiodomo PG 19 117 14079
Preci PG 20 724 14803
Monteleone di Spoleto PG 20 599 15402

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of Teramo (54892 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
46 Km NW of L'Aquila (69753 inhabitants)
47 Km E of Terni (111501 inhabitants)
76 Km SE of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
89 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km W of Pescara (121014 inhabitants)
91 Km NE of Tivoli (56533 inhabitants)
92 Km W of Chieti (51815 inhabitants)
94 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
Bulletin
Rev1000 		ML 1.3 2023-04-02
17:33:19		 42.7317 13.1712 11 2024-03-01
17:18:03		 Bollettino Sismico Italiano INGV 116447711
Reviewed
Rev100 		ML 1.2 2023-04-02
17:33:19		 42.7277 13.186 10 2023-04-02
17:55:50		 Sala Sismica INGV-Roma 115977501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-02 17:33:19 ± 0.06
Latitude 42.7317 ± 0.0027
Longitude 13.1712 ± 0.0073
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 116447711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 570
Semi-minor axis of confidence ellipse (meter) 330
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 272
Circular confidence region, given by single value of horizontal uncertainty (meter) 570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 121
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.33635
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.0
Num. used stations 2
Type of magnitude ML
Reference to an origin 115977501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-02 17:55:50

ML:1.3

Field Value
Value 1.3
Uncertainty 0.5
Num. used stations 19
Type of magnitude ML
Reference to an origin 116447711
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-04-17 06:53:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FRON.EHZ. 2023-04-02T17:33:36.48 3.0 undecidable manual P 0.55 0
IV.TERO.HHZ. 2023-04-02T17:33:31.80 0.1 undecidable manual S 109 37.3293 90 -0.16 92
IV.RM33.EHZ. 2023-04-02T17:33:28.58 0.3 undecidable manual S 172 24.9528 90 -0.09 72
IV.MMO1.EHZ. 2023-04-02T17:33:28.00 0.3 undecidable manual S 34 22.4553 90 -0.01 73
7F.SIB1.EHE. 2023-04-02T17:33:27.17 0.3 undecidable manual S 24 19.7691 90 -0.12 72
IV.SMA1.EHZ. 2023-04-02T17:33:26.57 0.1 undecidable manual S 130 17.4714 90 -0.09 97
IV.LNSS.HNE. 2023-04-02T17:33:26.73 0.6 undecidable manual S 217 17.871 90 -0.03 49
IV.TERO.HHZ. 2023-04-02T17:33:26.60 0.1 undecidable manual P 109 37.3293 90 -0.11 93
7F.SIB3.EHE. 2023-04-02T17:33:26.51 0.1 undecidable manual S 27 17.871 90 -0.25 94
IV.NRCA.HHZ. 2023-04-02T17:33:25.06 0.6 undecidable manual S 338 12.1767 106 -0.21 48
7F.SIB1.EHE. 2023-04-02T17:33:24.19 0.1 undecidable manual P 24 19.7691 90 0.17 96
7F.SIB3.EHE. 2023-04-02T17:33:24.16 0.1 undecidable manual P 27 17.871 90 0.45 91
IV.MMO1.EHZ. 2023-04-02T17:33:24.43 0.1 undecidable manual P 34 22.4553 90 0 98
IV.RM33.EHZ. 2023-04-02T17:33:24.67 0.1 undecidable manual P 172 24.9528 90 -0.14 95
IV.SMA1.EHZ. 2023-04-02T17:33:23.86 0.1 undecidable manual P 130 17.4714 90 0.2 96
IV.LNSS.HNE. 2023-04-02T17:33:23.91 0.3 undecidable manual P 217 17.871 90 0.2 72
IV.NRCA.HHZ. 2023-04-02T17:33:22.88 0.1 undecidable manual P 338 12.1767 106 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.3 0.00019800000000000002 0.08 AML other m 2023-04-02T17:33:25.11
IV.NRCA.HHN. ML:1.2 0.0001704204 0.0768 AML other m 2023-04-02T17:33:25.11
IV.NRCA.HNE. ML:1.3 0.0002221314 0.0768 AML other m 2023-04-02T17:33:25.15
IV.NRCA.HNN. ML:1.3 0.0002139446 0.4352 AML other m 2023-04-02T17:33:25.18
IV.SMA1.EHN. ML:0.5 0.000024756845 1.0368 AML other m 2023-04-02T17:33:28.67
IV.MMO1.EHE. ML:0.4 0.000017372079999999998 1.7152 AML other m 2023-04-02T17:33:31.87
IV.MMO1.EHN. ML:0.5 0.000022242035 0.1536 AML other m 2023-04-02T17:33:28.09
IV.MMO1.HNE. ML:3.0 0.007497045 1.7024 AML other m 2023-04-02T17:33:32.07
IV.MMO1.HNN. ML:3.0 0.006310791 2.5216 AML other m 2023-04-02T17:33:29.54
IV.RM33.EHN. ML:0.5 0.000019668039999999998 2.7264 AML other m 2023-04-02T17:33:34.80
IV.RM33.HNN. ML:1.4 0.00015117429000000002 1.472 AML other m 2023-04-02T17:33:33.42
IV.RM33.EHE. ML:0.6 0.00002575818 1.9072 AML other m 2023-04-02T17:33:29.18
IV.RM33.HNE. ML:1.4 0.00014984669 0.704 AML other m 2023-04-02T17:33:33.41
IV.TERO.HNE. ML:1.5 0.00011064041999999999 0.8832 AML other m 2023-04-02T17:33:38.28
IV.TERO.HHN. ML:0.4 0.000007907814 0.1152 AML other m 2023-04-02T17:33:32.04
IV.TERO.HHE. ML:1.5 0.0001150595 0.9216 AML other m 2023-04-02T17:33:37.47
IV.TERO.HNN. ML:1.7 0.00020419490000000003 1.2544 AML other m 2023-04-02T17:33:31.56
IV.FRON.EHE. ML:1.4 0.000028365045 5.184 AML other m 2023-04-02T17:34:02.56
IV.FRON.EHN. ML:1.1 0.000016587695 2.5216 AML other m 2023-04-02T17:34:08.60
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