Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 02-04-2023 and time 11:42:23 (UTC) in region 1 km NW Gioia dei Marsi (AQ)

A magnitude ML 0.9 earthquake occured in region: 1 km NW Gioia dei Marsi (AQ), on

  • 02-04-2023 11:42:23 (UTC)
  • 02-04-2023 13:42:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.9660, 13.6850 at 9 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
Gioia dei Marsi AQ 1 1989 1989
Ortucchio AQ 3 1860 3849
Lecce nei Marsi AQ 4 1702 5551
Ortona dei Marsi AQ 5 542 6093
San Benedetto dei Marsi AQ 7 3909 10002
Pescina AQ 7 4133 14135
Bisegna AQ 8 223 14358
Anversa degli Abruzzi AQ 10 341 14699
Cocullo AQ 11 230 14929
Collarmele AQ 12 894 15823
Villavallelonga AQ 12 919 16742
Trasacco AQ 12 6246 22988
Collelongo AQ 12 1233 24221
Cerchio AQ 13 1635 25856
Villalago AQ 13 568 26424
Goriano Sicoli AQ 15 569 26993
Aielli AQ 15 1475 28468
Bugnara AQ 16 1125 29593
Prezza AQ 16 945 30538
Castel di Ieri AQ 17 303 30841
Celano AQ 17 11017 41858
Luco dei Marsi AQ 18 6079 47937
Scanno AQ 18 1847 49784
Gagliano Aterno AQ 18 254 50038
Introdacqua AQ 18 2126 52164
Raiano AQ 19 2815 54979
Castelvecchio Subequo AQ 19 982 55961
Pescasseroli AQ 20 2203 58164
Civita d'Antino AQ 20 979 59143
San Vincenzo Valle Roveto AQ 20 2347 61490

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km SE of L'Aquila (69753 inhabitants)
59 Km SW of Chieti (51815 inhabitants)
71 Km SW of Pescara (121014 inhabitants)
72 Km SW of Montesilvano (53738 inhabitants)
73 Km E of Tivoli (56533 inhabitants)
77 Km S of Teramo (54892 inhabitants)
79 Km E of Guidonia Montecelio (88673 inhabitants)
81 Km E of Velletri (53303 inhabitants)
85 Km NE of Latina (125985 inhabitants)
95 Km E of Aprilia (73446 inhabitants)
100 Km E 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
Bulletin
Rev1000 		ML 0.9 2023-04-02
11:42:23		 41.966 13.6847 9 2024-03-01
17:18:04		 Bollettino Sismico Italiano INGV 116540711
Reviewed
Rev100 		ML 0.9 2023-04-02
11:42:23		 41.9692 13.6838 10 2023-04-02
12:13:15		 Sala Sismica INGV-Roma 115970541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-02 11:42:23 ± 0.06
Latitude 41.9660 ± 0.0036
Longitude 13.6847 ± 0.0048
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 116540711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 355
Semi-minor axis of confidence ellipse (meter) 335
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) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
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) 0.10702
Epicentral distance of station farthest from the epicenter (degree) 0.49373
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 116540711
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-01-09 14:43:59

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 115970541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-02 12:13:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIGS.HHN. 2023-04-02T11:42:41.58 0.6 undecidable manual S 350 54.8007 50 0.28 44
IV.GUAR.HHZ. 2023-04-02T11:42:36.50 0.6 undecidable manual S 238 36.1416 50 0.18 47
IV.LRP.EHE. 2023-04-02T11:42:35.99 0.6 undecidable manual S 193 36.3414 50 -0.37 45
IV.GIGS.HHN. 2023-04-02T11:42:34.35 0.3 undecidable manual P 350 54.8007 50 0.43 64
IV.T0110.HHZ. 2023-04-02T11:42:34.58 0.6 undecidable manual S 14 30.1476 50 -0.14 48
IV.POFI.HHZ. 2023-04-02T11:42:33.99 0.6 undecidable manual S 175 27.6501 109 0 49
IT.OPI.HGZ. 2023-04-02T11:42:33.60 0.6 undecidable manual S 150 24.2535 111 0.73 41
IV.PTQR.HHZ. 2023-04-02T11:42:32.91 0.6 undecidable manual S 285 24.2535 111 0.04 49
IV.LRP.EHE. 2023-04-02T11:42:31.11 0.3 undecidable manual P 193 36.3414 50 0.04 72
IV.INTR.HHZ. 2023-04-02T11:42:31.14 0.3 undecidable manual S 74 18.87 117 -0.01 75
IV.LPEL.HNE. 2023-04-02T11:42:31.64 0.6 undecidable manual P 78 42.0246 50 -0.31 45
IV.GUAR.HHZ. 2023-04-02T11:42:31.09 0.3 undecidable manual P 238 36.1416 50 0.04 72
IT.OPI.HGZ. 2023-04-02T11:42:29.15 0.3 undecidable manual P 150 24.2535 111 0.09 73
IV.POFI.HHZ. 2023-04-02T11:42:29.60 0.3 undecidable manual P 175 27.6501 109 -0.1 73
IV.T0110.HHZ. 2023-04-02T11:42:29.89 0.3 undecidable manual P 14 30.1476 50 -0.23 70
IV.VVLD.HHZ. 2023-04-02T11:42:28.89 0.6 undecidable manual S 205 11.877 129 -0.2 49
IV.PTQR.HHZ. 2023-04-02T11:42:28.97 0.3 undecidable manual P 285 24.2535 111 -0.09 73
IV.INTR.HHZ. 2023-04-02T11:42:27.99 0.1 undecidable manual P 74 18.87 117 -0.07 99
IV.VVLD.HHZ. 2023-04-02T11:42:26.81 0.1 undecidable manual P 205 11.877 129 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HHN. ML:1.1 0.00014350000000000002 0.32 AML other m 2023-04-02T11:42:29.34
IV.VVLD.HHE. ML:1.0 0.00010805979999999998 0.1408 AML other m 2023-04-02T11:42:29.52
IV.INTR.HHE. ML:1.1 0.000107035655 0.224 AML other m 2023-04-02T11:42:31.33
IV.INTR.HHN. ML:1.2 0.00012698062499999998 0.16 AML other m 2023-04-02T11:42:31.69
IV.PTQR.HHE. ML:0.7 0.00003227376499999999 0.16 AML other m 2023-04-02T11:42:34.17
IV.POFI.HHN. ML:0.4 0.000015745207000000002 0.5056 AML other m 2023-04-02T11:42:34.02
IV.PTQR.HHN. ML:0.6 0.000023593745 0.32 AML other m 2023-04-02T11:42:35.70
IV.POFI.HHE. ML:0.8 0.00003425168 0.4224 AML other m 2023-04-02T11:42:35.37
IV.T0110.HHN. ML:1.1 0.00006216319 0.3392 AML other m 2023-04-02T11:42:36.73
IV.T0110.HHE. ML:1.0 0.000043413229999999995 0.4032 AML other m 2023-04-02T11:42:38.70
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