Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 11-08-2023 and time 02:30:09 (Italy) in region 5 km W L'Aquila (AQ)

A magnitude ML 1.2 earthquake occured in region: 5 km W L'Aquila (AQ), on

  • 11-08-2023 00:30:09 (UTC)
  • 11-08-2023 02:30:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3540, 13.3410 at 18 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
L'Aquila AQ 5 69753 69753
Lucoli AQ 7 1011 70764
Scoppito AQ 7 3727 74491
Tornimparte AQ 8 3187 77678
Pizzoli AQ 10 4326 82004
Barete AQ 12 737 82741
Ocre AQ 13 1167 83908
Fossa AQ 14 721 84629
Cagnano Amiterno AQ 15 1369 85998
Sant'Eusanio Forconese AQ 17 394 86392
Poggio Picenze AQ 17 1136 87528
Rocca di Cambio AQ 18 533 88061
Villa Sant'Angelo AQ 19 424 88485
Capitignano AQ 19 665 89150
San Demetrio ne' Vestini AQ 19 1854 91004
Borgorose RI 20 4591 95595

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km W of L'Aquila (69753 inhabitants)
45 Km SW of Teramo (54892 inhabitants)
61 Km E of Terni (111501 inhabitants)
62 Km NE of Tivoli (56533 inhabitants)
64 Km NE of Guidonia Montecelio (88673 inhabitants)
68 Km W of Chieti (51815 inhabitants)
69 Km W of Montesilvano (53738 inhabitants)
73 Km W of Pescara (121014 inhabitants)
85 Km SE of Foligno (57155 inhabitants)
87 Km NE of Roma (2864731 inhabitants)
88 Km NE 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 1.2 2023-08-11
00:30:09		 42.3538 13.3408 18 2023-08-11
00:34:36		 Sala Sismica INGV-Roma 120013481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-11 00:30:09 ± 0.18
Latitude 42.3538 ± 0.0081
Longitude 13.3408 ± 0.0097
Depth (km) 18 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 120013481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 799
Semi-minor axis of confidence ellipse (meter) 382
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 139
Circular confidence region, given by single value of horizontal uncertainty (meter) 800.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.33095
Number of stations at which the event was observed 10
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 20
Type of magnitude ML
Reference to an origin 120013481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-08-11 00:34:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2023-08-11T00:30:21.36 0.6 undecidable manual S 36 36.741 105 -0.38 60
IV.SMA1.EHZ. 2023-08-11T00:30:20.80 0.6 undecidable manual S 359 30.6471 109 0.61 58
IV.NRCA.HHZ. 2023-08-11T00:30:20.34 3.0 negative manual P 0.29 0
IV.CAMP.HHZ. 2023-08-11T00:30:18.03 0.3 undecidable manual S 15 20.9679 121 0.2 96
IV.FAGN.HHZ. 2023-08-11T00:30:18.87 0.3 undecidable manual S 116 22.1556 119 0.75 77
IV.GIGS.HHZ. 2023-08-11T00:30:17.73 0.3 undecidable manual S 60 21.9669 119 -0.34 94
IV.RM33.EHZ. 2023-08-11T00:30:17.94 0.3 undecidable manual S 329 20.0688 122 0.31 95
IV.FIAM.HNZ. 2023-08-11T00:30:17.55 0.6 undecidable manual S 243 20.6682 121 -0.22 63
IV.T0110.HHZ. 2023-08-11T00:30:17.60 3.0 negative manual P 0.43 0
IV.SMA1.EHZ. 2023-08-11T00:30:15.36 0.6 undecidable manual P 359 30.6471 109 -0.2 62
IV.TERO.HHZ. 2023-08-11T00:30:15.84 0.6 positive manual P 36 36.741 105 -0.61 56
MN.AQU.HNZ. 2023-08-11T00:30:14.63 0.6 undecidable manual S 90 5.2947 161 -0.47 62
IV.FAGN.HHZ. 2023-08-11T00:30:14.55 0.6 negative manual P 116 22.1556 119 0.19 63
IV.FIAM.HNZ. 2023-08-11T00:30:14.18 0.3 undecidable manual P 243 20.6682 121 0.02 100
IV.CAMP.HHZ. 2023-08-11T00:30:14.30 0.3 undecidable manual P 15 20.9679 121 0.11 98
IV.GIGS.HHZ. 2023-08-11T00:30:14.09 1.0 undecidable manual P 60 21.9669 119 -0.24 32
IV.RM33.EHZ. 2023-08-11T00:30:14.13 0.6 negative manual P 329 20.0688 122 0.05 66
MN.AQU.HNZ. 2023-08-11T00:30:12.47 0.3 undecidable manual P 90 5.2947 161 -0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CAMP.HHN. ML:1.0 0.000059518299999999996 0.4 AML other m 2023-08-11T00:30:18.28
IV.CAMP.HHE. ML:0.9 0.00005095 0.42 AML other m 2023-08-11T00:30:18.31
IV.RM33.EHE. ML:1.0 0.00005378937 0.22 AML other m 2023-08-11T00:30:18.24
IV.RM33.EHN. ML:1.0 0.000052637274999999997 0.16 AML other m 2023-08-11T00:30:18.86
IV.FAGN.HHE. ML:1.5 0.00016328605000000003 0.42 AML other m 2023-08-11T00:30:19.17
IV.FAGN.HHN. ML:1.6 0.0002055 0.42 AML other m 2023-08-11T00:30:20.41
IV.SMA1.EHE. ML:1.1 0.000050125249999999996 1.06 AML other m 2023-08-11T00:30:17.87
IV.TERO.HHE. ML:0.8 0.00002235355 0.14 AML other m 2023-08-11T00:30:22.26
IV.TERO.HHN. ML:0.8 0.0000223502025 0.34 AML other m 2023-08-11T00:30:25.22
IV.SMA1.EHN. ML:1.1 0.000048671710000000004 1.08 AML other m 2023-08-11T00:30:30.64
IV.RM33.HNE. ML:1.3 0.000113163195 0.55 AML other m 2023-08-11T00:30:18.52
IV.RM33.HNN. ML:1.3 0.00012170208500000001 0.39 AML other m 2023-08-11T00:30:23.29
IV.TERO.HNE. ML:1.6 0.0001324835 1.02 AML other m 2023-08-11T00:30:22.80
IV.TERO.HNN. ML:1.4 0.00008779476749999999 0.77 AML other m 2023-08-11T00:30:17.65
IV.T0110.HHE. ML:1.1 0.00004277726499999999 0.44 AML other m 2023-08-11T00:30:26.94
IV.T0110.HHN. ML:1.2 0.000060527655 0.84 AML other m 2023-08-11T00:30:33.44
IV.NRCA.HHE. ML:1.1 0.00002350464 0.14 AML other m 2023-08-11T00:30:29.57
IV.NRCA.HHN. ML:1.1 0.00002520568 0.84 AML other m 2023-08-11T00:30:40.91
IV.NRCA.HNE. ML:1.9 0.00016782645 0.87 AML other m 2023-08-11T00:30:27.49
IV.NRCA.HNN. ML:1.9 0.0001747833 0.96 AML other m 2023-08-11T00:30:39.02
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