Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 12-08-2023 and time 00:08:30 (UTC) in region 5 km W L'Aquila (AQ)

A magnitude ML 0.9 earthquake occured in region: 5 km W L'Aquila (AQ), on

  • 12-08-2023 00:08:30 (UTC)
  • 12-08-2023 02:08:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3740, 13.3410 at 9 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
Scoppito AQ 7 3727 73480
Pizzoli AQ 8 4326 77806
Lucoli AQ 9 1011 78817
Tornimparte AQ 10 3187 82004
Barete AQ 10 737 82741
Cagnano Amiterno AQ 13 1369 84110
Ocre AQ 15 1167 85277
Fossa AQ 15 721 85998
Capitignano AQ 17 665 86663
Poggio Picenze AQ 18 1136 87799
Sant'Eusanio Forconese AQ 18 394 88193
Montereale AQ 19 2581 90774
Rocca di Cambio AQ 20 533 91307
Villa Sant'Angelo AQ 20 424 91731

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km W of L'Aquila (69753 inhabitants)
44 Km SW of Teramo (54892 inhabitants)
61 Km E of Terni (111501 inhabitants)
64 Km NE of Tivoli (56533 inhabitants)
65 Km NE of Guidonia Montecelio (88673 inhabitants)
68 Km W of Chieti (51815 inhabitants)
68 Km W of Montesilvano (53738 inhabitants)
72 Km W of Pescara (121014 inhabitants)
83 Km SE of Foligno (57155 inhabitants)
89 Km NE of Roma (2864731 inhabitants)
89 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 0.9 2023-08-12
00:08:30		 42.3743 13.3408 9 2023-08-12
00:21:07		 Sala Sismica INGV-Roma 120040801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-12 00:08:30 ± 0.12
Latitude 42.3743 ± 0.0054
Longitude 13.3408 ± 0.0073
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 120040801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 624
Semi-minor axis of confidence ellipse (meter) 187
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 262
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.35523
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 120040801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-08-12 00:21:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SALB.HHZ. 2023-08-12T00:10:08.88 3.0 undecidable manual Sg 4.83 0
IV.AGST.EHZ. 2023-08-12T00:10:02.93 3.0 undecidable manual Pg 13.47 0
7C.SPAOL.HNZ. 2023-08-12T00:09:53.00 3.0 undecidable manual Pg 7.86 0
GU.POPM.HHZ. 2023-08-12T00:09:40.51 3.0 undecidable manual Sn 0.03 0
IV.FNVD.HHZ. 2023-08-12T00:09:37.02 3.0 undecidable manual Sn -0.86 0
IV.MOCO.HHZ. 2023-08-12T00:09:24.70 3.0 undecidable manual Sg 1.88 0
IV.GATE.HHZ. 2023-08-12T00:08:53.43 3.0 undecidable manual Pn -3.03 0
IV.MURB.HNZ. 2023-08-12T00:08:49.46 3.0 undecidable manual P -0.24 0
IV.SMA1.EHZ. 2023-08-12T00:08:41.01 0.3 undecidable manual S 359 28.4493 107 0.18 72
IV.FAGN.HHZ. 2023-08-12T00:08:39.50 0.6 undecidable manual S 121 23.2545 111 0.35 47
IV.T0110.HHZ. 2023-08-12T00:08:38.43 1.0 negative manual P 114 39.1275 50 0.17 24
IV.PTQR.HHZ. 2023-08-12T00:08:38.78 0.1 undecidable manual P 173 39.4272 50 0.49 88
IV.FIAM.HHZ. 2023-08-12T00:08:38.14 0.6 undecidable manual S 237 21.867 112 -0.53 45
IV.RM33.EHZ. 2023-08-12T00:08:37.71 0.6 undecidable manual S 325 18.1707 116 0.2 49
IV.GIGS.HHZ. 2023-08-12T00:08:37.91 0.6 undecidable manual S 65 20.868 113 -0.47 46
IV.CAMP.HHZ. 2023-08-12T00:08:37.94 0.6 undecidable manual S 17 18.7701 115 0.24 48
IV.SMA1.EHZ. 2023-08-12T00:08:36.46 1.0 undecidable manual P 359 28.4493 107 -0.01 25
IV.TERO.HHZ. 2023-08-12T00:08:36.86 0.6 undecidable manual P 38 34.9428 50 -0.75 40
IV.FIAM.HHZ. 2023-08-12T00:08:35.00 0.3 positive manual P 237 21.867 112 -0.22 72
IV.FAGN.HHZ. 2023-08-12T00:08:35.27 0.3 positive manual P 121 23.2545 111 -0.23 72
IV.CAMP.HHZ. 2023-08-12T00:08:34.72 0.1 undecidable manual P 17 18.7701 115 0.06 100
IV.RM33.EHZ. 2023-08-12T00:08:34.72 0.6 undecidable manual P 325 18.1707 116 0.17 49
IV.GIGS.HHZ. 2023-08-12T00:08:34.73 0.1 undecidable manual P 65 20.868 113 -0.32 94
MN.AQU.HNE. 2023-08-12T00:08:34.27 0.6 undecidable manual S 113 5.6943 147 0.12 51
MN.AQU.HNE. 2023-08-12T00:08:32.82 0.1 undecidable manual P 113 5.6943 147 0.21 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GIGS.HHE. ML:0.4 0.00002145 0.44 AML other m 2023-08-12T00:08:38.04
IV.GIGS.HHN. ML:0.3 0.00001565 1.1 AML other m 2023-08-12T00:08:38.29
IV.FIAM.HHE. ML:0.9 0.0000499 0.4 AML other m 2023-08-12T00:08:38.60
IV.RM33.EHE. ML:0.9 0.00006654999999999999 0.62 AML other m 2023-08-12T00:08:38.87
IV.FAGN.HHN. ML:1.3 0.0001315 0.58 AML other m 2023-08-12T00:08:39.70
IV.FIAM.HHN. ML:0.7 0.000032901465 0.22 AML other m 2023-08-12T00:08:39.70
IV.RM33.EHN. ML:0.7 0.00004433852 0.18 AML other m 2023-08-12T00:08:39.49
IV.SMA1.EHN. ML:1.1 0.0000673 0.38 AML other m 2023-08-12T00:08:42.39
IV.FAGN.HHE. ML:1.3 0.00011949999999999999 0.52 AML other m 2023-08-12T00:08:42.58
IV.SMA1.EHE. ML:1.1 0.0000633 0.8 AML other m 2023-08-12T00:08:42.27
IV.TERO.HHE. ML:0.9 0.00003460000000000001 0.78 AML other m 2023-08-12T00:08:43.96
IV.TERO.HHN. ML:0.9 0.00003045 1.36 AML other m 2023-08-12T00:08:45.26
IV.RM33.HNE. ML:1.1 0.000092776893 0.46 AML other m 2023-08-12T00:08:38.62
IV.RM33.HNN. ML:1.0 0.000090721895 0.51 AML other m 2023-08-12T00:08:45.22
IV.FIAM.HNE. ML:1.0 0.0000755603 2.07 AML other m 2023-08-12T00:08:40.10
IV.FIAM.HNN. ML:0.9 0.000061737765 0.39 AML other m 2023-08-12T00:08:39.50
IV.T0110.HHE. ML:0.9 0.000028901049999999997 0.3 AML other m 2023-08-12T00:08:49.09
IV.T0110.HHN. ML:0.9 0.00002866069 0.3 AML other m 2023-08-12T00:08:47.55
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