Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 09-12-2023 and time 18:19:25 (UTC) in region 3 km NW Acquasanta Terme (AP)

A magnitude ML 1.2 earthquake occured in region: 3 km NW Acquasanta Terme (AP), on

  • 09-12-2023 18:19:25 (UTC)
  • 09-12-2023 19:19:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7890, 13.3940 at 20 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
Acquasanta Terme AP 3 2916 2916
Montegallo AP 8 523 3439
Arquata del Tronto AP 8 1178 4617
Valle Castellana TE 10 977 5594
Roccafluvione AP 11 2010 7604
Venarotta AP 13 2066 9670
Palmiano AP 14 196 9866
Montemonaco AP 14 604 10470
Accumoli RI 16 667 11137
Rocca Santa Maria TE 16 537 11674
Ascoli Piceno AP 17 49407 61081
Montefortino FM 18 1178 62259
Comunanza AP 19 3166 65425
Amatrice RI 20 2657 68082
Folignano AP 20 9241 77323

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NW of Teramo (54892 inhabitants)
49 Km N of L'Aquila (69753 inhabitants)
59 Km E of Foligno (57155 inhabitants)
66 Km E of Terni (111501 inhabitants)
69 Km W of Montesilvano (53738 inhabitants)
76 Km W of Pescara (121014 inhabitants)
80 Km NW of Chieti (51815 inhabitants)
89 Km E of Perugia (166134 inhabitants)
93 Km S of Ancona (100861 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 2023-12-09
18:19:25		 42.7892 13.3938 20 2023-12-09
18:29:56		 Sala Sismica INGV-Roma 123923531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-12-09 18:19:25 ± 0.12
Latitude 42.7892 ± 0.0036
Longitude 13.3938 ± 0.0074
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 123923531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 587
Semi-minor axis of confidence ellipse (meter) 124
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 97
Circular confidence region, given by single value of horizontal uncertainty (meter) 590.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.12051
Epicentral distance of station farthest from the epicenter (degree) 0.33365
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 123923531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-12-09 18:29:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RM33.EHZ. 2023-12-09T18:19:37.63 0.6 undecidable manual S 205 34.3434 111 0.37 45
IV.FDMO.HHZ. 2023-12-09T18:19:37.95 0.6 undecidable manual S 318 37.0296 109 0.01 48
IV.MF5.EHZ. 2023-12-09T18:19:34.96 0.6 undecidable manual S 14 22.6551 123 0.49 45
IV.MC2.EHZ. 2023-12-09T18:19:34.65 0.6 undecidable manual S 309 21.4674 125 0.44 46
IV.NRCA.HHZ. 2023-12-09T18:19:34.51 0.6 undecidable manual S 282 23.2545 122 -0.1 49
IV.SMA1.EHZ. 2023-12-09T18:19:33.48 0.6 undecidable manual S 195 18.2706 130 -0.04 50
IV.RM33.EHZ. 2023-12-09T18:19:32.15 0.6 negative manual P 205 34.3434 111 -0.01 49
7F.SIB2.EHE. 2023-12-09T18:19:32.42 0.6 undecidable manual S 327 13.4754 140 -0.2 49
IV.FDMO.HHZ. 2023-12-09T18:19:32.44 1.0 negative manual P 318 37.0296 109 -0.12 24
7F.SIB3.EHE. 2023-12-09T18:19:32.64 0.6 undecidable manual S 313 13.875 139 -0.05 50
IV.CSP1.EHZ. 2023-12-09T18:19:32.48 0.6 positive manual P 335 36.9297 109 -0.06 48
IV.LNSS.HHE. 2023-12-09T18:19:32.42 0.6 undecidable manual P 234 35.4423 110 0.1 48
IV.GUMA.HHZ. 2023-12-09T18:19:31.81 0.1 positive manual P 351 30.747 114 0.17 96
IV.SMA1.EHZ. 2023-12-09T18:19:30.02 1.0 positive manual P 195 18.2706 130 0.02 25
IV.MC2.EHZ. 2023-12-09T18:19:30.32 0.1 undecidable manual P 309 21.4674 125 -0.08 98
IV.NRCA.HHZ. 2023-12-09T18:19:30.54 0.1 undecidable manual P 282 23.2545 122 -0.09 98
IV.MF5.EHZ. 2023-12-09T18:19:30.70 0.6 negative manual P 14 22.6551 123 0.15 49
IV.TERO.HHZ. 2023-12-09T18:19:30.78 0.6 undecidable manual P 137 25.1526 120 -0.1 49
IV.MMO1.EHZ. 2023-12-09T18:19:29.38 0.3 undecidable manual P 336 13.3755 140 -0.09 74
7F.SIB2.EHE. 2023-12-09T18:19:29.19 0.1 undecidable manual P 327 13.4754 140 -0.29 95
7F.SIB3.EHE. 2023-12-09T18:19:29.47 0.1 undecidable manual P 313 13.875 139 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.3 0.0001255 0.12 AML other m 2023-12-09T18:19:33.76
IV.SMA1.EHE. ML:1.2 0.00010155 0.12 AML other m 2023-12-09T18:19:33.88
IV.NRCA.HHE. ML:1.2 0.0000883 0.1 AML other m 2023-12-09T18:19:34.73
IV.NRCA.HHN. ML:1.2 0.00007735 0.1 AML other m 2023-12-09T18:19:34.74
IV.TERO.HHN. ML:0.0 0.000007115 1.18 AML other m 2023-12-09T18:19:42.71
IV.TERO.HHE. ML:0.5 0.0000128395555 0.064 AML other m 2023-12-09T18:19:36.29
IV.NRCA.HNE. ML:1.4 0.00011926304999999999 0.8192 AML other m 2023-12-09T18:19:41.67
IV.NRCA.HNN. ML:1.7 0.00022966609999999999 1.2544 AML other m 2023-12-09T18:19:32.57
IV.MF5.EHE. ML:1.0 0.000052014209 1.3696 AML other m 2023-12-09T18:19:32.79
IV.MF5.EHN. ML:0.9 0.00003944684499999999 0.2688 AML other m 2023-12-09T18:19:35.23
IV.TERO.HNE. ML:1.4 0.00012230145 1.1648 AML other m 2023-12-09T18:19:40.04
IV.TERO.HNN. ML:1.3 0.00010401245000000001 0.832 AML other m 2023-12-09T18:19:34.13
IV.GUMA.HHE. ML:1.3 0.000087496205 0.2944 AML other m 2023-12-09T18:19:37.25
IV.GUMA.HHN. ML:1.2 0.00006784296 0.0768 AML other m 2023-12-09T18:19:42.42
IV.GUMA.HNE. ML:1.4 0.00010777734999999999 0.2944 AML other m 2023-12-09T18:19:46.39
IV.GUMA.HNN. ML:1.6 0.00015862615000000003 0.6016 AML other m 2023-12-09T18:19:31.48
IV.RM33.HNE. ML:1.4 0.000097484045 0.704 AML other m 2023-12-09T18:19:40.33
IV.RM33.HNN. ML:1.5 0.000109094355 0.8832 AML other m 2023-12-09T18:19:40.35
IV.RM33.EHE. ML:0.7 0.00002087547 0.1536 AML other m 2023-12-09T18:19:38.41
IV.RM33.EHN. ML:0.7 0.000017775659999999997 0.1664 AML other m 2023-12-09T18:19:37.75
IV.FDMO.HHE. ML:0.6 0.000014249431 1.3184 AML other m 2023-12-09T18:19:32.54
IV.FDMO.HHN. ML:0.8 0.00001759743 1.152 AML other m 2023-12-09T18:19:36.47
IV.CSP1.EHE. ML:1.1 0.000046980494999999995 0.4608 AML other m 2023-12-09T18:19:35.82
IV.CSP1.EHN. ML:1.2 0.000051908805 0.2816 AML other m 2023-12-09T18:19:48.02
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