Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 25-12-2021 and time 09:54:30 (UTC) in region 7 km SW Scanno (AQ)

A magnitude ML 1.3 earthquake occured in region: 7 km SW Scanno (AQ), on

  • 25-12-2021 09:54:30 (UTC)
  • 25-12-2021 10:54:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.8460, 13.8580 at 24 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
Scanno AQ 7 1847 1847
Pescasseroli AQ 7 2203 4050
Opi AQ 8 420 4470
Villetta Barrea AQ 10 653 5123
Villalago AQ 10 568 5691
Civitella Alfedena AQ 11 296 5987
Bisegna AQ 12 223 6210
Rocca Pia AQ 14 178 6388
Barrea AQ 15 726 7114
San Donato Val di Comino FR 16 2107 9221
Pettorano sul Gizio AQ 17 1376 10597
Lecce nei Marsi AQ 17 1702 12299
Anversa degli Abruzzi AQ 17 341 12640
Rivisondoli AQ 18 700 13340
Pescocostanzo AQ 18 1128 14468
Gioia dei Marsi AQ 18 1989 16457
Introdacqua AQ 18 2126 18583
Roccaraso AQ 18 1627 20210
Scontrone AQ 19 574 20784
Campoli Appennino FR 19 1725 22509
Alfedena AQ 19 864 23373
Villavallelonga AQ 19 919 24292
Settefrati FR 20 728 25020
Bugnara AQ 20 1125 26145
Pescosolido FR 20 1555 27700
Alvito FR 20 2713 30413
Ortona dei Marsi AQ 20 542 30955

Municipalities with at least 50000 inhabitants

An earthquake occurred to
62 Km SW of Chieti (51815 inhabitants)
68 Km SE of L'Aquila (69753 inhabitants)
75 Km SW of Pescara (121014 inhabitants)
78 Km SW of Montesilvano (53738 inhabitants)
89 Km E of Tivoli (56533 inhabitants)
90 Km E of Latina (125985 inhabitants)
91 Km S of Teramo (54892 inhabitants)
91 Km E of Velletri (53303 inhabitants)
94 Km NW of Caserta (76326 inhabitants)
95 Km E of Guidonia Montecelio (88673 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 1.3 2021-12-25
09:54:30		 41.8465 13.8578 24 2021-12-26
01:00:57		 Sala Sismica INGV-Roma 98985991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-25 09:54:30 ± 0.07
Latitude 41.8465 ± 0.0027
Longitude 13.8578 ± 0.0048
Depth (km) 24 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98985991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 400
Semi-minor axis of confidence ellipse (meter) 10
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 263
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.07285
Epicentral distance of station farthest from the epicenter (degree) 0.53420
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 98985991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-26 01:00:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIUL.HHN. 2021-12-25T09:54:49.55 0.6 undecidable manual S 238 59.2962 105 0.25 45
IV.VAGA.HNN. 2021-12-25T09:54:48.74 1.0 undecidable manual S 147 57.0984 106 0 23
IV.GUAR.HNE. 2021-12-25T09:54:46.18 0.6 undecidable manual S 263 45.4212 111 0.39 44
IV.T0110.HHE. 2021-12-25T09:54:45.23 0.3 undecidable manual S 351 43.0236 112 0.05 72
IV.MIDA.HHZ. 2021-12-25T09:54:44.28 0.3 undecidable manual S 125 39.9267 114 -0.13 71
IV.PTQR.HHE. 2021-12-25T09:54:44.68 0.3 undecidable manual S 297 42.4242 112 -0.36 67
IV.MCI.EHE. 2021-12-25T09:54:44.68 0.6 undecidable manual S 185 39.627 114 0.34 45
IV.LRP.EHZ. 2021-12-25T09:54:42.85 0.6 undecidable manual S 226 31.5462 121 0.43 45
IV.CERA.HNN. 2021-12-25T09:54:42.47 0.3 undecidable manual S 154 30.6471 122 0.25 70
IV.RNI2.HHE. 2021-12-25T09:54:41.97 0.3 undecidable manual S 123 29.0487 123 0.09 73
IT.SULA.HNE. 2021-12-25T09:54:41.44 0.3 undecidable manual S 11 25.6521 127 0.32 71
IT.SULC.HNZ. 2021-12-25T09:54:41.10 0.3 undecidable manual S 10 24.9528 128 0.13 73
IV.GIUL.HHN. 2021-12-25T09:54:41.32 0.1 undecidable manual P 238 59.2962 105 -0.06 93
IT.SULP.HGN. 2021-12-25T09:54:41.67 0.3 undecidable manual S 12 27.0507 125 0.24 71
IV.VAGA.HNN. 2021-12-25T09:54:40.96 0.1 undecidable manual P 147 57.0984 106 -0.09 93
IV.T0110.HHE. 2021-12-25T09:54:39.00 0.1 undecidable manual P 351 43.0236 112 0 96
IV.POFI.HHZ. 2021-12-25T09:54:39.94 0.3 undecidable manual S 220 18.6702 137 0.19 73
IV.GUAR.HNE. 2021-12-25T09:54:39.52 0.3 undecidable manual P 263 45.4212 111 0.17 69
IV.VVLD.HHN. 2021-12-25T09:54:39.70 0.3 undecidable manual S 278 19.5693 136 -0.2 72
IV.MIDA.HHZ. 2021-12-25T09:54:38.16 0.1 positive manual P 125 39.9267 114 -0.39 90
IV.PTQR.HHE. 2021-12-25T09:54:38.98 0.3 undecidable manual P 297 42.4242 112 0.06 71
IV.MCI.EHE. 2021-12-25T09:54:38.51 0.3 undecidable manual P 185 39.627 114 0 73
IT.OPI.HGZ. 2021-12-25T09:54:38.16 0.3 undecidable manual S 196 8.0808 159 -0.08 75
IV.CERA.HNN. 2021-12-25T09:54:37.10 0.1 undecidable manual P 154 30.6471 122 -0.19 95
IV.RNI2.HHE. 2021-12-25T09:54:37.26 0.1 positive manual P 123 29.0487 123 0.17 95
IV.LRP.EHZ. 2021-12-25T09:54:37.26 0.1 negative manual P 226 31.5462 121 -0.14 96
IT.SULP.HGN. 2021-12-25T09:54:36.82 0.3 undecidable manual P 12 27.0507 125 -0.01 74
IT.SULA.HNE. 2021-12-25T09:54:36.56 0.1 undecidable manual P 11 25.6521 127 -0.09 98
IT.SULC.HNZ. 2021-12-25T09:54:36.72 1.0 undecidable manual P 10 24.9528 128 0.15 24
IV.POFI.HHZ. 2021-12-25T09:54:35.83 0.1 positive manual P 220 18.6702 137 -0.03 100
IV.VVLD.HHN. 2021-12-25T09:54:35.74 0.1 negative manual P 278 19.5693 136 -0.21 96
IT.OPI.HGZ. 2021-12-25T09:54:34.80 0.1 undecidable manual P 196 8.0808 159 -0.19 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HHN. ML:1.4 0.00011030000000000001 1 AML other m 2021-12-25T09:54:40.78
IV.VVLD.HHE. ML:1.3 0.00009675000000000001 1.02 AML other m 2021-12-25T09:54:41.99
IV.MIDA.HHN. ML:1.4 0.00007135 0.24 AML other m 2021-12-25T09:54:46.69
IV.MIDA.HHE. ML:1.4 0.00008105 1.44 AML other m 2021-12-25T09:54:46.12
IV.POFI.HHE. ML:0.8 0.00003442159 0.2816 AML other m 2021-12-25T09:54:41.39
IV.POFI.HHN. ML:0.8 0.000032112250000000004 0.2816 AML other m 2021-12-25T09:54:41.36
IV.LRP.EHE. ML:1.1 0.00005070011500000001 0.2816 AML other m 2021-12-25T09:54:47.16
IV.LRP.EHN. ML:0.7 0.000019192609999999997 0.1856 AML other m 2021-12-25T09:54:46.47
IV.RNI2.HHE. ML:1.5 0.000113917445 0.1408 AML other m 2021-12-25T09:54:43.86
IV.RNI2.HHN. ML:1.4 0.00010136779 0.2368 AML other m 2021-12-25T09:54:44.20
IV.RNI2.HNE. ML:1.4 0.000106400305 0.16 AML other m 2021-12-25T09:54:43.87
IV.RNI2.HNN. ML:1.4 0.00010874619 0.2432 AML other m 2021-12-25T09:54:44.21
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