Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 25-12-2021 and time 08:58:51 (UTC) in region 5 km S Scanno (AQ)

A magnitude ML 1.4 earthquake occured in region: 5 km S Scanno (AQ), on

  • 25-12-2021 08:58:51 (UTC)
  • 25-12-2021 09:58:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.8590, 13.8680 at 25 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 5 1847 1847
Pescasseroli AQ 9 2203 4050
Villalago AQ 9 568 4618
Opi AQ 9 420 5038
Villetta Barrea AQ 10 653 5691
Bisegna AQ 12 223 5914
Civitella Alfedena AQ 12 296 6210
Rocca Pia AQ 13 178 6388
Pettorano sul Gizio AQ 15 1376 7764
Barrea AQ 15 726 8490
Anversa degli Abruzzi AQ 16 341 8831
Rivisondoli AQ 17 700 9531
Pescocostanzo AQ 17 1128 10659
Introdacqua AQ 17 2126 12785
Lecce nei Marsi AQ 17 1702 14487
San Donato Val di Comino FR 17 2107 16594
Roccaraso AQ 18 1627 18221
Gioia dei Marsi AQ 18 1989 20210
Bugnara AQ 18 1125 21335
Scontrone AQ 19 574 21909
Ortona dei Marsi AQ 19 542 22451
Alfedena AQ 20 864 23315

Municipalities with at least 50000 inhabitants

An earthquake occurred to
60 Km SW of Chieti (51815 inhabitants)
67 Km SE of L'Aquila (69753 inhabitants)
73 Km SW of Pescara (121014 inhabitants)
77 Km SW of Montesilvano (53738 inhabitants)
89 Km E of Tivoli (56533 inhabitants)
90 Km S of Teramo (54892 inhabitants)
91 Km E of Latina (125985 inhabitants)
92 Km E of Velletri (53303 inhabitants)
95 Km NW of Caserta (76326 inhabitants)
96 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 1.4 2021-12-25
08:58:51		 41.859 13.868 25 2021-12-26
00:38:59		 Sala Sismica INGV-Roma 98985601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-25 08:58:51 ± 0.07
Latitude 41.8590 ± 0.0027
Longitude 13.8680 ± 0.0036
Depth (km) 25 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98985601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 329
Semi-minor axis of confidence ellipse (meter) 61
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 249
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.08723
Epicentral distance of station farthest from the epicenter (degree) 0.54769
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 23
Type of magnitude ML
Reference to an origin 98985601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-26 00:38:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIUL.HHE. 2021-12-25T08:59:11.06 0.6 undecidable manual S 237 60.7947 106 0.11 46
IV.VAGA.HHZ. 2021-12-25T08:59:10.29 0.6 undecidable manual S 148 57.7977 107 0.09 47
IV.FAGN.HHE. 2021-12-25T08:59:08.52 0.6 undecidable manual S 333 50.8158 109 0.1 47
IV.GUAR.HHZ. 2021-12-25T08:59:07.53 0.3 undecidable manual S 261 46.5201 112 0.19 69
IV.MCI.EHE. 2021-12-25T08:59:06.04 0.3 undecidable manual S 186 41.0256 115 0.03 72
IV.PTQR.HHE. 2021-12-25T08:59:06.54 0.6 undecidable manual S 295 42.624 114 0.16 46
IV.T0110.HHZ. 2021-12-25T08:59:06.07 0.6 undecidable manual S 350 41.8248 114 -0.11 48
IV.MIDA.HHZ. 2021-12-25T08:59:05.94 0.3 undecidable manual S 127 40.0266 115 0.19 71
IV.LRP.EHZ. 2021-12-25T08:59:04.41 0.3 undecidable manual S 225 33.1446 121 0.29 69
IV.LPEL.HHZ. 2021-12-25T08:59:04.23 0.6 undecidable manual S 51 33.3444 121 0.06 49
IV.CERA.HHZ. 2021-12-25T08:59:04.15 0.3 undecidable manual S 157 31.5462 122 0.39 69
IV.RNI2.HHZ. 2021-12-25T08:59:03.37 0.3 undecidable manual S 126 29.1486 125 0.13 73
IV.VAGA.HHZ. 2021-12-25T08:59:02.38 0.1 undecidable manual P 148 57.7977 107 -0.02 93
IV.GIUL.HHE. 2021-12-25T08:59:02.46 0.1 undecidable manual P 237 60.7947 106 -0.38 87
IT.SULC.HNE. 2021-12-25T08:59:02.14 0.3 undecidable manual S 8 23.4543 132 0.11 73
IT.SULP.HGZ. 2021-12-25T08:59:02.72 0.3 undecidable manual S 11 25.5522 129 0.26 71
IV.VVLD.HHZ. 2021-12-25T08:59:01.15 0.3 undecidable manual S 273 20.2686 136 -0.27 72
IV.POFI.HHZ. 2021-12-25T08:59:01.30 0.3 undecidable manual S 219 20.3685 136 -0.13 74
IV.FAGN.HHE. 2021-12-25T08:59:01.72 0.1 undecidable manual P 333 50.8158 109 0.34 89
IV.PTQR.HHE. 2021-12-25T08:59:00.11 0.1 undecidable manual P 295 42.624 114 -0.09 96
IV.T0110.HHZ. 2021-12-25T08:59:00.06 0.1 undecidable manual P 350 41.8248 114 -0.02 97
IV.GUAR.HHZ. 2021-12-25T08:59:00.99 0.1 undecidable manual P 261 46.5201 112 0.24 91
IV.MIDA.HHZ. 2021-12-25T08:58:59.60 0.1 positive manual P 127 40.0266 115 -0.23 92
IT.OPI.HGE. 2021-12-25T08:58:59.63 0.3 undecidable manual S 199 9.6792 156 -0.2 74
IV.MCI.EHE. 2021-12-25T08:58:59.97 0.3 undecidable manual P 186 41.0256 115 -0.01 73
IV.CERA.HHZ. 2021-12-25T08:58:58.56 0.1 undecidable manual P 157 31.5462 122 -0.12 96
IV.RNI2.HHZ. 2021-12-25T08:58:58.66 0.1 positive manual P 126 29.1486 125 0.28 94
IV.LRP.EHZ. 2021-12-25T08:58:58.75 0.1 negative manual P 225 33.1446 121 -0.14 96
IV.LPEL.HHZ. 2021-12-25T08:58:58.83 0.1 undecidable manual P 51 33.3444 121 -0.09 96
IT.SULP.HGZ. 2021-12-25T08:58:57.84 0.1 undecidable manual P 11 25.5522 129 -0.09 98
IV.VVLD.HHZ. 2021-12-25T08:58:57.17 0.1 negative manual P 273 20.2686 136 -0.16 98
IT.SULC.HNE. 2021-12-25T08:58:57.53 0.1 undecidable manual P 8 23.4543 132 -0.16 97
IV.POFI.HHZ. 2021-12-25T08:58:57.21 0.1 positive manual P 219 20.3685 136 -0.13 98
IT.OPI.HGE. 2021-12-25T08:58:56.28 0.1 positive manual P 199 9.6792 156 -0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HHN. ML:1.4 0.0001116 0.98 AML other m 2021-12-25T08:59:01.22
IV.VVLD.HHE. ML:1.3 0.0000918 0.48 AML other m 2021-12-25T08:59:01.54
IV.POFI.HHE. ML:1.2 0.0000702 1.08 AML other m 2021-12-25T08:59:03.29
IV.POFI.HHN. ML:1.1 0.000059499999999999996 0.46 AML other m 2021-12-25T08:59:03.66
IV.CERA.HHE. ML:1.5 0.0001036 0.52 AML other m 2021-12-25T08:59:04.51
IV.CERA.HNE. ML:1.4 0.00010165 0.76 AML other m 2021-12-25T08:59:04.51
IV.CERA.HHN. ML:1.5 0.00011665 0.5 AML other m 2021-12-25T08:59:05.12
IV.CERA.HNN. ML:1.6 0.0001235 1.6 AML other m 2021-12-25T08:59:05.14
IV.LRP.EHE. ML:1.4 0.00007999999999999999 0.82 AML other m 2021-12-25T08:59:07.11
IV.LRP.EHN. ML:0.9 0.00002525 0.6 AML other m 2021-12-25T08:59:07.88
IV.VVLD.HNE. ML:1.5 0.0001529923 0.6528 AML other m 2021-12-25T08:59:01.78
IV.VVLD.HNN. ML:1.5 0.00014439912499999999 0.6784 AML other m 2021-12-25T08:59:03.32
IV.RNI2.HHE. ML:1.5 0.000127600455 0.1408 AML other m 2021-12-25T08:59:05.23
IV.RNI2.HHN. ML:1.5 0.000123015205 0.2176 AML other m 2021-12-25T08:59:05.53
IV.RNI2.HNE. ML:1.5 0.00012038882 0.16 AML other m 2021-12-25T08:59:05.23
IV.RNI2.HNN. ML:1.5 0.00011927818500000001 0.2048 AML other m 2021-12-25T08:59:05.54
IV.LPEL.HHE. ML:1.2 0.000052841545 0.16 AML other m 2021-12-25T08:59:07.63
IV.LPEL.HHN. ML:1.2 0.0000485871 0.1408 AML other m 2021-12-25T08:59:07.03
IV.MIDA.HHE. ML:1.2 0.00004713238 0.3008 AML other m 2021-12-25T08:59:08.59
IV.MIDA.HHN. ML:1.4 0.00007487687 0.256 AML other m 2021-12-25T08:59:08.00
IV.MIDA.HNE. ML:1.5 0.00008262848 0.2624 AML other m 2021-12-25T08:59:08.71
IV.T0110.HHE. ML:1.3 0.000056681315 0.4416 AML other m 2021-12-25T08:59:11.03
IV.T0110.HHN. ML:1.3 0.000052555955 0.2432 AML other m 2021-12-25T08:59:07.77
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