Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 27-12-2020 and time 06:25:04 (Italy) in region 4 km N Villavallelonga (AQ)

A magnitude ML 1.1 earthquake occured in region: 4 km N Villavallelonga (AQ), on

  • 27-12-2020 05:25:04 (UTC)
  • 27-12-2020 06:25:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.9070, 13.6300 at 15 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
Villavallelonga AQ 4 919 919
Collelongo AQ 4 1233 2152
Ortucchio AQ 6 1860 4012
Lecce nei Marsi AQ 6 1702 5714
Gioia dei Marsi AQ 8 1989 7703
Trasacco AQ 9 6246 13949
Bisegna AQ 11 223 14172
San Benedetto dei Marsi AQ 11 3909 18081
San Vincenzo Valle Roveto AQ 12 2347 20428
Balsorano AQ 13 3569 23997
Ortona dei Marsi AQ 13 542 24539
Civita d'Antino AQ 13 979 25518
Pescina AQ 14 4133 29651
Luco dei Marsi AQ 15 6079 35730
Morino AQ 15 1448 37178
Civitella Roveto AQ 17 3268 40446
Pescasseroli AQ 17 2203 42649
Collarmele AQ 17 894 43543
Villalago AQ 17 568 44111
Pescosolido FR 18 1555 45666
Anversa degli Abruzzi AQ 18 341 46007
Cerchio AQ 18 1635 47642
Canistro AQ 18 995 48637
Cocullo AQ 19 230 48867
Campoli Appennino FR 19 1725 50592
Aielli AQ 20 1475 52067

Municipalities with at least 50000 inhabitants

An earthquake occurred to
53 Km SE of L'Aquila (69753 inhabitants)
67 Km SW of Chieti (51815 inhabitants)
69 Km E of Tivoli (56533 inhabitants)
75 Km E of Velletri (53303 inhabitants)
75 Km E of Guidonia Montecelio (88673 inhabitants)
78 Km NE of Latina (125985 inhabitants)
79 Km SW of Pescara (121014 inhabitants)
80 Km SW of Montesilvano (53738 inhabitants)
84 Km S of Teramo (54892 inhabitants)
88 Km E of Aprilia (73446 inhabitants)
95 Km E of Roma (2864731 inhabitants)
97 Km E of Pomezia (62966 inhabitants)
97 Km NE of Anzio (54211 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 1.1 2020-12-27
05:25:04		 41.9072 13.6297 15 2020-12-27
06:51:12		 Sala Sismica INGV-Roma 85750291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-27 05:25:04 ± 0.06
Latitude 41.9072 ± 0.0027
Longitude 13.6297 ± 0.0048
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85750291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 369
Semi-minor axis of confidence ellipse (meter) 163
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 303
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 74
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 19
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.51171
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 85750291
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-27 06:51:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2020-12-27T05:25:23.77 3.0 undecidable manual P 0.09 0
IV.GIUL.HHE. 2020-12-27T05:25:20.29 0.3 undecidable manual S 219 49.617 95 0.22 68
IV.PTRJ.HNZ. 2020-12-27T05:25:20.28 3.0 undecidable manual P -0.06 0
IV.T0110.HHE. 2020-12-27T05:25:17.07 0.3 undecidable manual S 19 37.7289 98 0.15 70
IV.GUAR.HHZ. 2020-12-27T05:25:14.27 0.6 undecidable manual S 245 29.0487 102 -0.37 45
IV.LRP.EHZ. 2020-12-27T05:25:14.66 0.3 undecidable manual S 187 29.0487 102 0.02 73
IV.VCEL.EHN. 2020-12-27T05:25:14.54 0.1 undecidable manual P 18 56.7987 95 0.02 92
IV.PTQR.HHZ. 2020-12-27T05:25:13.08 0.3 undecidable manual S 304 22.755 108 0.06 73
IV.GIUL.HHE. 2020-12-27T05:25:13.11 0.1 undecidable manual P 219 49.617 95 -0.31 89
IV.INTR.HHZ. 2020-12-27T05:25:13.64 0.3 undecidable manual S 63 25.4523 105 -0.06 73
IV.POFI.HNZ. 2020-12-27T05:25:13.03 0.6 undecidable manual S 162 22.1556 109 0.18 48
IT.OPI.HGZ. 2020-12-27T05:25:12.84 0.3 undecidable manual S 131 22.0668 109 0.01 74
IV.T0110.HHE. 2020-12-27T05:25:11.50 0.1 undecidable manual P 19 37.7289 98 -0.1 95
IV.LRP.EHZ. 2020-12-27T05:25:10.25 0.1 undecidable manual P 187 29.0487 102 -0.03 97
IV.GUAR.HHZ. 2020-12-27T05:25:10.92 0.6 undecidable manual P 245 29.0487 102 0.64 42
IV.VVLD.HHZ. 2020-12-27T05:25:09.22 0.1 undecidable manual S 187 4.1958 160 -0.07 100
IT.OPI.HGZ. 2020-12-27T05:25:09.18 0.1 undecidable manual P 131 22.0668 109 -0.05 98
IV.PTQR.HHZ. 2020-12-27T05:25:09.30 0.1 undecidable manual P 304 22.755 108 -0.04 98
IV.INTR.HHZ. 2020-12-27T05:25:09.70 0.1 undecidable manual P 63 25.4523 105 -0.04 98
IV.POFI.HNZ. 2020-12-27T05:25:09.21 0.1 undecidable manual P 162 22.1556 109 -0.03 98
IV.VVLD.HHZ. 2020-12-27T05:25:07.33 0.1 negative manual P 187 4.1958 160 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HHE. ML:1.0 0.00011610845 0.1024 AML other m 2020-12-27T05:25:09.72
IV.VVLD.HHN. ML:1.2 0.00016794365 0.1408 AML other m 2020-12-27T05:25:09.37
IV.VVLD.HNE. ML:1.2 0.00016769023999999998 0.16 AML other m 2020-12-27T05:25:09.42
IV.VVLD.HNN. ML:1.1 0.00014777414999999998 0.1408 AML other m 2020-12-27T05:25:09.38
IV.PTQR.HHE. ML:0.8 0.0000374304905 0.1792 AML other m 2020-12-27T05:25:13.18
IV.PTQR.HHN. ML:0.8 0.000033292300000000006 0.24 AML other m 2020-12-27T05:25:16.29
IV.INTR.HNE. ML:1.3 0.000103392055 0.1696 AML other m 2020-12-27T05:25:14.36
IV.INTR.HNN. ML:1.6 0.00019621030000000001 0.3968 AML other m 2020-12-27T05:25:14.29
IV.INTR.HHE. ML:1.3 0.00010035591499999999 0.1408 AML other m 2020-12-27T05:25:14.36
IV.INTR.HHN. ML:1.4 0.000123036865 0.1408 AML other m 2020-12-27T05:25:14.05
IV.LRP.EHE. ML:1.4 0.00010504842 0.3392 AML other m 2020-12-27T05:25:15.27
IV.LRP.EHN. ML:0.5 0.000013545382 0.2016 AML other m 2020-12-27T05:25:15.68
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