Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 27-12-2020 and time 06:22:07 (Italy) in region 4 km NE Collelongo (AQ)

A magnitude ML 1.8 earthquake occured in region: 4 km NE Collelongo (AQ), on

  • 27-12-2020 05:22:07 (UTC)
  • 27-12-2020 06:22:07 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.9110, 13.6220 at 15 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Collelongo AQ 4 1233 1233
Villavallelonga AQ 5 919 2152
Ortucchio AQ 5 1860 4012
Lecce nei Marsi AQ 6 1702 5714
Gioia dei Marsi AQ 8 1989 7703
Trasacco AQ 9 6246 13949
San Benedetto dei Marsi AQ 11 3909 17858
Bisegna AQ 11 223 18081
San Vincenzo Valle Roveto AQ 12 2347 20428
Civita d'Antino AQ 13 979 21407
Balsorano AQ 13 3569 24976
Ortona dei Marsi AQ 13 542 25518
Pescina AQ 13 4133 29651
Luco dei Marsi AQ 14 6079 35730
Morino AQ 15 1448 37178
Civitella Roveto AQ 16 3268 40446
Collarmele AQ 17 894 41340
Cerchio AQ 17 1635 42975
Canistro AQ 18 995 43970
Anversa degli Abruzzi AQ 18 341 44311
Pescasseroli AQ 18 2203 46514
Villalago AQ 18 568 47082
Pescosolido FR 18 1555 48637
Cocullo AQ 19 230 48867
Aielli AQ 19 1475 50342
Campoli Appennino FR 20 1725 52067

Municipalities with at least 50000 inhabitants

An earthquake occurred to
52 Km SE of L'Aquila (69753 inhabitants)
67 Km SW of Chieti (51815 inhabitants)
68 Km E of Tivoli (56533 inhabitants)
74 Km E of Velletri (53303 inhabitants)
75 Km E of Guidonia Montecelio (88673 inhabitants)
77 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)
94 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
Bulletin
Rev1000 		ML 1.8 2020-12-27
05:22:07		 41.9113 13.622 15 2021-02-26
14:56:13		 Bollettino Sismico Italiano INGV 85999861
Reviewed
Rev100 		ML 1.9 2020-12-27
05:22:07		 41.9098 13.6245 15 2020-12-27
05:27:17		 Sala Sismica INGV-Roma 85748991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-27 05:22:07 ± 0.06
Latitude 41.9113 ± 0.0027
Longitude 13.6220 ± 0.0036
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85999861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 350
Semi-minor axis of confidence ellipse (meter) 87
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 294
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 61
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.04137
Epicentral distance of station farthest from the epicenter (degree) 0.54229
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 85748991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-27 05:27:17

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 35
Type of magnitude ML
Reference to an origin 85999861
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-03 19:51:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MIDA.HHZ. 2020-12-27T05:22:26.40 0.3 undecidable manual S 120 60.1953 95 0.52 64
IV.MCI.EHZ. 2020-12-27T05:22:23.50 0.6 undecidable manual S 161 49.2174 96 0.54 43
IV.GIUL.HHZ. 2020-12-27T05:22:23.30 0.6 undecidable manual S 218 49.617 96 0.25 45
IV.CERA.HHZ. 2020-12-27T05:22:22.70 0.6 undecidable manual S 137 47.8188 96 0.12 47
IV.LIK.EHN.01 2020-12-27T05:22:22.60 0.6 undecidable manual S 186 45.9207 97 0.51 43
IV.LPEL.HHZ. 2020-12-27T05:22:22.50 0.6 undecidable manual S 72 48.618 96 -0.31 45
IV.T0110.HHZ. 2020-12-27T05:22:20.10 0.3 undecidable manual S 20 37.5291 99 0.24 70
IT.SULP.HGN. 2020-12-27T05:22:18.30 0.6 undecidable manual S 52 31.746 102 -0.03 49
IT.SULA.HNN. 2020-12-27T05:22:18.20 0.6 undecidable manual S 53 30.2475 103 0.25 47
IT.SULC.HNZ. 2020-12-27T05:22:17.90 0.3 undecidable manual S 54 29.3484 103 0.18 72
IV.LRP.EHZ. 2020-12-27T05:22:17.70 0.3 undecidable manual S 186 29.4483 103 -0.05 74
IV.MIDA.HHZ. 2020-12-27T05:22:17.70 0.1 undecidable manual P 120 60.1953 95 -0.33 88
IV.GUAR.HHZ. 2020-12-27T05:22:17.40 0.6 undecidable manual S 243 28.6491 104 -0.15 49
IV.GIGS.HHN. 2020-12-27T05:22:17.65 0.3 undecidable manual P 356 60.1953 95 -0.38 66
IV.LIK.EHN.01 2020-12-27T05:22:16.08 0.1 undecidable manual P 186 45.9207 97 0.24 92
IV.GIUL.HHZ. 2020-12-27T05:22:16.23 0.1 undecidable manual P 218 49.617 96 -0.17 93
MN.AQU.HNN. 2020-12-27T05:22:16.59 0.6 undecidable manual P 340 52.2033 96 -0.22 46
IV.INTR.HHZ. 2020-12-27T05:22:16.70 0.3 undecidable manual S 64 25.8519 106 -0.11 73
IV.MCI.EHZ. 2020-12-27T05:22:16.34 0.3 undecidable manual P 161 49.2174 96 0 72
IV.CERA.HHZ. 2020-12-27T05:22:15.83 0.1 undecidable manual P 137 47.8188 96 -0.29 90
IV.PTQR.HHZ. 2020-12-27T05:22:15.90 0.3 undecidable manual S 304 21.9669 110 0.06 74
IV.POFI.HHZ. 2020-12-27T05:22:15.80 0.3 undecidable manual S 161 22.755 109 -0.23 72
IV.LPEL.HHZ. 2020-12-27T05:22:15.91 0.3 undecidable manual P 72 48.618 96 -0.34 67
IT.OPI.HGZ. 2020-12-27T05:22:15.80 0.3 undecidable manual S 131 22.755 109 -0.24 71
IV.T0110.HHZ. 2020-12-27T05:22:14.56 0.3 undecidable manual P 20 37.5291 99 0.01 73
IV.LRP.EHZ. 2020-12-27T05:22:13.19 0.1 undecidable manual P 186 29.4483 103 -0.14 97
IT.SULA.HNN. 2020-12-27T05:22:13.73 0.3 undecidable manual P 53 30.2475 103 0.28 70
IT.SULC.HNZ. 2020-12-27T05:22:13.63 0.3 undecidable manual P 54 29.3484 103 0.31 70
IV.GUAR.HHZ. 2020-12-27T05:22:13.19 0.3 undecidable manual P 243 28.6491 104 -0.03 75
IT.SULP.HGN. 2020-12-27T05:22:13.76 0.3 undecidable manual P 52 31.746 102 0.09 73
IV.VVLD.HHZ. 2020-12-27T05:22:12.30 0.3 undecidable manual S 179 4.5954 159 -0.12 75
IV.POFI.HHZ. 2020-12-27T05:22:12.26 0.3 undecidable manual P 161 22.755 109 -0.08 74
IV.INTR.HHZ. 2020-12-27T05:22:12.80 0.1 undecidable manual P 64 25.8519 106 0.01 100
IT.OPI.HGZ. 2020-12-27T05:22:12.24 0.3 undecidable manual P 131 22.755 109 -0.11 74
IV.PTQR.HHZ. 2020-12-27T05:22:12.40 0.3 undecidable manual P 304 21.9669 110 0.17 73
IV.VVLD.HHZ. 2020-12-27T05:22:10.41 0.3 undecidable manual P 179 4.5954 159 0.15 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HNE. ML:0.0 0.001379377 0.16 AML other m 2020-12-27T05:22:12.62
IV.VVLD.HHE. ML:0.0 0.0014776284999999999 0.16 AML other m 2020-12-27T05:22:12.62
IV.VVLD.HNN. ML:0.0 0.0006572796 0.1504 AML other m 2020-12-27T05:22:12.57
IV.VVLD.HHN. ML:0.0 0.0007349059 0.16 AML other m 2020-12-27T05:22:12.57
IV.PTQR.HHE. ML:0.0 0.00022105675000000003 0.16 AML other m 2020-12-27T05:22:16.39
IV.POFI.HHN. ML:0.0 0.000143263805 0.1984 AML other m 2020-12-27T05:22:17.22
IV.POFI.HHE. ML:0.0 0.00030754824999999997 0.2784 AML other m 2020-12-27T05:22:16.29
IV.INTR.HNN. ML:0.0 0.0006968667500000001 0.1216 AML other m 2020-12-27T05:22:17.17
IV.INTR.HHN. ML:0.0 0.0007317608499999999 0.1216 AML other m 2020-12-27T05:22:17.17
IV.INTR.HHE. ML:0.0 0.0005891009 0.1376 AML other m 2020-12-27T05:22:17.49
IV.INTR.HNE. ML:0.0 0.00056296015 0.1568 AML other m 2020-12-27T05:22:17.48
IV.GUAR.HHE. ML:0.0 0.0002204314 0.2208 AML other m 2020-12-27T05:22:18.13
IV.PTQR.HHN. ML:0.0 0.00019411625 0.16 AML other m 2020-12-27T05:22:17.60
IV.GUAR.HHN. ML:0.0 0.00038539734999999995 0.2784 AML other m 2020-12-27T05:22:18.10
IV.LRP.EHE. ML:0.0 0.0005513843499999999 0.24 AML other m 2020-12-27T05:22:18.40
IV.LRP.EHN. ML:0.0 0.000058533985000000005 0.0832 AML other m 2020-12-27T05:22:18.81
IV.T0110.HHN. ML:0.0 0.0002868906 0.4 AML other m 2020-12-27T05:22:22.96
IV.T0110.HHE. ML:0.0 0.00030649999999999997 0.48 AML other m 2020-12-27T05:22:21.56
IV.LPEL.HNN. ML:0.0 0.00017640895000000002 0.1504 AML other m 2020-12-27T05:22:23.28
IV.LPEL.HHN. ML:0.0 0.0001964417 0.1408 AML other m 2020-12-27T05:22:24.21
IV.MCI.EHE. ML:0.0 0.00024236395 0.2784 AML other m 2020-12-27T05:22:24.18
IV.LPEL.HHE. ML:0.0 0.0002165 0.1 AML other m 2020-12-27T05:22:24.27
IV.LPEL.HNE. ML:0.0 0.00021557645 0.1088 AML other m 2020-12-27T05:22:24.27
IV.MCI.EHN. ML:0.0 0.00024883585 0.2208 AML other m 2020-12-27T05:22:24.62
IV.POFI.HNN. ML:1.6 0.00024279205 0.24 AML other m 2020-12-27T05:22:17.23
IV.POFI.HNE. ML:1.8 0.00040104244999999994 0.2912 AML other m 2020-12-27T05:22:16.30
IV.CERA.HHE. ML:1.6 0.00011740558500000001 0.3616 AML other m 2020-12-27T05:22:25.60
IV.CERA.HHN. ML:1.7 0.00013630676 0.5216 AML other m 2020-12-27T05:22:26.57
IV.CERA.HNE. ML:1.7 0.00012818115 0.4992 AML other m 2020-12-27T05:22:27.88
IV.CERA.HNN. ML:1.7 0.00013829171 0.5216 AML other m 2020-12-27T05:22:26.57
IV.GIUL.HHE. ML:1.5 0.00008633707 0.24 AML other m 2020-12-27T05:22:23.87
IV.GIUL.HHN. ML:1.6 0.00010501168499999999 0.1184 AML other m 2020-12-27T05:22:23.96
IV.MIDA.HNE. ML:1.4 0.000045627759999999994 0.1792 AML other m 2020-12-27T05:22:26.93
IV.MIDA.HHE. ML:1.4 0.00004528571500000001 0.24 AML other m 2020-12-27T05:22:28.01
IV.MIDA.HHN. ML:1.4 0.0000511925735 0.2816 AML other m 2020-12-27T05:22:26.69
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