Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 20-12-2020 and time 00:33:43 (Italy) in region 2 km E Vicovaro (RM)

A magnitude ML 1.2 earthquake occured in region: 2 km E Vicovaro (RM), on

  • 19-12-2020 23:33:43 (UTC)
  • 20-12-2020 00:33:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.0100, 12.9090 at 10 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
Vicovaro RM 2 4019 4019
Mandela RM 3 917 4936
Sambuci RM 4 925 5861
Saracinesco RM 4 185 6046
Roccagiovine RM 5 263 6309
Castel Madama RM 5 7399 13708
San Polo dei Cavalieri RM 6 2992 16700
Ciciliano RM 6 1336 18036
Cineto Romano RM 7 601 18637
Anticoli Corrado RM 7 915 19552
Licenza RM 7 1011 20563
Roviano RM 7 1351 21914
Marcellina RM 9 7280 29194
Marano Equo RM 9 779 29973
Cerreto Laziale RM 9 1118 31091
Riofreddo RM 10 781 31872
Arsoli RM 10 1586 33458
Percile RM 10 255 33713
Tivoli RM 10 56533 90246
San Gregorio da Sassola RM 11 1619 91865
Agosta RM 11 1765 93630
Gerano RM 11 1263 94893
Vallinfreda RM 11 283 95176
Rocca Canterano RM 11 196 95372
Casape RM 12 744 96116
Oricola AQ 12 1244 97360
Pisoniano RM 12 770 98130
Canterano RM 13 351 98481
Vivaro Romano RM 13 182 98663
Monteflavio RM 13 1348 100011
Rocca di Botte AQ 13 856 100867
Cervara di Roma RM 13 455 101322
Palombara Sabina RM 14 13269 114591
Poli RM 14 2418 117009
Orvinio RI 14 405 117414
Rocca Santo Stefano RM 15 975 118389
Guidonia Montecelio RM 15 88673 207062
San Vito Romano RM 15 3273 210335
Moricone RM 16 2650 212985
Sant'Angelo Romano RM 16 5018 218003
Camerata Nuova RM 17 447 218450
Turania RI 17 241 218691
Montorio Romano RM 17 1984 220675
Capranica Prenestina RM 17 351 221026
Pereto AQ 17 682 221708
Gallicano nel Lazio RM 17 6334 228042
Bellegra RM 17 2887 230929
Carsoli AQ 17 5396 236325
Pozzaglia Sabina RI 17 360 236685
Castel San Pietro Romano RM 18 902 237587
Scandriglia RI 18 3108 240695
Rocca di Cave RM 18 377 241072
Collalto Sabino RI 18 442 241514
Subiaco RM 18 9074 250588
Palestrina RM 19 21672 272260
Olevano Romano RM 19 6687 278947
Montelibretti RM 20 5323 284270
Nerola RM 20 1926 286196
Roiate RM 20 737 286933
Zagarolo RM 20 17843 304776

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km E of Tivoli (56533 inhabitants)
15 Km E of Guidonia Montecelio (88673 inhabitants)
37 Km E of Roma (2864731 inhabitants)
38 Km N of Velletri (53303 inhabitants)
51 Km NE of Pomezia (62966 inhabitants)
51 Km NE of Aprilia (73446 inhabitants)
56 Km SW of L'Aquila (69753 inhabitants)
60 Km N of Latina (125985 inhabitants)
62 Km E of Fiumicino (78395 inhabitants)
65 Km SE of Terni (111501 inhabitants)
67 Km NE of Anzio (54211 inhabitants)
80 Km SE of Viterbo (67173 inhabitants)
93 Km E of Civitavecchia (52991 inhabitants)
98 Km SW of Teramo (54892 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 1.2 2020-12-19
23:33:43		 42.0097 12.9093 10 2021-02-26
14:56:11		 Bollettino Sismico Italiano INGV 85783501
Reviewed
Rev100 		ML 1.3 2020-12-19
23:33:43		 42.0048 12.9103 9 2020-12-19
23:48:10		 Sala Sismica INGV-Roma 85559171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-19 23:33:43 ± 0.04
Latitude 42.0097 ± 0.0018
Longitude 12.9093 ± 0.0036
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85783501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 239
Semi-minor axis of confidence ellipse (meter) 118
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 105
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 50
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 40
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) 0.12501
Epicentral distance of station farthest from the epicenter (degree) 1.04861
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 85783501
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-28 09:17:05

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 85559171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-19 23:48:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2020-12-19T23:34:02.83 0.6 undecidable manual P 350 116.3946 50 -0.15 40
IV.VVLD.HHZ. 2020-12-19T23:34:02.15 0.6 undecidable manual S 105 60.8946 50 -0.29 44
IV.GIUL.HHZ. 2020-12-19T23:34:01.71 0.6 undecidable manual S 150 57.5979 50 0.15 45
IV.LATB.EHZ. 2020-12-19T23:34:01.49 0.6 undecidable manual S 176 57.3981 50 0 47
IV.MOMA.HHZ. 2020-12-19T23:33:58.97 0.6 undecidable manual P 343 92.3409 50 -0.31 41
IV.SRES.HHZ. 2020-12-19T23:33:57.17 0.6 undecidable manual S 308 41.4252 50 -0.06 48
IV.SMA1.EHN. 2020-12-19T23:33:57.26 0.6 undecidable manual P 27 77.2671 50 0.32 42
IV.GUAR.HHZ. 2020-12-19T23:33:57.24 0.3 undecidable manual S 126 40.9257 50 0.13 70
IV.T1299.HNN. 2020-12-19T23:33:56.81 0.1 undecidable manual P 24 75.7686 50 0.1 89
IV.GAVE.EHZ. 2020-12-19T23:33:56.49 0.6 undecidable manual P 359 75.7686 50 -0.22 43
IV.SAMA.EHZ. 2020-12-19T23:33:56.18 0.3 undecidable manual S 226 36.5412 50 0.26 69
IV.CESX.HHE. 2020-12-19T23:33:56.01 0.1 undecidable manual P 338 71.4729 50 -0.05 90
IV.PTQR.HHZ. 2020-12-19T23:33:56.98 0.6 undecidable manual S 88 40.5261 50 -0.01 48
IV.CAMP.HHE. 2020-12-19T23:33:56.00 0.1 undecidable manual P 35 71.373 50 -0.03 91
IV.LNSS.HNZ. 2020-12-19T23:33:55.04 0.3 undecidable manual P 9 66.6777 50 -0.28 65
IV.ARRO.EHZ. 2020-12-19T23:33:55.07 0.1 undecidable manual P 349 64.2912 50 0.12 90
IV.VVLD.HHZ. 2020-12-19T23:33:54.16 0.3 undecidable manual P 105 60.8946 50 -0.27 66
IT.MMP1.HGZ. 2020-12-19T23:33:54.11 0.6 undecidable manual S 334 29.6481 50 0 49
IV.FIAM.HHZ. 2020-12-19T23:33:54.96 0.6 undecidable manual S 31 33.3444 50 -0.13 48
IV.RDP.HHZ. 2020-12-19T23:33:54.65 0.3 undecidable manual S 211 32.1456 50 -0.12 72
MN.AQU.HNN. 2020-12-19T23:33:53.76 0.1 undecidable manual P 47 55.7997 50 0.11 92
IV.LATB.EHZ. 2020-12-19T23:33:53.65 0.1 undecidable manual P 176 57.3981 50 -0.23 89
IV.GIUL.HHZ. 2020-12-19T23:33:53.63 0.3 undecidable manual P 150 57.5979 50 -0.29 66
IV.RMP.HHZ. 2020-12-19T23:33:53.59 0.3 undecidable manual S 218 27.6501 50 0.03 74
IV.GUAR.HHZ. 2020-12-19T23:33:51.20 0.3 undecidable manual P 126 40.9257 50 -0.15 70
IV.PTQR.HHZ. 2020-12-19T23:33:51.22 0.6 undecidable manual P 88 40.5261 50 -0.06 48
IV.LAV9.HNZ. 2020-12-19T23:33:51.64 0.6 undecidable manual P 205 40.7259 50 0.32 45
IV.SRES.HHZ. 2020-12-19T23:33:51.62 0.6 undecidable manual P 308 41.4252 50 0.19 46
IV.SAMA.EHZ. 2020-12-19T23:33:50.82 0.6 undecidable manual P 226 36.5412 50 0.16 47
IV.RDP.HHZ. 2020-12-19T23:33:50.28 0.3 undecidable manual P 211 32.1456 50 0.28 69
IV.VIVA.HHZ. 2020-12-19T23:33:50.10 0.1 undecidable manual P 202 30.9468 50 0.29 93
IV.RCAV.EHZ. 2020-12-19T23:33:50.32 0.3 undecidable manual S 171 18.2706 119 -0.39 69
IT.CSO1.HGZ. 2020-12-19T23:33:50.84 0.3 undecidable manual S 55 17.871 119 0.25 71
IV.FIAM.HHZ. 2020-12-19T23:33:50.08 0.6 undecidable manual P 31 33.3444 50 -0.1 48
IV.MTCE.HHZ. 2020-12-19T23:33:49.12 0.3 undecidable manual S 276 13.875 126 -0.3 71
IV.RMP.HHZ. 2020-12-19T23:33:49.14 0.6 undecidable manual P 218 27.6501 50 -0.17 48
IT.MMP1.HGZ. 2020-12-19T23:33:49.42 0.6 undecidable manual P 334 29.6481 50 -0.19 47
IT.CSO1.HGZ. 2020-12-19T23:33:47.89 0.3 undecidable manual P 55 17.871 119 0.3 71
IV.RCAV.EHZ. 2020-12-19T23:33:47.88 0.3 undecidable manual P 171 18.2706 119 0.23 72
IV.MTCE.HHZ. 2020-12-19T23:33:46.96 0.1 undecidable manual P 276 13.875 126 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTCE.HHE. ML:1.5 0.00029568825 0.256 AML other m 2020-12-19T23:33:49.54
IV.MTCE.HHN. ML:1.2 0.00017238475 0.2048 AML other m 2020-12-19T23:33:50.32
IV.RMP.HHE. ML:1.8 0.00035511905 0.32 AML other m 2020-12-19T23:33:55.86
IV.PTQR.HHN. ML:1.5 0.000115523265 0.2816 AML other m 2020-12-19T23:33:58.01
IV.PTQR.HHE. ML:1.3 0.00007716912000000001 0.2048 AML other m 2020-12-19T23:33:58.01
IV.RMP.HHN. ML:1.8 0.0003664904 0.3968 AML other m 2020-12-19T23:33:58.71
IV.FIAM.HHN. ML:1.0 0.000042458314999999994 0.32 AML other m 2020-12-19T23:33:58.79
IV.SRES.HHE. ML:0.9 0.00002705121 0.2816 AML other m 2020-12-19T23:33:59.13
IV.SRES.HHN. ML:0.9 0.00002685454 0.2048 AML other m 2020-12-19T23:33:59.75
IV.FIAM.HHE. ML:0.8 0.0000316921 1.36 AML other m 2020-12-19T23:33:59.12
IV.VVLD.HHE. ML:1.1 0.00002495755 0.1792 AML other m 2020-12-19T23:34:03.76
IV.GIUL.HHN. ML:1.1 0.000025404865 1.8464 AML other m 2020-12-19T23:34:04.03
IV.GIUL.HHE. ML:1.0 0.000021290389999999998 0.2176 AML other m 2020-12-19T23:34:04.93
IV.GAVE.EHE. ML:1.4 0.0000382971 0.3072 AML other m 2020-12-19T23:34:07.93
IV.GAVE.EHN. ML:1.5 0.000050905435 1.5008 AML other m 2020-12-19T23:34:08.97
IV.VVLD.HHN. ML:1.2 0.000032205620000000004 0.3584 AML other m 2020-12-19T23:34:10.09
IV.MOMA.HHN. ML:1.2 0.00001912945 0.2432 AML other m 2020-12-19T23:34:14.85
IV.MOMA.HHE. ML:1.2 0.000020784097 0.2048 AML other m 2020-12-19T23:34:15.74
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