Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 21-12-2020 and time 05:38:13 (UTC) in region 2 km SE Vicovaro (RM)

A magnitude ML 1.6 earthquake occured in region: 2 km SE Vicovaro (RM), on

  • 21-12-2020 05:38:13 (UTC)
  • 21-12-2020 06:38:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.0030, 12.9120 at 9 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
Sambuci RM 3 925 4944
Saracinesco RM 4 185 5129
Mandela RM 4 917 6046
Castel Madama RM 5 7399 13445
Ciciliano RM 5 1336 14781
Roccagiovine RM 5 263 15044
San Polo dei Cavalieri RM 6 2992 18036
Anticoli Corrado RM 7 915 18951
Cineto Romano RM 7 601 19552
Roviano RM 7 1351 20903
Licenza RM 8 1011 21914
Cerreto Laziale RM 9 1118 23032
Marano Equo RM 9 779 23811
Marcellina RM 9 7280 31091
Arsoli RM 10 1586 32677
San Gregorio da Sassola RM 10 1619 34296
Riofreddo RM 10 781 35077
Tivoli RM 10 56533 91610
Agosta RM 10 1765 93375
Gerano RM 10 1263 94638
Percile RM 10 255 94893
Rocca Canterano RM 11 196 95089
Casape RM 11 744 95833
Pisoniano RM 11 770 96603
Vallinfreda RM 12 283 96886
Oricola AQ 12 1244 98130
Canterano RM 13 351 98481
Poli RM 13 2418 100899
Cervara di Roma RM 13 455 101354
Rocca di Botte AQ 13 856 102210
Vivaro Romano RM 14 182 102392
Monteflavio RM 14 1348 103740
Rocca Santo Stefano RM 14 975 104715
Palombara Sabina RM 14 13269 117984
Orvinio RI 15 405 118389
San Vito Romano RM 15 3273 121662
Guidonia Montecelio RM 15 88673 210335
Capranica Prenestina RM 16 351 210686
Gallicano nel Lazio RM 16 6334 217020
Camerata Nuova RM 16 447 217467
Bellegra RM 17 2887 220354
Sant'Angelo Romano RM 17 5018 225372
Pereto AQ 17 682 226054
Moricone RM 17 2650 228704
Turania RI 17 241 228945
Montorio Romano RM 17 1984 230929
Castel San Pietro Romano RM 17 902 231831
Rocca di Cave RM 18 377 232208
Carsoli AQ 18 5396 237604
Subiaco RM 18 9074 246678
Pozzaglia Sabina RI 18 360 247038
Palestrina RM 18 21672 268710
Olevano Romano RM 19 6687 275397
Collalto Sabino RI 19 442 275839
Scandriglia RI 19 3108 278947
Roiate RM 19 737 279684
Zagarolo RM 19 17843 297527
Genazzano RM 20 6036 303563

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 NE of Velletri (53303 inhabitants)
37 Km E of Roma (2864731 inhabitants)
50 Km NE of Pomezia (62966 inhabitants)
50 Km NE of Aprilia (73446 inhabitants)
56 Km SW of L'Aquila (69753 inhabitants)
60 Km N of Latina (125985 inhabitants)
61 Km E of Fiumicino (78395 inhabitants)
66 Km SE of Terni (111501 inhabitants)
66 Km NE of Anzio (54211 inhabitants)
81 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 1.6 2020-12-21
05:38:13		 42.0033 12.9115 9 2021-02-26
14:56:14		 Bollettino Sismico Italiano INGV 86123161
Reviewed
Rev100 		ML 1.5 2020-12-21
05:38:13		 42.0038 12.8977 10 2020-12-21
05:44:26		 Sala Sismica INGV-Roma 85594401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-21 05:38:13 ± 0.06
Latitude 42.0033 ± 0.0027
Longitude 12.9115 ± 0.0048
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86123161

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 307
Semi-minor axis of confidence ellipse (meter) 283
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 274
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.60704
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 86123161
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-09 15:36:10

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 85594401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-21 05:44:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CR.STON.BHZ. 2020-12-21T05:40:02.96 3.0 undecidable manual Sg 10.53 0
IV.IVPL.HHZ. 2020-12-21T05:39:59.05 3.0 undecidable manual Sn -1.66 0
OT.TAR1.HHZ. 2020-12-21T05:39:54.43 3.0 undecidable manual Sn 2.77 0
IV.SBPO.HNZ. 2020-12-21T05:39:53.37 3.0 undecidable manual Sg 6 0
GU.GSCL.HHZ. 2020-12-21T05:39:43.46 3.0 undecidable manual Sg 7.5 0
IV.CET2.HHZ. 2020-12-21T05:39:06.44 3.0 undecidable manual Pn 1.18 0
IV.FOSV.EHZ. 2020-12-21T05:38:51.62 3.0 undecidable manual Sn -4.6 0
IV.FIR.HHZ. 2020-12-21T05:38:49.94 3.0 undecidable manual Pn 0.84 0
IV.FOSV.EHZ. 2020-12-21T05:38:39.89 3.0 undecidable manual P 2.83 0
IV.CPOZ.HHZ. 2020-12-21T05:38:37.31 3.0 positive manual Pn -2.01 0
IV.CSFT.HHZ. 2020-12-21T05:38:37.27 3.0 negative manual Pn -2.09 0
IV.CESI.HHZ. 2020-12-21T05:38:32.13 3.0 undecidable manual P -0.47 0
IV.LATB.EHZ. 2020-12-21T05:38:31.24 0.6 undecidable manual S 176 56.6988 50 -0.23 44
IV.MOMA.HHZ. 2020-12-21T05:38:29.52 3.0 negative manual P -0.37 0
IV.SRES.HHN. 2020-12-21T05:38:27.93 0.6 undecidable manual S 308 42.0246 50 0.38 44
IV.PTQR.HHZ. 2020-12-21T05:38:27.33 0.6 undecidable manual S 87 40.3263 50 0.22 46
IV.GUAR.HNN. 2020-12-21T05:38:27.10 1.0 undecidable manual S 125 40.4262 50 -0.02 24
IV.GAVE.EHZ. 2020-12-21T05:38:26.49 3.0 positive manual P -0.34 0
IV.FIAM.HHZ. 2020-12-21T05:38:25.14 0.3 undecidable manual S 30 33.8439 50 -0.24 69
IV.LNSS.HNZ. 2020-12-21T05:38:25.25 0.6 undecidable manual P 9 67.377 50 -0.24 43
IV.ARRO.EHZ. 2020-12-21T05:38:25.20 0.6 undecidable manual P 349 64.9905 50 0.07 45
IV.RDP.HHZ. 2020-12-21T05:38:24.87 0.3 undecidable manual S 212 31.6461 50 0.08 72
IV.VIVA.HHN. 2020-12-21T05:38:24.20 1.0 undecidable manual S 203 30.4473 107 -0.25 23
IV.GIUL.HHZ. 2020-12-21T05:38:23.63 0.6 positive manual P 150 56.9985 50 -0.26 44
IV.LATB.EHZ. 2020-12-21T05:38:23.43 0.6 undecidable manual P 176 56.6988 50 -0.42 43
IV.SRES.HHN. 2020-12-21T05:38:21.68 0.6 undecidable manual P 308 42.0246 50 0.1 47
IV.PTQR.HHZ. 2020-12-21T05:38:21.28 0.3 undecidable manual P 87 40.3263 50 -0.05 71
IV.GUAR.HNN. 2020-12-21T05:38:21.39 0.6 undecidable manual P 125 40.4262 50 0.05 47
IT.CSO1.HGE. 2020-12-21T05:38:20.78 0.3 undecidable manual S 53 18.1707 117 0.31 70
IV.RDP.HHZ. 2020-12-21T05:38:20.48 0.3 undecidable manual P 212 31.6461 50 0.49 66
IV.VIVA.HHN. 2020-12-21T05:38:20.02 0.3 undecidable manual P 203 30.4473 107 0.23 70
IV.RCAV.EHE. 2020-12-21T05:38:20.05 0.3 undecidable manual S 171 17.5713 117 -0.24 71
IV.FIAM.HHZ. 2020-12-21T05:38:19.98 0.6 undecidable manual P 30 33.8439 50 -0.35 45
IT.MMP1.HGE. 2020-12-21T05:38:19.71 0.6 undecidable manual P 334 30.3474 107 -0.08 48
IV.MTCE.HHZ. 2020-12-21T05:38:18.98 0.3 undecidable manual S 279 14.0748 123 -0.28 71
IV.RCAV.EHE. 2020-12-21T05:38:17.62 0.1 undecidable manual P 171 17.5713 117 0.23 95
IT.CSO1.HGE. 2020-12-21T05:38:17.39 1.0 undecidable manual P 53 18.1707 117 -0.1 24
IV.MTCE.HHZ. 2020-12-21T05:38:16.80 0.1 undecidable manual P 279 14.0748 123 0 100
IV.MA9.HHZ. 2020-12-21T05:38:10.19 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTCE.HHE. ML:1.7 0.000499 0.36 AML other m 2020-12-21T05:38:19.31
IV.MTCE.HHN. ML:1.5 0.00034550000000000005 0.4 AML other m 2020-12-21T05:38:19.15
IV.PTQR.HHN. ML:1.7 0.000154 0.3 AML other m 2020-12-21T05:38:27.76
IV.PTQR.HHE. ML:1.5 0.00010645 0.18 AML other m 2020-12-21T05:38:27.77
IV.FIAM.HHN. ML:1.2 0.00006459999999999998 0.44 AML other m 2020-12-21T05:38:28.55
IV.GIUL.HHN. ML:1.2 0.000036580105 0.16 AML other m 2020-12-21T05:38:33.79
IV.GIUL.HHE. ML:1.1 0.000031299999999999995 1.3 AML other m 2020-12-21T05:38:36.88
IV.GAVE.EHN. ML:1.6 0.0000632 0.34 AML other m 2020-12-21T05:38:37.73
IV.GAVE.EHE. ML:1.5 0.000044617175 0.32 AML other m 2020-12-21T05:38:37.69
IV.MOMA.HHN. ML:1.4 0.000032149999999999995 1.1 AML other m 2020-12-21T05:38:45.05
IV.MOMA.HHE. ML:1.4 0.0000303359 0.1792 AML other m 2020-12-21T05:38:45.78
IV.CESI.HHN. ML:1.6 0.000033799999999999995 0.32 AML other m 2020-12-21T05:38:48.79
IV.CESI.HHE. ML:1.4 0.000020298525 0.3616 AML other m 2020-12-21T05:38:50.25
IV.MOMA.HNN. ML:2.2 0.00016248470999999997 0.9888 AML other m 2020-12-21T05:38:49.14
IV.MOMA.HNE. ML:2.0 0.0001227525 0.7104 AML other m 2020-12-21T05:38:47.18
IV.CESI.HNN. ML:2.2 0.000150866675 1.152 AML other m 2020-12-21T05:38:48.74
IV.CESI.HNE. ML:2.2 0.00013220789500000002 0.7104 AML other m 2020-12-21T05:38:47.08
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