Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 20-12-2020 and time 19:09:45 (UTC) in region 2 km E Vicovaro (RM)

A magnitude ML 1.7 earthquake occured in region: 2 km E Vicovaro (RM), on

  • 20-12-2020 19:09:45 (UTC)
  • 20-12-2020 20:09:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.0070, 12.9140 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 3 925 5861
Saracinesco RM 3 185 6046
Roccagiovine RM 5 263 6309
Castel Madama RM 5 7399 13708
Ciciliano RM 6 1336 15044
San Polo dei Cavalieri RM 6 2992 18036
Anticoli Corrado RM 6 915 18951
Cineto Romano RM 6 601 19552
Roviano RM 7 1351 20903
Licenza RM 8 1011 21914
Marano Equo RM 9 779 22693
Cerreto Laziale RM 9 1118 23811
Marcellina RM 9 7280 31091
Riofreddo RM 9 781 31872
Arsoli RM 9 1586 33458
Percile RM 10 255 33713
Agosta RM 10 1765 35478
San Gregorio da Sassola RM 10 1619 37097
Gerano RM 10 1263 38360
Tivoli RM 11 56533 94893
Rocca Canterano RM 11 196 95089
Vallinfreda RM 11 283 95372
Casape RM 11 744 96116
Oricola AQ 11 1244 97360
Pisoniano RM 12 770 98130
Canterano RM 13 351 98481
Cervara di Roma RM 13 455 98936
Rocca di Botte AQ 13 856 99792
Vivaro Romano RM 13 182 99974
Poli RM 13 2418 102392
Monteflavio RM 14 1348 103740
Palombara Sabina RM 14 13269 117009
Rocca Santo Stefano RM 14 975 117984
Orvinio RI 14 405 118389
San Vito Romano RM 15 3273 121662
Guidonia Montecelio RM 16 88673 210335
Camerata Nuova RM 16 447 210782
Capranica Prenestina RM 16 351 211133
Turania RI 17 241 211374
Pereto AQ 17 682 212056
Moricone RM 17 2650 214706
Bellegra RM 17 2887 217593
Sant'Angelo Romano RM 17 5018 222611
Gallicano nel Lazio RM 17 6334 228945
Montorio Romano RM 17 1984 230929
Carsoli AQ 17 5396 236325
Pozzaglia Sabina RI 18 360 236685
Castel San Pietro Romano RM 18 902 237587
Subiaco RM 18 9074 246661
Rocca di Cave RM 18 377 247038
Collalto Sabino RI 18 442 247480
Scandriglia RI 19 3108 250588
Palestrina RM 19 21672 272260
Olevano Romano RM 19 6687 278947
Roiate RM 19 737 279684
Zagarolo RM 20 17843 297527
Genazzano RM 20 6036 303563

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km E of Tivoli (56533 inhabitants)
16 Km E of Guidonia Montecelio (88673 inhabitants)
37 Km NE of Velletri (53303 inhabitants)
38 Km E of Roma (2864731 inhabitants)
51 Km NE of Pomezia (62966 inhabitants)
51 Km NE of Aprilia (73446 inhabitants)
55 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)
66 Km NE of Anzio (54211 inhabitants)
81 Km SE of Viterbo (67173 inhabitants)
93 Km E of Civitavecchia (52991 inhabitants)
97 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 1.7 2020-12-20
19:09:45		 42.0072 12.9145 10 2021-02-26
14:56:17		 Bollettino Sismico Italiano INGV 86773791
Reviewed
Rev100 		ML 1.7 2020-12-20
19:09:45		 42.0102 12.9155 10 2020-12-20
19:18:38		 Sala Sismica INGV-Roma 85585151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-20 19:09:45 ± 0.06
Latitude 42.0072 ± 0.0027
Longitude 12.9145 ± 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 86773791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 308
Semi-minor axis of confidence ellipse (meter) 171
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 82
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) 48
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.05221
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 30
Type of magnitude ML
Reference to an origin 86773791
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-16 10:58:40

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 30
Type of magnitude ML
Reference to an origin 85585151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-20 19:18:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
SL.LJU.BHZ. 2020-12-20T19:11:36.22 3.0 undecidable manual Sn -1.62 0
GU.GSCL.HHZ. 2020-12-20T19:11:09.55 3.0 undecidable manual Sn 2.61 0
XK.GIZZ.HHZ. 2020-12-20T19:10:58.94 3.0 negative manual Pg 13.49 0
IV.BRSN.HNZ. 2020-12-20T19:10:53.44 3.0 undecidable manual Sn 0.12 0
IV.SPS2.HHZ. 2020-12-20T19:10:52.20 3.0 negative manual Pg 9.13 0
IV.TDS.HHZ. 2020-12-20T19:10:44.64 3.0 undecidable manual Pg 5.22 0
CR.STON.BHZ. 2020-12-20T19:10:40.34 3.0 undecidable manual Pn -0.53 0
IV.ASSB.HHZ. 2020-12-20T19:10:05.04 0.3 undecidable manual P 350 116.7942 50 -0.04 62
IV.CESI.HHZ. 2020-12-20T19:10:04.28 0.3 undecidable manual P 360 110.7003 50 0.14 62
IV.VVLD.HHZ. 2020-12-20T19:10:04.46 0.6 undecidable manual S 104 60.3951 50 0.09 46
IV.GIUL.HHZ. 2020-12-20T19:10:03.73 0.6 undecidable manual S 150 57.1983 50 0.22 45
IV.LATB.EHZ. 2020-12-20T19:10:03.16 0.3 undecidable manual S 176 57.0984 50 -0.32 66
IV.MOMA.HHZ. 2020-12-20T19:10:01.24 0.3 undecidable manual P 342 92.7405 50 -0.14 64
IV.SRES.HHZ. 2020-12-20T19:10:00.15 0.6 undecidable manual S 308 41.9247 50 0.72 40
IV.PTQR.HHZ. 2020-12-20T19:09:59.37 0.3 undecidable manual S 87 40.1265 50 0.43 66
IV.GUAR.HHZ. 2020-12-20T19:09:59.27 0.6 undecidable manual S 126 40.4262 50 0.24 46
IV.TOLF.HHZ. 2020-12-20T19:09:59.16 0.3 undecidable manual P 275 75.5688 50 0.42 62
IV.GAVE.EHZ. 2020-12-20T19:09:58.57 0.1 positive manual P 359 75.9684 50 -0.23 86
IV.SAMA.EHZ. 2020-12-20T19:09:58.14 0.6 undecidable manual S 227 36.6411 50 0.13 47
IV.LRP.EHZ. 2020-12-20T19:09:57.50 0.3 undecidable manual P 125 68.376 50 -0.13 67
IV.RDP.HHZ. 2020-12-20T19:09:57.18 0.6 undecidable manual S 212 32.1456 50 0.36 46
IV.ARRO.EHZ. 2020-12-20T19:09:57.41 0.3 undecidable manual P 349 64.5909 50 0.36 64
IV.FIAM.HHZ. 2020-12-20T19:09:56.97 0.3 undecidable manual S 30 33.4443 50 -0.18 71
IV.VVLD.HHZ. 2020-12-20T19:09:56.16 0.1 positive manual P 104 60.3951 50 -0.25 89
IV.VIVA.HHN. 2020-12-20T19:09:56.46 0.6 undecidable manual S 203 30.9468 50 -0.02 49
IV.GIUL.HHZ. 2020-12-20T19:09:55.63 0.1 positive manual P 150 57.1983 50 -0.27 89
IV.LATB.EHZ. 2020-12-20T19:09:55.54 0.3 undecidable manual P 176 57.0984 50 -0.34 66
IT.MMP1.HGZ. 2020-12-20T19:09:55.84 0.6 undecidable manual S 333 30.1476 50 -0.44 45
IV.SAMA.EHZ. 2020-12-20T19:09:53.12 0.3 undecidable manual P 227 36.6411 50 0.39 67
IV.SRES.HHZ. 2020-12-20T19:09:53.22 0.3 undecidable manual P 308 41.9247 50 -0.33 68
IV.GUAR.HHZ. 2020-12-20T19:09:53.14 0.3 undecidable manual P 126 40.4262 50 -0.18 70
IV.PTQR.HHZ. 2020-12-20T19:09:53.19 0.3 undecidable manual P 87 40.1265 50 -0.08 71
IV.FIAM.HHZ. 2020-12-20T19:09:52.14 0.1 negative manual P 30 33.4443 50 -0.09 96
IV.RCAV.EHZ. 2020-12-20T19:09:52.36 0.3 undecidable manual S 172 17.9709 119 -0.26 72
IV.RDP.HHZ. 2020-12-20T19:09:52.18 1.0 undecidable manual P 212 32.1456 50 0.14 24
IT.CSO1.HGZ. 2020-12-20T19:09:52.75 0.3 undecidable manual S 54 17.6712 119 0.21 72
IV.MTCE.HHZ. 2020-12-20T19:09:51.32 0.3 undecidable manual S 277 14.2746 125 -0.23 72
IT.MMP1.HGZ. 2020-12-20T19:09:51.40 0.3 undecidable manual P 333 30.1476 50 -0.33 69
IV.VIVA.HHN. 2020-12-20T19:09:51.84 1.0 undecidable manual P 203 30.9468 50 0 25
IV.RMP.HHZ. 2020-12-20T19:09:51.53 0.3 undecidable manual P 219 27.75 50 0.17 72
IT.CSO1.HGZ. 2020-12-20T19:09:49.93 0.3 undecidable manual P 54 17.6712 119 0.36 70
IV.MTCE.HHZ. 2020-12-20T19:09:49.06 0.1 positive manual P 277 14.2746 125 0.06 100
IV.RCAV.EHZ. 2020-12-20T19:09:49.86 0.3 undecidable manual P 172 17.9709 119 0.24 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTCE.HHE. ML:2.0 0.0011149999999999999 0.3 AML other m 2020-12-20T19:09:51.60
IV.MTCE.HHN. ML:1.9 0.0007575 0.62 AML other m 2020-12-20T19:09:51.64
IV.RCAV.EHE. ML:2.0 0.000829 0.36 AML other m 2020-12-20T19:09:54.40
IV.RCAV.EHN. ML:1.9 0.0007315 0.92 AML other m 2020-12-20T19:09:54.42
IV.RMP.HHE. ML:2.2 0.000857 0.34 AML other m 2020-12-20T19:09:57.64
IV.FIAM.HHN. ML:1.4 0.00010915 1.26 AML other m 2020-12-20T19:09:58.02
IV.PTQR.HHE. ML:1.7 0.00019250000000000002 0.18 AML other m 2020-12-20T19:09:59.89
IV.PTQR.HHN. ML:1.7 0.000191 1.72 AML other m 2020-12-20T19:09:59.90
IV.SRES.HHN. ML:1.4 0.00007865 1.52 AML other m 2020-12-20T19:10:01.76
IV.GUAR.HHE. ML:2.0 0.000323 1.08 AML other m 2020-12-20T19:10:01.74
IV.FIAM.HHE. ML:1.4 0.0001035 0.7 AML other m 2020-12-20T19:10:02.48
IV.RMP.HHN. ML:2.3 0.0009699999999999999 1.62 AML other m 2020-12-20T19:10:02.81
IV.SRES.HHE. ML:1.4 0.00008625 0.24 AML other m 2020-12-20T19:10:03.56
IV.GUAR.HHN. ML:1.8 0.000228 0.34 AML other m 2020-12-20T19:10:04.42
IV.GIUL.HHN. ML:1.5 0.0000766 0.96 AML other m 2020-12-20T19:10:06.06
IV.ARRO.EHE. ML:1.5 0.00006375 1.28 AML other m 2020-12-20T19:10:09.83
IV.GAVE.EHE. ML:1.8 0.00010475 0.38 AML other m 2020-12-20T19:10:09.66
IV.ARRO.EHN. ML:1.6 0.0000717 0.82 AML other m 2020-12-20T19:10:09.44
IV.GAVE.EHN. ML:2.0 0.00013550000000000001 1.66 AML other m 2020-12-20T19:10:10.11
IV.GIUL.HHE. ML:1.4 0.00005945 0.32 AML other m 2020-12-20T19:10:10.33
IV.TOLF.HHN. ML:1.6 0.00006620000000000001 0.44 AML other m 2020-12-20T19:10:11.38
IV.TOLF.HHE. ML:1.5 0.000050100000000000005 0.88 AML other m 2020-12-20T19:10:11.51
IV.VVLD.HHN. ML:1.6 0.00009135 0.38 AML other m 2020-12-20T19:10:12.19
IV.VVLD.HHE. ML:1.6 0.00007780000000000001 0.32 AML other m 2020-12-20T19:10:12.49
IV.MOMA.HHN. ML:1.7 0.0000555 0.58 AML other m 2020-12-20T19:10:14.94
IV.MOMA.HHE. ML:1.8 0.00006865 0.86 AML other m 2020-12-20T19:10:14.98
IV.CESI.HHN. ML:2.0 0.00007835000000000001 0.34 AML other m 2020-12-20T19:10:20.66
IV.CESI.HHE. ML:1.8 0.0000485 0.6 AML other m 2020-12-20T19:10:22.42
IV.ASSB.HHE. ML:1.8 0.00005255 0.52 AML other m 2020-12-20T19:10:27.58
IV.ASSB.HHN. ML:1.6 0.00003204999999999999 1.48 AML other m 2020-12-20T19:10:28.09
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