Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 22-12-2020 and time 00:04:49 (UTC) in region 2 km SE Vicovaro (RM)

A magnitude ML 1.1 earthquake occured in region: 2 km SE Vicovaro (RM), on

  • 22-12-2020 00:04:49 (UTC)
  • 22-12-2020 01:04:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.0040, 12.9110 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
Sambuci RM 3 925 4944
Mandela RM 3 917 5861
Saracinesco RM 4 185 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
Marcellina RM 9 7280 29194
Cerreto Laziale RM 9 1118 30312
Marano Equo RM 9 779 31091
Arsoli RM 10 1586 32677
Riofreddo RM 10 781 33458
San Gregorio da Sassola RM 10 1619 35077
Percile RM 10 255 35332
Tivoli RM 10 56533 91865
Agosta RM 10 1765 93630
Gerano RM 10 1263 94893
Rocca Canterano RM 11 196 95089
Casape RM 11 744 95833
Pisoniano RM 11 770 96603
Vallinfreda RM 11 283 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 13 182 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 15 88673 210335
Capranica Prenestina RM 16 351 210686
Camerata Nuova RM 16 447 211133
Gallicano nel Lazio RM 17 6334 217467
Sant'Angelo Romano RM 17 5018 222485
Bellegra RM 17 2887 225372
Moricone RM 17 2650 228022
Pereto AQ 17 682 228704
Turania RI 17 241 228945
Montorio Romano RM 17 1984 230929
Castel San Pietro Romano RM 18 902 231831
Carsoli AQ 18 5396 237227
Rocca di Cave RM 18 377 237604
Subiaco RM 18 9074 246678
Pozzaglia Sabina RI 18 360 247038
Palestrina RM 18 21672 268710
Collalto Sabino RI 19 442 269152
Olevano Romano RM 19 6687 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 1.1 2020-12-22
00:04:49		 42.0042 12.9112 10 2021-02-26
14:56:17		 Bollettino Sismico Italiano INGV 86831391
Reviewed
Rev100 		ML 1.0 2020-12-22
00:04:49		 42.0153 12.9207 9 2020-12-22
00:12:08		 Sala Sismica INGV-Roma 85611821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-22 00:04:49 ± 0.07
Latitude 42.0042 ± 0.0036
Longitude 12.9112 ± 0.0061
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86831391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 354
Semi-minor axis of confidence ellipse (meter) 348
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.12680
Epicentral distance of station farthest from the epicenter (degree) 0.84266
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 86831391
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-16 11:41:22

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 85611821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-22 00:12:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HNZ. 2020-12-22T00:05:17.54 1.0 undecidable manual S 343 93.0402 50 0.55 20
IV.GAVE.EHN. 2020-12-22T00:05:12.84 0.6 undecidable manual S 359 76.368 50 0.3 43
IV.LRP.EHN. 2020-12-22T00:05:10.95 0.6 undecidable manual S 125 68.4759 50 0.52 42
IV.VVLD.HHZ. 2020-12-22T00:05:08.25 1.0 undecidable manual S 104 60.5949 50 -0.09 23
IV.LATB.EHZ. 2020-12-22T00:05:07.33 1.0 undecidable manual S 176 56.7987 50 0.02 24
IV.GIUL.HHZ. 2020-12-22T00:05:07.30 0.6 undecidable manual S 150 56.9985 50 -0.09 47
IV.MOMA.HNZ. 2020-12-22T00:05:05.27 0.3 undecidable manual P 343 93.0402 50 -0.05 66
IV.NRCA.HHZ. 2020-12-22T00:05:05.37 0.3 undecidable manual P 10 93.5397 50 -0.02 66
IV.T1299.HNN. 2020-12-22T00:05:04.01 0.6 undecidable manual P 23 76.2681 50 1.28 29
IV.SMA1.EHN. 2020-12-22T00:05:03.39 0.1 undecidable manual P 26 77.6667 50 0.43 83
IV.PTQR.HHZ. 2020-12-22T00:05:03.19 0.3 undecidable manual S 87 40.4262 50 0.25 70
IV.LAV9.HHZ. 2020-12-22T00:05:02.70 1.0 undecidable manual S 206 40.2264 50 -0.2 23
IV.GAVE.EHN. 2020-12-22T00:05:02.42 0.3 undecidable manual P 359 76.368 50 -0.33 64
IV.LRP.EHN. 2020-12-22T00:05:01.40 0.3 undecidable manual P 125 68.4759 50 -0.13 68
IV.LNSS.HNZ. 2020-12-22T00:05:01.19 0.6 undecidable manual P 9 67.2771 50 -0.16 45
IV.POFI.HNE. 2020-12-22T00:05:01.96 0.1 undecidable manual P 115 73.371 50 -0.34 86
IV.SAMA.EHZ. 2020-12-22T00:05:01.70 0.6 undecidable manual S 227 36.1416 50 -0.12 48
IV.FIAM.HHZ. 2020-12-22T00:05:00.70 0.3 undecidable manual S 30 33.8439 50 -0.49 67
IV.RDP.HHZ. 2020-12-22T00:05:00.80 0.6 undecidable manual S 212 31.746 50 0.17 48
IV.VVLD.HHZ. 2020-12-22T00:05:00.03 0.3 undecidable manual P 104 60.5949 50 -0.29 66
IV.LATB.EHZ. 2020-12-22T00:04:59.39 0.3 undecidable manual P 176 56.7987 50 -0.34 66
IV.GIUL.HHZ. 2020-12-22T00:04:59.47 0.1 undecidable manual P 150 56.9985 50 -0.3 89
IV.SRES.HHN. 2020-12-22T00:04:57.29 0.6 undecidable manual P 308 41.9247 50 -0.15 47
IV.PTQR.HHZ. 2020-12-22T00:04:57.12 0.1 undecidable manual P 87 40.4262 50 -0.09 96
IV.LAV9.HHZ. 2020-12-22T00:04:57.71 0.3 undecidable manual P 206 40.2264 50 0.53 65
IT.CSO1.HGZ. 2020-12-22T00:04:56.62 0.6 undecidable manual S 54 18.0708 118 0.14 49
IV.SAMA.EHZ. 2020-12-22T00:04:56.69 0.3 undecidable manual P 227 36.1416 50 0.13 72
IV.RCAV.EHZ. 2020-12-22T00:04:56.30 0.6 undecidable manual S 171 17.6712 119 -0.04 50
IV.RDP.HHZ. 2020-12-22T00:04:56.45 0.6 undecidable manual P 212 31.746 50 0.58 43
IV.RMP.HHZ. 2020-12-22T00:04:55.20 1.0 undecidable manual P 219 27.2505 109 0.03 25
IV.FIAM.HHZ. 2020-12-22T00:04:55.88 0.1 undecidable manual P 30 33.8439 50 -0.31 93
IV.MTCE.HHZ. 2020-12-22T00:04:54.90 0.3 undecidable manual S 278 14.0748 124 -0.38 71
IV.RCAV.EHZ. 2020-12-22T00:04:53.50 0.1 undecidable manual P 171 17.6712 119 0.11 100
IT.CSO1.HGZ. 2020-12-22T00:04:53.86 0.6 undecidable manual P 54 18.0708 118 0.39 47
IV.MTCE.HHZ. 2020-12-22T00:04:52.90 0.1 undecidable manual P 278 14.0748 124 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTCE.HHE. ML:1.3 0.00020150000000000002 0.26 AML other m 2020-12-22T00:04:55.50
IV.MTCE.HHN. ML:1.0 0.000117 0.34 AML other m 2020-12-22T00:04:55.70
IV.RCAV.EHE. ML:1.2 0.00013800000000000002 0.3 AML other m 2020-12-22T00:04:58.91
IV.RCAV.EHN. ML:1.2 0.00014700000000000002 0.22 AML other m 2020-12-22T00:04:59.17
IV.FIAM.HHE. ML:0.7 0.000021649999999999998 0.6 AML other m 2020-12-22T00:05:01.30
IV.FIAM.HHN. ML:0.7 0.00002095 0.88 AML other m 2020-12-22T00:05:06.79
IV.LAV9.HHE. ML:1.6 0.00012390279 0.2 AML other m 2020-12-22T00:05:07.92
IV.LAV9.HHN. ML:1.7 0.0001795 0.4 AML other m 2020-12-22T00:05:08.88
IV.GIUL.HHN. ML:0.8 0.000016286405 0.24 AML other m 2020-12-22T00:05:09.09
IV.GIUL.HHE. ML:0.8 0.000013794144999999999 0.2 AML other m 2020-12-22T00:05:10.50
IV.LAV9.HNN. ML:1.7 0.00016803410000000002 0.32 AML other m 2020-12-22T00:05:11.44
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