Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 25-12-2020 and time 06:39:04 (UTC) in region 2 km NW Sambuci (RM)

A magnitude ML 2.1 earthquake occured in region: 2 km NW Sambuci (RM), on

  • 25-12-2020 06:39:04 (UTC)
  • 25-12-2020 07:39:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.9990, 12.9210 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
Sambuci RM 2 925 925
Saracinesco RM 3 185 1110
Vicovaro RM 3 4019 5129
Mandela RM 4 917 6046
Ciciliano RM 5 1336 7382
Castel Madama RM 5 7399 14781
Anticoli Corrado RM 6 915 15696
Roccagiovine RM 6 263 15959
San Polo dei Cavalieri RM 7 2992 18951
Cineto Romano RM 7 601 19552
Roviano RM 7 1351 20903
Cerreto Laziale RM 8 1118 22021
Marano Equo RM 8 779 22800
Licenza RM 9 1011 23811
Arsoli RM 9 1586 25397
Gerano RM 9 1263 26660
Agosta RM 10 1765 28425
Riofreddo RM 10 781 29206
San Gregorio da Sassola RM 10 1619 30825
Marcellina RM 10 7280 38105
Rocca Canterano RM 10 196 38301
Pisoniano RM 11 770 39071
Casape RM 11 744 39815
Tivoli RM 11 56533 96348
Percile RM 11 255 96603
Oricola AQ 11 1244 97847
Vallinfreda RM 12 283 98130
Canterano RM 12 351 98481
Cervara di Roma RM 12 455 98936
Poli RM 13 2418 101354
Rocca di Botte AQ 13 856 102210
Rocca Santo Stefano RM 13 975 103185
Vivaro Romano RM 13 182 103367
San Vito Romano RM 14 3273 106640
Monteflavio RM 15 1348 107988
Orvinio RI 15 405 108393
Palombara Sabina RM 15 13269 121662
Capranica Prenestina RM 15 351 122013
Camerata Nuova RM 16 447 122460
Bellegra RM 16 2887 125347
Guidonia Montecelio RM 16 88673 214020
Gallicano nel Lazio RM 16 6334 220354
Pereto AQ 16 682 221036
Subiaco RM 17 9074 230110
Castel San Pietro Romano RM 17 902 231012
Rocca di Cave RM 17 377 231389
Turania RI 17 241 231630
Carsoli AQ 17 5396 237026
Sant'Angelo Romano RM 18 5018 242044
Palestrina RM 18 21672 263716
Olevano Romano RM 18 6687 270403
Moricone RM 18 2650 273053
Montorio Romano RM 18 1984 275037
Roiate RM 18 737 275774
Pozzaglia Sabina RI 18 360 276134
Collalto Sabino RI 19 442 276576
Genazzano RM 19 6036 282612
Zagarolo RM 19 17843 300455
Affile RM 19 1548 302003
Scandriglia RI 20 3108 305111
Cave RM 20 11287 316398

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)
50 Km NE of Aprilia (73446 inhabitants)
50 Km NE of Pomezia (62966 inhabitants)
56 Km SW of L'Aquila (69753 inhabitants)
59 Km N of Latina (125985 inhabitants)
62 Km E of Fiumicino (78395 inhabitants)
66 Km NE of Anzio (54211 inhabitants)
67 Km SE of Terni (111501 inhabitants)
82 Km SE of Viterbo (67173 inhabitants)
94 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 2.1 2020-12-25
06:39:04		 41.999 12.9207 9 2021-02-26
14:56:13		 Bollettino Sismico Italiano INGV 85977671
Reviewed
Rev100 		ML 2.1 2020-12-25
06:39:04		 42.0062 12.9173 10 2020-12-25
06:52:32		 Sala Sismica INGV-Roma 85699051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-25 06:39:04 ± 0.08
Latitude 41.9990 ± 0.0036
Longitude 12.9207 ± 0.0048
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85977671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 356
Semi-minor axis of confidence ellipse (meter) 321
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 110
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) 28
Number of associated phases, regardless of their use for origin computation 60
Number of defining phases 59
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.13490
Epicentral distance of station farthest from the epicenter (degree) 1.09088
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 33
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 47
Type of magnitude ML
Reference to an origin 85977671
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-03 01:51:30

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 54
Type of magnitude ML
Reference to an origin 85699051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-25 06:52:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESI.HHZ. 2020-12-25T06:39:39.12 0.3 undecidable manual S 359 111.5994 50 1.72 31
IV.FDMO.HHZ. 2020-12-25T06:39:39.69 0.3 undecidable manual S 7 115.8951 50 1.14 43
IV.ASSB.HHZ. 2020-12-25T06:39:39.83 0.6 undecidable manual S 350 117.6933 50 0.79 33
IV.MGAB.HHZ. 2020-12-25T06:39:39.54 1.0 undecidable manual S 327 121.0899 50 -0.39 19
IV.MOMA.HHZ. 2020-12-25T06:39:33.01 0.3 undecidable manual S 342 93.8394 50 0.36 61
IV.SMA1.EHN. 2020-12-25T06:39:28.58 1.0 undecidable manual S 26 77.8665 50 0.18 22
IV.GAVE.EHZ. 2020-12-25T06:39:28.17 0.3 undecidable manual S 358 76.9674 50 0.02 67
IV.T0110.HHZ. 2020-12-25T06:39:28.35 0.3 undecidable manual S 70 74.8695 50 0.74 55
IV.POFI.HHZ. 2020-12-25T06:39:27.72 3.0 undecidable manual S 115 72.4719 50 0.77 0
IV.CESX.HHZ. 2020-12-25T06:39:27.89 0.3 undecidable manual S 338 72.9714 50 0.8 54
IV.LRP.EHZ. 2020-12-25T06:39:26.15 0.3 undecidable manual S 125 67.4769 50 0.52 61
IV.ARRO.EHZ. 2020-12-25T06:39:25.65 1.0 undecidable manual S 349 65.5899 50 0.52 20
IV.MGAB.HHZ. 2020-12-25T06:39:25.33 0.1 undecidable manual P 327 121.0899 50 0.33 77
IV.LNSS.HHZ. 2020-12-25T06:39:25.72 1.0 undecidable manual S 8 67.6767 50 0.03 23
IV.ASSB.HHZ. 2020-12-25T06:39:24.18 0.1 undecidable manual P 350 117.6933 50 -0.31 78
IV.VVLD.HHZ. 2020-12-25T06:39:23.64 0.3 undecidable manual S 104 59.6958 50 0.09 68
IV.CESI.HHZ. 2020-12-25T06:39:23.35 0.1 undecidable manual P 359 111.5994 50 -0.19 81
IV.FDMO.HHZ. 2020-12-25T06:39:23.97 0.1 undecidable manual P 7 115.8951 50 -0.24 79
IV.LATB.EHZ. 2020-12-25T06:39:22.56 0.3 undecidable manual S 176 56.0994 50 -0.04 70
IV.GIUL.HHZ. 2020-12-25T06:39:22.40 0.3 undecidable manual S 150 56.0994 50 -0.2 67
IV.MOMA.HHZ. 2020-12-25T06:39:20.61 0.1 undecidable manual P 342 93.8394 50 -0.19 84
IV.SRES.HHZ. 2020-12-25T06:39:19.25 0.6 undecidable manual S 308 42.9237 50 0.19 46
IV.PTQR.HHZ. 2020-12-25T06:39:18.42 0.3 undecidable manual S 86 39.627 50 0.23 69
IV.SMA1.EHN. 2020-12-25T06:39:18.63 0.1 undecidable manual P 26 77.8665 50 0.28 85
IV.SAMA.EHZ. 2020-12-25T06:39:18.03 0.6 undecidable manual S 228 36.3414 50 0.7 40
IV.INTR.HHZ. 2020-12-25T06:39:18.77 0.1 undecidable manual P 89 81.1521 50 -0.08 88
IV.GUAR.HHZ. 2020-12-25T06:39:18.17 0.3 undecidable manual S 125 39.5271 50 0.01 72
IT.RMMM.HGE. 2020-12-25T06:39:18.12 1.0 undecidable manual S 258 39.5271 50 -0.05 24
IV.T0110.HHZ. 2020-12-25T06:39:17.79 0.1 undecidable manual P 70 74.8695 50 -0.1 88
IV.POFI.HHZ. 2020-12-25T06:39:17.11 0.1 undecidable manual P 115 72.4719 50 -0.4 83
IV.CESX.HHZ. 2020-12-25T06:39:17.26 0.1 undecidable manual P 338 72.9714 50 -0.33 85
IV.GAVE.EHZ. 2020-12-25T06:39:17.64 0.1 undecidable manual P 358 76.9674 50 -0.56 79
IV.FIAM.HHZ. 2020-12-25T06:39:16.10 0.3 undecidable manual S 28 33.9438 50 -0.57 64
IV.LRP.EHZ. 2020-12-25T06:39:16.47 0.1 undecidable manual P 125 67.4769 50 -0.28 86
IV.ARRO.EHZ. 2020-12-25T06:39:16.09 0.1 undecidable manual P 349 65.5899 50 -0.37 85
IV.LNSS.HHZ. 2020-12-25T06:39:16.12 0.1 undecidable manual P 8 67.6767 50 -0.66 77
IV.RDP.HHZ. 2020-12-25T06:39:15.80 0.6 undecidable manual S 213 31.6461 105 -0.2 47
IV.VVLD.HHZ. 2020-12-25T06:39:15.22 0.1 undecidable manual P 104 59.6958 50 -0.33 87
IV.GIUL.HHZ. 2020-12-25T06:39:14.72 0.1 undecidable manual P 150 56.0994 50 -0.28 88
IV.RMP.HHZ. 2020-12-25T06:39:14.95 0.6 undecidable manual S 221 27.3504 108 0.38 45
IV.LATB.EHZ. 2020-12-25T06:39:14.67 0.1 undecidable manual P 176 56.0994 50 -0.33 87
IV.GUAR.HHZ. 2020-12-25T06:39:12.24 0.1 undecidable manual P 125 39.5271 50 -0.19 93
IT.RMMM.HGE. 2020-12-25T06:39:12.54 0.6 undecidable manual P 258 39.5271 50 0.1 47
IV.MA9.HHN. 2020-12-25T06:39:12.15 1.0 undecidable manual P 220 33.3444 50 0.66 21
IV.PTQR.HHZ. 2020-12-25T06:39:12.27 0.1 undecidable manual P 86 39.627 50 -0.19 93
IV.ROM9.HNE. 2020-12-25T06:39:12.96 1.0 undecidable manual P 241 38.4282 50 0.69 20
IV.SRES.HHZ. 2020-12-25T06:39:12.31 0.1 undecidable manual P 308 42.9237 50 -0.65 81
IV.LAV9.HNZ. 2020-12-25T06:39:12.56 1.0 undecidable manual P 207 40.0266 50 0.04 24
IV.SAMA.EHZ. 2020-12-25T06:39:12.16 0.1 undecidable manual P 228 36.3414 50 0.21 93
IV.VIVA.HHN. 2020-12-25T06:39:11.23 1.0 undecidable manual P 204 30.2475 106 0.31 23
IV.RCAV.EHE. 2020-12-25T06:39:11.49 0.6 undecidable manual S 173 16.9719 117 0.28 47
IV.FIAM.HHZ. 2020-12-25T06:39:11.35 0.1 undecidable manual P 28 33.9438 50 -0.23 93
IT.CSO1.HGE. 2020-12-25T06:39:11.94 0.3 undecidable manual S 51 17.871 116 0.46 68
IV.RDP.HHZ. 2020-12-25T06:39:11.37 0.1 undecidable manual P 213 31.6461 105 0.18 94
IV.MTCE.HHZ. 2020-12-25T06:39:10.42 0.3 undecidable manual S 280 14.9739 120 -0.18 73
IV.RMP.HHZ. 2020-12-25T06:39:10.56 0.1 undecidable manual P 221 27.3504 108 0.2 94
IT.MMP1.HGE. 2020-12-25T06:39:10.48 0.1 undecidable manual P 333 31.1466 105 -0.61 84
IT.CSO1.HGE. 2020-12-25T06:39:09.09 0.1 undecidable manual P 51 17.871 116 0.51 90
IV.MTCE.HHZ. 2020-12-25T06:39:08.10 0.1 undecidable manual P 280 14.9739 120 0.03 100
IV.RCAV.EHE. 2020-12-25T06:39:08.87 0.3 undecidable manual P 173 16.9719 117 0.44 68
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTCE.HHN. ML:1.9 0.0008751836500000001 0.1984 AML other m 2020-12-25T06:39:11.16
IV.MTCE.HHE. ML:2.3 0.002207913 0.2784 AML other m 2020-12-25T06:39:11.90
IV.RMP.HHE. ML:2.6 0.0022589625 0.32 AML other m 2020-12-25T06:39:16.97
IV.FIAM.HHN. ML:1.9 0.00035712205000000004 0.4 AML other m 2020-12-25T06:39:17.72
IV.FIAM.HNN. ML:2.2 0.0006948457000000001 0.4 AML other m 2020-12-25T06:39:17.72
IV.RMP.HHN. ML:2.5 0.0019227525000000002 0.3616 AML other m 2020-12-25T06:39:18.73
IV.PTQR.HHE. ML:2.2 0.0006292798500000001 1.7824 AML other m 2020-12-25T06:39:18.06
IV.PTQR.HHN. ML:2.2 0.0006027745499999999 1.7216 AML other m 2020-12-25T06:39:18.95
IV.FIAM.HHE. ML:1.8 0.00028361060000000005 0.4992 AML other m 2020-12-25T06:39:20.20
IV.GUAR.HHE. ML:2.1 0.00048946075 0.24 AML other m 2020-12-25T06:39:20.27
IV.GUAR.HHN. ML:2.1 0.00049101865 0.3808 AML other m 2020-12-25T06:39:20.48
IV.SRES.HHE. ML:1.8 0.0001951065 1.7024 AML other m 2020-12-25T06:39:22.04
IV.SRES.HHN. ML:1.8 0.0002240654 1.5392 AML other m 2020-12-25T06:39:24.00
IV.VVLD.HNE. ML:2.0 0.00019096225 0.272 AML other m 2020-12-25T06:39:27.50
IV.ARRO.EHN. ML:2.2 0.0002949332 0.1984 AML other m 2020-12-25T06:39:27.96
IV.GIUL.HHE. ML:1.7 0.0001215463 0.3616 AML other m 2020-12-25T06:39:28.37
IV.CESX.HHE. ML:2.2 0.00023316365 0.3808 AML other m 2020-12-25T06:39:28.56
IV.CESX.HHN. ML:2.1 0.0002009005 0.3776 AML other m 2020-12-25T06:39:28.76
IV.GAVE.EHN. ML:2.4 0.0003349186 0.24 AML other m 2020-12-25T06:39:29.21
IV.GIUL.HHN. ML:1.8 0.00015937204999999998 0.4 AML other m 2020-12-25T06:39:29.74
IV.POFI.HHN. ML:1.7 0.00007503574500000001 1.76 AML other m 2020-12-25T06:39:29.99
IV.VVLD.HHE. ML:2.0 0.0002094279 0.7392 AML other m 2020-12-25T06:39:30.00
IV.ARRO.EHE. ML:2.0 0.00016991495 1.7792 AML other m 2020-12-25T06:39:30.90
IV.LRP.EHN. ML:1.6 0.00006461391 0.2592 AML other m 2020-12-25T06:39:30.72
IV.GAVE.HNE. ML:2.3 0.00029177960000000003 0.2592 AML other m 2020-12-25T06:39:30.74
IV.VVLD.HNN. ML:2.1 0.00024023500000000002 0.4896 AML other m 2020-12-25T06:39:31.27
IV.VVLD.HHN. ML:2.2 0.00029195225 0.3392 AML other m 2020-12-25T06:39:31.27
IV.LNSS.HHN. ML:2.2 0.00028304649999999997 1.6384 AML other m 2020-12-25T06:39:31.09
IV.LRP.EHE. ML:2.1 0.00020617934999999998 0.2592 AML other m 2020-12-25T06:39:32.14
IV.LNSS.HNN. ML:2.2 0.0003005951 0.448 AML other m 2020-12-25T06:39:32.60
IV.MOMA.HHE. ML:2.4 0.0002648245 1.3792 AML other m 2020-12-25T06:39:34.07
IV.MOMA.HNN. ML:2.3 0.00020567995 1.4592 AML other m 2020-12-25T06:39:34.07
IV.MOMA.HNE. ML:2.2 0.00019031419999999998 1.392 AML other m 2020-12-25T06:39:34.77
IV.INTR.HHE. ML:2.1 0.00016726639999999998 0.5984 AML other m 2020-12-25T06:39:36.70
IV.INTR.HNE. ML:2.2 0.00020691464999999997 0.6208 AML other m 2020-12-25T06:39:36.72
IV.POFI.HHE. ML:1.8 0.00010646511 0.64 AML other m 2020-12-25T06:39:36.53
IV.INTR.HNN. ML:2.4 0.00032205214999999997 0.7424 AML other m 2020-12-25T06:39:36.57
IV.MOMA.HHN. ML:2.2 0.00019413275000000003 1.6576 AML other m 2020-12-25T06:39:37.88
IV.CESI.HHN. ML:2.3 0.00016257555 0.3808 AML other m 2020-12-25T06:39:39.55
IV.INTR.HHN. ML:2.3 0.00029501 1.12 AML other m 2020-12-25T06:39:41.77
IV.ASSB.HHN. ML:1.9 0.00006668946 0.3008 AML other m 2020-12-25T06:39:43.58
IV.MGAB.HHE. ML:2.2 0.00012579125 1.3408 AML other m 2020-12-25T06:39:44.19
IV.MGAB.HHN. ML:2.0 0.00007594784 0.2624 AML other m 2020-12-25T06:39:44.19
IV.FDMO.HHE. ML:2.0 0.00008683933000000001 0.3808 AML other m 2020-12-25T06:39:44.35
IV.CESI.HHE. ML:2.2 0.00012947135 0.5216 AML other m 2020-12-25T06:39:45.65
IV.FDMO.HHN. ML:1.9 0.00006561211999999999 0.4 AML other m 2020-12-25T06:39:46.68
IV.ASSB.HHE. ML:2.1 0.00009022354499999998 0.5408 AML other m 2020-12-25T06:39:46.66
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
Waveforms Seismic signals in miniseed + resp format Download