Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 22-12-2020 and time 13:42:24 (UTC) in region 2 km NW Sambuci (RM)

A magnitude ML 1.8 earthquake occured in region: 2 km NW Sambuci (RM), on

  • 22-12-2020 13:42:24 (UTC)
  • 22-12-2020 14:42:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.9980, 12.9180 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
Sambuci RM 2 925 925
Vicovaro RM 3 4019 4944
Saracinesco RM 3 185 5129
Mandela RM 4 917 6046
Ciciliano RM 4 1336 7382
Castel Madama RM 5 7399 14781
Roccagiovine RM 6 263 15044
Anticoli Corrado RM 6 915 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
San Gregorio da Sassola RM 10 1619 25430
Gerano RM 10 1263 26693
Marcellina RM 10 7280 33973
Arsoli RM 10 1586 35559
Agosta RM 10 1765 37324
Riofreddo RM 10 781 38105
Rocca Canterano RM 10 196 38301
Pisoniano RM 10 770 39071
Casape RM 10 744 39815
Tivoli RM 11 56533 96348
Percile RM 11 255 96603
Oricola AQ 12 1244 97847
Vallinfreda RM 12 283 98130
Canterano RM 12 351 98481
Poli RM 12 2418 100899
Cervara di Roma RM 13 455 101354
Rocca di Botte AQ 13 856 102210
Rocca Santo Stefano RM 13 975 103185
Vivaro Romano RM 14 182 103367
San Vito Romano RM 14 3273 106640
Monteflavio RM 15 1348 107988
Palombara Sabina RM 15 13269 121257
Orvinio RI 15 405 121662
Capranica Prenestina RM 15 351 122013
Guidonia Montecelio RM 16 88673 210686
Bellegra RM 16 2887 213573
Camerata Nuova RM 16 447 214020
Gallicano nel Lazio RM 16 6334 220354
Pereto AQ 17 682 221036
Castel San Pietro Romano RM 17 902 221938
Rocca di Cave RM 17 377 222315
Subiaco RM 17 9074 231389
Sant'Angelo Romano RM 17 5018 236407
Turania RI 17 241 236648
Palestrina RM 18 21672 258320
Carsoli AQ 18 5396 263716
Moricone RM 18 2650 266366
Olevano Romano RM 18 6687 273053
Montorio Romano RM 18 1984 275037
Roiate RM 18 737 275774
Pozzaglia Sabina RI 19 360 276134
Genazzano RM 19 6036 282170
Zagarolo RM 19 17843 300013
Collalto Sabino RI 19 442 300455
Affile RM 20 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)
36 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)
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 1.8 2020-12-22
13:42:24		 41.9977 12.9177 10 2021-02-26
14:56:17		 Bollettino Sismico Italiano INGV 86683071
Reviewed
Rev100 		ML 1.8 2020-12-22
13:42:23		 42.0082 12.9182 9 2020-12-22
13:58:10		 Sala Sismica INGV-Roma 85628021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-22 13:42:24 ± 0.09
Latitude 41.9977 ± 0.0045
Longitude 12.9177 ± 0.0073
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 86683071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 514
Semi-minor axis of confidence ellipse (meter) 372
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 241
Circular confidence region, given by single value of horizontal uncertainty (meter) 510.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 55
Number of associated phases, regardless of their use for origin computation 53
Number of defining phases 53
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.13310
Epicentral distance of station farthest from the epicenter (degree) 1.13045
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 35
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 27
Type of magnitude ML
Reference to an origin 86683071
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-16 11:59:46

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 85628021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-22 13:58:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESI.HHZ. 2020-12-22T13:42:57.00 1.0 undecidable manual S 359 111.6993 50 0.25 21
IV.MOMA.HHZ. 2020-12-22T13:42:52.10 1.0 undecidable manual S 342 93.8394 50 0.13 22
IV.VCEL.EHN. 2020-12-22T13:42:49.90 1.0 undecidable manual S 60 87.7455 50 -0.43 21
IV.GAVE.EHZ. 2020-12-22T13:42:48.10 0.6 undecidable manual S 359 77.0673 50 0.61 40
IV.CESX.HHE. 2020-12-22T13:42:47.71 1.0 undecidable manual S 338 72.9714 50 1.31 15
IV.GIGS.HHN. 2020-12-22T13:42:47.20 0.6 undecidable manual S 47 73.8705 50 0.58 41
IV.CAMP.HHE. 2020-12-22T13:42:45.40 1.0 undecidable manual S 34 72.0723 50 -0.75 19
IV.ARRO.EHZ. 2020-12-22T13:42:45.30 1.0 undecidable manual S 349 65.6898 50 0.84 19
IV.SACS.HHE. 2020-12-22T13:42:45.83 0.3 undecidable manual P 319 125.4744 50 0.75 52
IV.LRP.EHN. 2020-12-22T13:42:45.60 0.3 undecidable manual S 125 67.5768 50 0.64 60
IV.MGAB.HHZ. 2020-12-22T13:42:44.43 0.6 undecidable manual P 327 121.0899 50 0.03 43
IV.FDMO.HHZ. 2020-12-22T13:42:43.67 0.3 undecidable manual P 7 116.0949 50 0.04 64
IV.VVLD.HHZ. 2020-12-22T13:42:42.60 0.6 undecidable manual S 103 59.8956 50 -0.31 45
IV.CESI.HHZ. 2020-12-22T13:42:42.79 0.1 undecidable manual P 359 111.6993 50 -0.17 84
IV.TERO.HHZ. 2020-12-22T13:42:41.19 1.0 undecidable manual P 39 89.3439 50 1.68 11
IV.MC2.EHZ. 2020-12-22T13:42:41.76 0.6 undecidable manual P 12 103.8183 50 0.03 44
IV.GIUL.HHZ. 2020-12-22T13:42:41.60 0.6 undecidable manual S 150 56.0994 50 -0.3 46
IV.LATB.EHZ. 2020-12-22T13:42:41.70 0.6 undecidable manual S 176 55.9995 50 -0.17 47
IV.CERA.HNN. 2020-12-22T13:42:40.94 0.6 undecidable manual P 116 101.2209 50 -0.41 41
IV.MOMA.HHZ. 2020-12-22T13:42:40.02 0.3 undecidable manual P 342 93.8394 50 -0.19 65
IV.VCEL.EHN. 2020-12-22T13:42:40.80 1.0 undecidable manual P 60 87.7455 50 1.54 13
IV.NRCA.HHZ. 2020-12-22T13:42:39.97 0.1 undecidable manual P 10 94.1391 50 -0.28 85
IV.INTR.HHE. 2020-12-22T13:42:38.70 0.3 undecidable manual P 89 81.3519 50 0.42 64
IV.T0110.HHZ. 2020-12-22T13:42:38.16 0.3 undecidable manual P 70 75.1692 50 0.83 56
IV.T1299.HNN. 2020-12-22T13:42:38.37 0.3 undecidable manual P 23 76.6677 50 0.81 56
IV.GAVE.EHZ. 2020-12-22T13:42:37.18 0.3 undecidable manual P 359 77.0673 50 -0.44 64
IV.GUAR.HHZ. 2020-12-22T13:42:37.60 1.0 undecidable manual S 125 39.627 50 0.11 24
IV.GIGS.HHN. 2020-12-22T13:42:37.86 1.0 undecidable manual P 47 73.8705 50 0.74 19
IV.PTQR.HHZ. 2020-12-22T13:42:37.20 0.6 undecidable manual S 86 39.9267 50 -0.37 47
IV.BARO.EHZ. 2020-12-22T13:42:37.64 0.6 undecidable manual P 292 76.4679 50 0.11 46
IV.TOLF.HHN. 2020-12-22T13:42:37.80 0.6 undecidable manual P 276 75.9684 50 0.35 43
IV.LRP.EHN. 2020-12-22T13:42:36.03 0.3 undecidable manual P 125 67.5768 50 -0.13 70
IV.POFI.HNE. 2020-12-22T13:42:36.50 0.3 undecidable manual P 115 72.5718 50 -0.43 65
IV.CAMP.HHE. 2020-12-22T13:42:36.64 0.3 undecidable manual P 34 72.0723 50 -0.2 68
IV.CESX.HHE. 2020-12-22T13:42:36.78 0.6 undecidable manual P 338 72.9714 50 -0.21 45
IV.LNSS.HNZ. 2020-12-22T13:42:35.78 0.3 undecidable manual P 8 67.8765 50 -0.43 65
IV.FIAM.HHZ. 2020-12-22T13:42:35.60 0.3 undecidable manual S 29 34.2435 50 -0.44 69
IV.ARRO.EHZ. 2020-12-22T13:42:35.78 0.1 undecidable manual P 349 65.6898 50 -0.09 94
IV.VVLD.HHZ. 2020-12-22T13:42:34.74 0.1 undecidable manual P 103 59.8956 50 -0.24 92
IV.GIUL.HHZ. 2020-12-22T13:42:34.15 0.3 undecidable manual P 150 56.0994 50 -0.25 70
IV.LATB.EHZ. 2020-12-22T13:42:33.94 0.6 undecidable manual P 176 55.9995 50 -0.43 45
IV.SRES.HHN. 2020-12-22T13:42:32.34 1.0 undecidable manual P 308 42.8238 50 0 25
IV.GUAR.HHZ. 2020-12-22T13:42:31.89 0.3 undecidable manual P 125 39.627 50 0.04 75
IT.CSO1.HGZ. 2020-12-22T13:42:31.20 0.6 undecidable manual S 51 18.0708 118 -0.05 51
IV.PTQR.HHZ. 2020-12-22T13:42:31.88 0.1 undecidable manual P 86 39.9267 50 -0.01 100
IV.FIAM.HHZ. 2020-12-22T13:42:30.69 0.1 undecidable manual P 29 34.2435 50 -0.32 95
IV.RCAV.EHZ. 2020-12-22T13:42:30.70 0.3 undecidable manual S 172 16.872 120 -0.16 75
IV.RMP.HHZ. 2020-12-22T13:42:30.99 0.6 undecidable manual P 221 27.0507 110 1.1 36
IV.MTCE.HHZ. 2020-12-22T13:42:29.70 0.6 undecidable manual S 281 14.7741 123 -0.54 45
IT.MMP1.HGE. 2020-12-22T13:42:29.95 0.3 undecidable manual P 334 31.2465 50 -0.6 66
IV.RCAV.EHZ. 2020-12-22T13:42:28.54 0.1 undecidable manual P 172 16.872 120 0.52 94
IT.CSO1.HGZ. 2020-12-22T13:42:28.59 0.3 undecidable manual P 51 18.0708 118 0.34 74
IV.MTCE.HHZ. 2020-12-22T13:42:27.55 0.3 undecidable manual P 281 14.7741 123 -0.11 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTCE.HHN. ML:2.0 0.0009040707000000001 0.1792 AML other m 2020-12-22T13:42:30.71
IV.MTCE.HHE. ML:2.1 0.0011862590499999999 0.2176 AML other m 2020-12-22T13:42:31.13
IV.FIAM.HHE. ML:1.7 0.000215 0.6 AML other m 2020-12-22T13:42:36.05
IV.PTQR.HHN. ML:2.1 0.000474 0.5 AML other m 2020-12-22T13:42:38.45
IV.FIAM.HHN. ML:1.8 0.000243064 0.6976 AML other m 2020-12-22T13:42:39.13
IV.PTQR.HHE. ML:1.9 0.00030000000000000003 0.2 AML other m 2020-12-22T13:42:38.69
IV.FIAM.HNN. ML:2.0 0.00046752234999999996 0.5248 AML other m 2020-12-22T13:42:39.13
IV.GUAR.HHN. ML:1.8 0.00024743525 0.5568 AML other m 2020-12-22T13:42:40.36
IV.LATB.EHN. ML:1.1 0.00002782658 0.6016 AML other m 2020-12-22T13:42:42.20
IV.LATB.EHE. ML:1.4 0.000048322355 0.5632 AML other m 2020-12-22T13:42:43.39
IV.GIUL.HHN. ML:1.6 0.000087858715 0.1792 AML other m 2020-12-22T13:42:43.97
IV.GIUL.HHE. ML:1.5 0.00007465503 0.2048 AML other m 2020-12-22T13:42:44.98
IV.GUAR.HHE. ML:1.8 0.0002402218 0.6976 AML other m 2020-12-22T13:42:47.08
IV.VVLD.HHE. ML:1.8 0.0001225 0.74 AML other m 2020-12-22T13:42:49.53
IV.VVLD.HHN. ML:1.9 0.0001605 0.56 AML other m 2020-12-22T13:42:50.52
IV.VVLD.HNN. ML:1.9 0.00017997945 0.5696 AML other m 2020-12-22T13:42:50.52
IV.BARO.EHE. ML:1.9 0.0001096157 0.5568 AML other m 2020-12-22T13:42:50.94
IV.GAVE.EHN. ML:1.9 0.000126038855 0.3968 AML other m 2020-12-22T13:42:53.25
IV.MOMA.HHE. ML:1.9 0.00009743962 0.5376 AML other m 2020-12-22T13:42:54.36
IV.GAVE.EHE. ML:1.9 0.000118692395 0.2176 AML other m 2020-12-22T13:42:55.34
IV.MOMA.HHN. ML:1.8 0.00006733455500000001 0.5568 AML other m 2020-12-22T13:42:57.17
IV.CESI.HHN. ML:2.0 0.00008299999999999998 0.54 AML other m 2020-12-22T13:42:59.09
IV.MGAB.HHE. ML:2.0 0.00007825 0.54 AML other m 2020-12-22T13:43:03.40
IV.MGAB.HHN. ML:1.7 0.00004235 0.42 AML other m 2020-12-22T13:43:03.88
IV.FDMO.HHE. ML:1.6 0.0000357427265 0.2432 AML other m 2020-12-22T13:43:03.94
IV.CESI.HHE. ML:2.0 0.00007719999999999999 1.5 AML other m 2020-12-22T13:43:04.19
IV.FDMO.HHN. ML:1.6 0.00003182638 0.7616 AML other m 2020-12-22T13:43:06.45
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