Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 17-12-2020 and time 23:43:13 (Italy) in region 2 km W Saracinesco (RM)

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

  • 17-12-2020 22:43:13 (UTC)
  • 17-12-2020 23:43:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.0100, 12.9250 at 8 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
Saracinesco RM 2 185 185
Mandela RM 3 917 1102
Sambuci RM 3 925 2027
Vicovaro RM 3 4019 6046
Roccagiovine RM 5 263 6309
Ciciliano RM 5 1336 7645
Anticoli Corrado RM 6 915 8560
Cineto Romano RM 6 601 9161
Castel Madama RM 6 7399 16560
Roviano RM 6 1351 17911
San Polo dei Cavalieri RM 7 2992 20903
Licenza RM 8 1011 21914
Marano Equo RM 8 779 22693
Arsoli RM 9 1586 24279
Cerreto Laziale RM 9 1118 25397
Riofreddo RM 9 781 26178
Agosta RM 9 1765 27943
Percile RM 10 255 28198
Marcellina RM 10 7280 35478
Gerano RM 10 1263 36741
Rocca Canterano RM 10 196 36937
Vallinfreda RM 10 283 37220
Oricola AQ 11 1244 38464
San Gregorio da Sassola RM 11 1619 40083
Pisoniano RM 12 770 40853
Tivoli RM 12 56533 97386
Casape RM 12 744 98130
Canterano RM 12 351 98481
Cervara di Roma RM 12 455 98936
Rocca di Botte AQ 12 856 99792
Vivaro Romano RM 12 182 99974
Orvinio RI 14 405 100379
Poli RM 14 2418 102797
Rocca Santo Stefano RM 14 975 103772
Monteflavio RM 14 1348 105120
Palombara Sabina RM 15 13269 118389
San Vito Romano RM 15 3273 121662
Camerata Nuova RM 15 447 122109
Pereto AQ 16 682 122791
Turania RI 16 241 123032
Carsoli AQ 16 5396 128428
Guidonia Montecelio RM 16 88673 217101
Capranica Prenestina RM 16 351 217452
Bellegra RM 17 2887 220339
Pozzaglia Sabina RI 17 360 220699
Subiaco RM 17 9074 229773
Moricone RM 17 2650 232423
Montorio Romano RM 17 1984 234407
Gallicano nel Lazio RM 18 6334 240741
Collalto Sabino RI 18 442 241183
Sant'Angelo Romano RM 18 5018 246201
Rocca di Cave RM 18 377 246578
Castel San Pietro Romano RM 18 902 247480
Scandriglia RI 19 3108 250588
Olevano Romano RM 19 6687 257275
Roiate RM 19 737 258012
Palestrina RM 19 21672 279684
Affile RM 20 1548 281232
Genazzano RM 20 6036 287268

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km E of Tivoli (56533 inhabitants)
16 Km E of Guidonia Montecelio (88673 inhabitants)
38 Km NE of Velletri (53303 inhabitants)
39 Km E of Roma (2864731 inhabitants)
51 Km NE of Aprilia (73446 inhabitants)
51 Km NE of Pomezia (62966 inhabitants)
55 Km SW of L'Aquila (69753 inhabitants)
60 Km N of Latina (125985 inhabitants)
63 Km E of Fiumicino (78395 inhabitants)
66 Km SE of Terni (111501 inhabitants)
67 Km NE of Anzio (54211 inhabitants)
81 Km SE of Viterbo (67173 inhabitants)
94 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 1.6 2020-12-17
22:43:13		 42.0095 12.9252 8 2021-02-26
14:56:14		 Bollettino Sismico Italiano INGV 86168291
Reviewed
Rev100 		ML 1.6 2020-12-17
22:43:13		 42.0163 12.9197 9 2020-12-17
22:50:04		 Sala Sismica INGV-Roma 85502851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-17 22:43:13 ± 0.07
Latitude 42.0095 ± 0.0036
Longitude 12.9252 ± 0.0061
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86168291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 385
Semi-minor axis of confidence ellipse (meter) 340
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 282
Circular confidence region, given by single value of horizontal uncertainty (meter) 390.0
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 37
Number of defining phases 36
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.05131
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 86168291
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-11 10:56:28

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 25
Type of magnitude ML
Reference to an origin 85502851
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-17 22:50:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HHZ. 2020-12-17T22:43:42.83 0.3 undecidable manual S 342 92.8404 50 1.27 42
IV.GAVE.EHZ. 2020-12-17T22:43:37.41 0.3 undecidable manual S 358 75.7686 50 0.4 62
IV.ASSB.HHZ. 2020-12-17T22:43:33.15 0.1 undecidable manual P 349 116.6943 50 -0.3 78
IV.FDMO.HHZ. 2020-12-17T22:43:33.19 0.6 undecidable manual P 7 114.6963 50 0.04 41
IV.VVLD.HHZ. 2020-12-17T22:43:32.90 0.3 undecidable manual S 105 59.6958 50 0.19 67
IV.GIUL.HHZ. 2020-12-17T22:43:32.25 0.3 undecidable manual S 151 56.9985 50 0.25 66
IV.LATB.EHZ. 2020-12-17T22:43:31.64 0.3 undecidable manual S 177 57.2982 50 -0.43 64
IV.MOMA.HHZ. 2020-12-17T22:43:29.60 0.3 undecidable manual P 342 92.8404 50 -0.17 63
IV.TOLF.HHZ. 2020-12-17T22:43:28.49 0.3 undecidable manual P 275 76.4679 50 1.24 44
IV.PTQR.HHZ. 2020-12-17T22:43:27.50 0.3 undecidable manual S 88 39.2274 50 0.25 68
IV.GUAR.HHE. 2020-12-17T22:43:27.61 0.3 undecidable manual S 127 39.9267 50 0.18 69
IV.GAVE.EHZ. 2020-12-17T22:43:26.75 0.3 undecidable manual P 358 75.7686 50 -0.4 62
IV.POFI.HHZ. 2020-12-17T22:43:26.33 0.3 undecidable manual P 116 72.6717 50 -0.33 63
IV.FIAM.HHZ. 2020-12-17T22:43:25.15 0.3 undecidable manual S 29 32.745 104 -0.23 70
IV.RDP.HHZ. 2020-12-17T22:43:25.61 0.3 undecidable manual S 213 32.8449 104 0.2 70
IV.ARRO.EHZ. 2020-12-17T22:43:25.22 0.1 undecidable manual P 348 64.491 50 -0.19 88
IT.MMP1.HGE. 2020-12-17T22:43:24.30 0.3 undecidable manual S 331 30.3474 105 -0.26 69
IV.VVLD.HHZ. 2020-12-17T22:43:24.35 0.3 undecidable manual P 105 59.6958 50 -0.31 65
IV.RMP.HHZ. 2020-12-17T22:43:24.50 0.6 undecidable manual S 220 28.4493 106 0.55 43
IV.GIUL.HHZ. 2020-12-17T22:43:23.75 0.1 undecidable manual P 151 56.9985 50 -0.5 84
IV.LATB.EHZ. 2020-12-17T22:43:23.99 0.3 undecidable manual P 177 57.2982 50 -0.3 66
IV.LAV9.HHZ. 2020-12-17T22:43:22.00 0.1 undecidable manual P 207 41.2254 50 0.17 93
IV.SRES.HHZ. 2020-12-17T22:43:21.45 0.6 undecidable manual P 307 42.4242 50 -0.56 42
IV.SAMA.EHZ. 2020-12-17T22:43:21.22 0.1 undecidable manual P 227 37.4292 50 -0.02 96
IV.PTQR.HHZ. 2020-12-17T22:43:21.51 0.3 undecidable manual P 88 39.2274 50 0 72
IV.GUAR.HHE. 2020-12-17T22:43:21.37 0.3 undecidable manual P 127 39.9267 50 -0.25 68
IV.ROM9.HNZ. 2020-12-17T22:43:21.97 3.0 undecidable manual P 0.49 0
IT.CSO1.HGE. 2020-12-17T22:43:20.83 0.3 undecidable manual S 53 16.7721 116 0.68 63
IV.RCAV.EHZ. 2020-12-17T22:43:20.36 0.6 undecidable manual S 175 18.0708 114 -0.19 48
IV.FIAM.HHZ. 2020-12-17T22:43:20.19 0.1 undecidable manual P 29 32.745 104 -0.24 93
IV.RDP.HHZ. 2020-12-17T22:43:20.98 0.6 undecidable manual P 213 32.8449 104 0.53 43
IV.MTCE.HHZ. 2020-12-17T22:43:19.37 0.3 undecidable manual S 276 15.1737 118 -0.27 71
IV.RMP.HHZ. 2020-12-17T22:43:19.52 0.1 undecidable manual P 220 28.4493 106 -0.08 96
IT.MMP1.HGE. 2020-12-17T22:43:19.90 0.6 undecidable manual P 331 30.3474 105 -0.06 48
IV.MTCE.HHZ. 2020-12-17T22:43:17.13 0.1 positive manual P 276 15.1737 118 0.02 100
IT.CSO1.HGE. 2020-12-17T22:43:17.63 0.3 undecidable manual P 53 16.7721 116 0.22 72
IV.RCAV.EHZ. 2020-12-17T22:43:17.92 0.3 undecidable manual P 175 18.0708 114 0.28 71
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTCE.HHE. ML:1.7 0.0005940000000000001 0.9 AML other m 2020-12-17T22:43:19.61
IV.MTCE.HHN. ML:1.7 0.0005425 0.76 AML other m 2020-12-17T22:43:20.09
IV.RCAV.EHN. ML:1.7 0.00046 0.62 AML other m 2020-12-17T22:43:21.18
IV.RCAV.EHE. ML:1.5 0.00024991015 0.2176 AML other m 2020-12-17T22:43:20.60
IV.RMP.HHE. ML:2.2 0.0007515000000000001 0.42 AML other m 2020-12-17T22:43:25.77
IV.FIAM.HHN. ML:1.4 0.000118 0.44 AML other m 2020-12-17T22:43:26.76
IV.PTQR.HHE. ML:1.7 0.000188 1.46 AML other m 2020-12-17T22:43:28.03
IV.PTQR.HHN. ML:1.5 0.000127 0.3 AML other m 2020-12-17T22:43:28.03
IV.RDP.HHN. ML:2.0 0.00045499999999999995 0.56 AML other m 2020-12-17T22:43:28.28
IV.SRES.HHE. ML:1.5 0.00009604999999999999 1.76 AML other m 2020-12-17T22:43:29.11
IV.RDP.HHE. ML:1.9 0.000364 0.44 AML other m 2020-12-17T22:43:29.63
IV.FIAM.HHE. ML:1.2 0.00006796349000000001 0.64 AML other m 2020-12-17T22:43:25.77
IV.LAV9.HHN. ML:2.0 0.000348 0.42 AML other m 2020-12-17T22:43:30.21
IV.RMP.HHN. ML:1.9 0.00043422679999999996 0.5376 AML other m 2020-12-17T22:43:25.21
IV.SRES.HHN. ML:1.4 0.00007305 0.78 AML other m 2020-12-17T22:43:32.10
IV.VVLD.HHN. ML:1.6 0.00007735 1.06 AML other m 2020-12-17T22:43:33.68
IV.GIUL.HHE. ML:1.3 0.00004195 0.64 AML other m 2020-12-17T22:43:33.51
IV.GIUL.HHN. ML:1.4 0.000055350000000000004 1.18 AML other m 2020-12-17T22:43:34.93
IV.ARRO.EHE. ML:1.5 0.00006345000000000001 0.2 AML other m 2020-12-17T22:43:35.50
IV.LATB.EHE. ML:1.1 0.0000264 0.96 AML other m 2020-12-17T22:43:35.89
IV.ARRO.EHN. ML:1.6 0.0000712 0.64 AML other m 2020-12-17T22:43:37.85
IV.GAVE.EHN. ML:2.0 0.0001555 0.32 AML other m 2020-12-17T22:43:38.17
IV.GAVE.EHE. ML:1.8 0.00008609999999999999 0.26 AML other m 2020-12-17T22:43:40.08
IV.FIAM.HNN. ML:1.3 0.000094286415 0.8448 AML other m 2020-12-17T22:43:25.84
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