Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 18-12-2020 and time 07:11:10 (Italy) in region 2 km W Saracinesco (RM)

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

  • 18-12-2020 06:11:10 (UTC)
  • 18-12-2020 07:11:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.0070, 12.9240 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
Saracinesco RM 2 185 185
Sambuci RM 3 925 1110
Vicovaro RM 3 4019 5129
Mandela RM 3 917 6046
Ciciliano RM 5 1336 7382
Roccagiovine RM 5 263 7645
Castel Madama RM 6 7399 15044
Anticoli Corrado RM 6 915 15959
Cineto Romano RM 6 601 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
Cerreto Laziale RM 8 1118 23811
Arsoli RM 9 1586 25397
Riofreddo RM 9 781 26178
Agosta RM 9 1765 27943
Marcellina RM 10 7280 35223
Percile RM 10 255 35478
Gerano RM 10 1263 36741
Rocca Canterano RM 10 196 36937
Vallinfreda RM 11 283 37220
San Gregorio da Sassola RM 11 1619 38839
Oricola AQ 11 1244 40083
Pisoniano RM 11 770 40853
Tivoli RM 11 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 13 182 99974
Poli RM 14 2418 102392
Rocca Santo Stefano RM 14 975 103367
Monteflavio RM 14 1348 104715
Orvinio RI 14 405 105120
San Vito Romano RM 15 3273 108393
Palombara Sabina RM 15 13269 121662
Camerata Nuova RM 15 447 122109
Pereto AQ 16 682 122791
Capranica Prenestina RM 16 351 123142
Turania RI 16 241 123383
Guidonia Montecelio RM 16 88673 212056
Bellegra RM 16 2887 214943
Carsoli AQ 17 5396 220339
Subiaco RM 17 9074 229413
Gallicano nel Lazio RM 17 6334 235747
Pozzaglia Sabina RI 17 360 236107
Moricone RM 17 2650 238757
Montorio Romano RM 18 1984 240741
Sant'Angelo Romano RM 18 5018 245759
Collalto Sabino RI 18 442 246201
Castel San Pietro Romano RM 18 902 247103
Rocca di Cave RM 18 377 247480
Olevano Romano RM 19 6687 254167
Palestrina RM 19 21672 275839
Roiate RM 19 737 276576
Scandriglia RI 19 3108 279684
Affile RM 20 1548 281232
Genazzano RM 20 6036 287268
Zagarolo RM 20 17843 305111

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)
38 Km NE of Velletri (53303 inhabitants)
39 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)
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 1.8 2020-12-18
06:11:10		 42.0073 12.9238 10 2021-02-26
14:56:16		 Bollettino Sismico Italiano INGV 86591091
Reviewed
Rev100 		ML 1.7 2020-12-18
06:11:10		 42.0103 12.9043 11 2020-12-18
06:24:41		 Sala Sismica INGV-Roma 85510311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-18 06:11:10 ± 0.07
Latitude 42.0073 ± 0.0036
Longitude 12.9238 ± 0.0048
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 86591091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 408
Semi-minor axis of confidence ellipse (meter) 250
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 174
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 37
Number of associated phases, regardless of their use for origin computation 52
Number of defining phases 41
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.05670
Number of stations at which the event was observed 38
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 85510311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-18 06:24:41

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 86591091
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-22 17:23:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MILZ.HHZ. 2020-12-18T06:13:11.76 3.0 undecidable manual Sg 10.09 0
IV.TDS.HHZ. 2020-12-18T06:13:00.52 3.0 undecidable manual Sg 14.51 0
IV.MAGA.HHZ. 2020-12-18T06:12:58.13 3.0 undecidable manual Sn -2.9 0
HL.VLS.HHZ. 2020-12-18T06:12:57.27 3.0 undecidable manual Pn 4.7 0
CR.STON.BHZ. 2020-12-18T06:12:55.34 3.0 undecidable manual Sn 6.09 0
GU.BLANC.HHZ. 2020-12-18T06:12:52.46 3.0 undecidable manual Pg 16.860001 0
IV.RESU.HHZ. 2020-12-18T06:12:31.87 3.0 undecidable manual Pg 14.57 0
IV.FIR.HHZ. 2020-12-18T06:12:16.33 3.0 undecidable manual Sn 3.23 0
MN.TRI.HHZ. 2020-12-18T06:12:10.86 3.0 negative manual Pn 3.36 0
IV.PAOL.HHZ. 2020-12-18T06:11:58.30 3.0 undecidable manual S -0.75 0
IV.PZUN.HHZ. 2020-12-18T06:11:57.41 3.0 negative manual Pg 6.07 0
IV.TOLF.HHN. 2020-12-18T06:11:34.68 0.6 undecidable manual S 275 76.368 50 0.62 40
IV.BARO.HNZ. 2020-12-18T06:11:34.17 0.6 undecidable manual S 291 76.5678 50 0.05 46
IV.MF5.EHZ. 2020-12-18T06:11:31.43 1.0 undecidable manual P 22 117.2937 50 0.87 16
IV.VVLD.HHZ. 2020-12-18T06:11:29.69 0.3 undecidable manual S 105 59.6958 50 0.09 70
IV.GIUL.HHZ. 2020-12-18T06:11:28.74 0.3 undecidable manual S 151 56.7987 50 -0.1 70
IV.LATB.EHE. 2020-12-18T06:11:28.76 0.3 undecidable manual S 177 56.9985 50 -0.14 69
IV.MOMA.HHZ. 2020-12-18T06:11:26.65 0.3 undecidable manual P 342 93.0402 50 -0.17 64
IV.PTQR.HHZ. 2020-12-18T06:11:24.45 0.3 undecidable manual S 87 39.3273 50 0.28 70
IV.BARO.HNZ. 2020-12-18T06:11:24.55 0.6 undecidable manual P 291 76.5678 50 0.26 44
IV.T1299.HNN. 2020-12-18T06:11:24.97 0.6 undecidable manual P 23 75.4689 50 0.85 36
IV.CAMP.HHE. 2020-12-18T06:11:24.42 0.6 undecidable manual P 34 70.8735 50 1.01 34
IV.SMA1.EHN. 2020-12-18T06:11:24.95 1.0 undecidable manual P 26 76.9674 50 0.61 20
IV.TOLF.HHN. 2020-12-18T06:11:24.90 0.3 undecidable manual P 275 76.368 50 0.64 59
IV.GUAR.HHZ. 2020-12-18T06:11:24.28 0.6 undecidable manual S 126 39.8268 50 -0.02 49
IV.POFI.HNE. 2020-12-18T06:11:23.25 0.3 undecidable manual P 116 72.5718 50 -0.43 63
IV.CESX.HHZ. 2020-12-18T06:11:23.38 0.3 undecidable manual P 338 72.1722 50 -0.23 66
IV.MA9.HHN. 2020-12-18T06:11:23.06 0.6 undecidable manual S 220 34.2435 50 0.25 47
IV.LNSS.HNZ. 2020-12-18T06:11:22.28 0.3 undecidable manual P 8 66.7776 50 -0.5 63
IV.LRP.EHZ. 2020-12-18T06:11:22.53 0.3 undecidable manual P 126 67.7766 50 -0.41 64
IV.RDP.HHZ. 2020-12-18T06:11:22.47 0.6 undecidable manual S 213 32.5452 50 0.1 49
IV.ARRO.EHZ. 2020-12-18T06:11:22.43 0.6 undecidable manual P 348 64.7907 50 -0.04 47
IV.FIAM.HHZ. 2020-12-18T06:11:22.16 0.3 undecidable manual S 29 33.0447 50 -0.32 70
IV.LATB.EHE. 2020-12-18T06:11:21.50 0.6 undecidable manual P 177 56.9985 50 0.22 46
IV.RMP.HHN. 2020-12-18T06:11:21.45 0.6 undecidable manual S 220 28.2495 50 0.24 48
IV.VVLD.HHZ. 2020-12-18T06:11:21.38 0.3 undecidable manual P 105 59.6958 50 -0.31 67
IV.GIUL.HHZ. 2020-12-18T06:11:20.94 0.3 undecidable manual P 151 56.7987 50 -0.31 67
IT.RMMM.HGZ. 2020-12-18T06:11:19.09 1.0 undecidable manual P 257 40.0266 50 0.44 22
IV.SRES.HHZ. 2020-12-18T06:11:18.47 0.6 undecidable manual P 307 42.5241 50 -0.57 43
IV.RCAV.EHN. 2020-12-18T06:11:18.01 0.3 undecidable manual S 174 17.871 118 0.12 75
IV.GUAR.HHZ. 2020-12-18T06:11:18.27 0.1 undecidable manual P 126 39.8268 50 -0.36 91
IV.MA9.HHN. 2020-12-18T06:11:18.42 0.6 undecidable manual P 220 34.2435 50 0.65 42
IV.PTQR.HHZ. 2020-12-18T06:11:18.38 0.3 undecidable manual P 87 39.3273 50 -0.17 71
IT.CSO1.HGZ. 2020-12-18T06:11:18.07 0.1 undecidable manual S 52 17.0718 119 0.42 93
IV.FIAM.HHZ. 2020-12-18T06:11:17.31 0.3 undecidable manual P 29 33.0447 50 -0.26 71
IV.RDP.HHZ. 2020-12-18T06:11:17.93 0.6 undecidable manual P 213 32.5452 50 0.42 46
IV.MTCE.HHZ. 2020-12-18T06:11:16.51 0.1 undecidable manual S 277 15.0738 122 -0.55 91
IT.MMP1.HGZ. 2020-12-18T06:11:16.80 1.0 undecidable manual P 332 30.4473 50 -0.38 23
IV.RMP.HHN. 2020-12-18T06:11:16.52 1.0 undecidable manual P 220 28.2495 50 -0.32 24
IV.RCAV.EHN. 2020-12-18T06:11:15.02 0.3 undecidable manual P 174 17.871 118 0.09 75
IT.CSO1.HGZ. 2020-12-18T06:11:15.08 0.3 undecidable manual P 52 17.0718 119 0.29 72
IV.MTCE.HHZ. 2020-12-18T06:11:14.31 0.1 positive manual P 277 15.0738 122 -0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTCE.HHE. ML:2.2 0.0015550000000000002 1.02 AML other m 2020-12-18T06:11:17.19
IV.MTCE.HHN. ML:1.8 0.000697 1.34 AML other m 2020-12-18T06:11:17.29
IV.FIAM.HHN. ML:1.6 0.000185 1.22 AML other m 2020-12-18T06:11:23.21
IV.PTQR.HHE. ML:1.8 0.0002095 0.2 AML other m 2020-12-18T06:11:25.08
IV.PTQR.HHN. ML:1.6 0.0001565 0.26 AML other m 2020-12-18T06:11:25.10
IV.GUAR.HHE. ML:2.2 0.0005285 1.08 AML other m 2020-12-18T06:11:26.41
IV.RDP.HHE. ML:2.1 0.0006054999999999999 0.38 AML other m 2020-12-18T06:11:27.60
IV.FIAM.HHE. ML:1.5 0.0001375 1.18 AML other m 2020-12-18T06:11:27.66
IV.RDP.HHN. ML:2.3 0.000829 1.48 AML other m 2020-12-18T06:11:28.83
IV.GUAR.HHN. ML:2.0 0.00034750000000000004 0.32 AML other m 2020-12-18T06:11:29.63
IV.VVLD.HHE. ML:1.7 0.00009604999999999999 1.7 AML other m 2020-12-18T06:11:29.11
IV.GIUL.HHN. ML:1.5 0.0000766 0.16 AML other m 2020-12-18T06:11:30.66
IV.ARRO.EHE. ML:1.6 0.00008065 0.48 AML other m 2020-12-18T06:11:34.27
IV.GIUL.HHE. ML:1.5 0.00007255 0.66 AML other m 2020-12-18T06:11:34.40
IV.ARRO.EHN. ML:1.6 0.00007545 0.16 AML other m 2020-12-18T06:11:34.53
IV.LRP.EHN. ML:1.2 0.000029449999999999998 0.2 AML other m 2020-12-18T06:11:35.36
IV.CESX.HHN. ML:1.8 0.00009914999999999998 1.2 AML other m 2020-12-18T06:11:35.75
IV.VVLD.HHN. ML:1.7 0.00011175 0.38 AML other m 2020-12-18T06:11:37.39
IV.LRP.EHE. ML:1.8 0.00009855 0.96 AML other m 2020-12-18T06:11:37.02
IV.CESX.HHE. ML:1.8 0.000106 0.48 AML other m 2020-12-18T06:11:38.25
IV.MOMA.HHN. ML:2.0 0.00009884999999999999 1.4 AML other m 2020-12-18T06:11:40.15
IV.MOMA.HHE. ML:2.0 0.0001155 1.34 AML other m 2020-12-18T06:11:40.18
IV.OFFI.HHN. ML:2.2 0.00012405 0.68 AML other m 2020-12-18T06:12:00.18
IV.OFFI.HHE. ML:2.2 0.000113 1.26 AML other m 2020-12-18T06:12:02.66
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