Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 02-12-2021 and time 04:06:20 (UTC) in region 2 km S Lanuvio (RM)

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

  • 02-12-2021 04:06:20 (UTC)
  • 02-12-2021 05:06:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.6630, 12.7080 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
Lanuvio RM 2 13632 13632
Genzano di Roma RM 5 23970 37602
Velletri RM 6 53303 90905
Nemi RM 7 1943 92848
Ariccia RM 7 19407 112255
Albano Laziale RM 9 41715 153970
Aprilia LT 9 73446 227416
Castel Gandolfo RM 11 8997 236413
Rocca di Papa RM 11 17034 253447
Cisterna di Latina LT 13 36868 290315
Lariano RM 13 13432 303747
Marino RM 13 43026 346773
Grottaferrata RM 15 20327 367100
Ardea RM 15 49183 416283
Rocca Priora RM 15 11962 428245
Frascati RM 16 22087 450332
Monte Compatri RM 17 11978 462310
Monte Porzio Catone RM 17 8693 471003
Pomezia RM 17 62966 533969
Cori LT 17 11065 545034
Rocca Massima LT 18 1136 546170
Ciampino RM 18 38412 584582
Artena RM 19 14276 598858
San Cesareo RM 19 15153 614011
Colonna RM 20 4287 618298

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km W of Velletri (53303 inhabitants)
9 Km NE of Aprilia (73446 inhabitants)
17 Km E of Pomezia (62966 inhabitants)
25 Km N of Anzio (54211 inhabitants)
27 Km NW of Latina (125985 inhabitants)
32 Km SE of Roma (2864731 inhabitants)
34 Km S of Tivoli (56533 inhabitants)
38 Km S of Guidonia Montecelio (88673 inhabitants)
41 Km E of Fiumicino (78395 inhabitants)
90 Km SE of Civitavecchia (52991 inhabitants)
96 Km SW of L'Aquila (69753 inhabitants)
98 Km SE of Viterbo (67173 inhabitants)
100 Km S of Terni (111501 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 2021-12-02
04:06:20		 41.6627 12.7085 10 2022-03-30
13:04:21		 Bollettino Sismico Italiano INGV 98342531
Reviewed
Rev100 		ML 1.6 2021-12-02
04:06:20		 41.6643 12.7017 11 2021-12-02
04:13:08		 Sala Sismica INGV-Roma 98037311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-02 04:06:20 ± 0.1
Latitude 41.6627 ± 0.0054
Longitude 12.7085 ± 0.0072
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 98342531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 686
Semi-minor axis of confidence ellipse (meter) 424
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 235
Circular confidence region, given by single value of horizontal uncertainty (meter) 690.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 187
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.71226
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 98342531
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-09 11:26:29

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 98037311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-02 04:13:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-12-02T04:07:06.41 3.0 undecidable manual S 0.58 0
IV.SACS.HHZ. 2021-12-02T04:07:02.26 3.0 undecidable manual S -0.12 0
IV.VVLD.HHZ. 2021-12-02T04:06:43.89 0.6 undecidable manual S 73 79.0653 50 0 45
IV.LRP.EHZ. 2021-12-02T04:06:42.71 0.3 undecidable manual S 91 72.7716 50 0.5 62
IV.SRES.HHZ. 2021-12-02T04:06:40.75 0.6 undecidable manual S 346 65.7897 50 0.42 43
IV.GUAR.HHZ. 2021-12-02T04:06:36.44 0.3 undecidable manual S 73 52.1034 50 -0.23 68
IV.GIUL.HHZ. 2021-12-02T04:06:35.75 0.3 undecidable manual S 104 46.7199 50 0.5 65
IV.VVLD.HHZ. 2021-12-02T04:06:33.47 0.3 undecidable manual P 73 79.0653 50 -0.39 62
IV.CERT.HHZ. 2021-12-02T04:06:33.78 0.3 undecidable manual S 35 38.9277 50 0.6 64
IV.LRP.EHZ. 2021-12-02T04:06:32.92 0.3 undecidable manual P 91 72.7716 50 0.03 68
IV.MTCE.HHZ. 2021-12-02T04:06:32.97 0.3 undecidable manual S 4 40.0266 50 -0.49 64
IV.SRES.HHZ. 2021-12-02T04:06:31.77 0.3 undecidable manual P 346 65.7897 50 -0.04 68
IV.RCAV.EHZ. 2021-12-02T04:06:30.23 0.3 undecidable manual S 44 28.3494 50 -0.11 72
IV.LATB.EHZ. 2021-12-02T04:06:30.03 0.3 undecidable manual S 132 28.1496 50 -0.27 70
IV.GUAR.HHZ. 2021-12-02T04:06:29.63 0.6 undecidable manual P 73 52.1034 50 -0.07 47
IV.ROM9.HNZ. 2021-12-02T04:06:29.77 0.6 undecidable manual S 319 24.3534 50 0.5 46
IV.GIUL.HHZ. 2021-12-02T04:06:28.62 0.6 negative manual P 104 46.7199 50 -0.25 45
IV.CERT.HHZ. 2021-12-02T04:06:27.67 0.6 positive manual P 35 38.9277 50 -0.01 48
IV.MTCE.HHZ. 2021-12-02T04:06:27.54 0.3 undecidable manual P 4 40.0266 50 -0.3 68
IT.RMMM.HGE. 2021-12-02T04:06:27.46 0.6 undecidable manual P 324 35.8419 50 0.27 47
IV.SAMA.EHZ. 2021-12-02T04:06:26.63 0.3 undecidable manual S 324 16.2726 123 -0.22 73
IV.RMP.HHZ. 2021-12-02T04:06:26.82 0.3 undecidable manual S 359 16.5723 122 -0.12 75
IV.LATB.EHZ. 2021-12-02T04:06:25.77 0.3 undecidable manual P 132 28.1496 50 -0.25 70
IV.ROM9.HNZ. 2021-12-02T04:06:25.87 0.3 undecidable manual P 319 24.3534 50 0.45 69
IV.RCAV.EHZ. 2021-12-02T04:06:25.93 0.3 negative manual P 44 28.3494 50 -0.11 72
IV.RDP.HHZ. 2021-12-02T04:06:25.05 0.3 undecidable manual S 1 10.878 134 -0.32 72
IV.VIVA.HHZ. 2021-12-02T04:06:25.52 0.3 undecidable manual S 28 10.9779 133 0.11 74
IV.RMP.HHZ. 2021-12-02T04:06:24.02 0.3 undecidable manual P 359 16.5723 122 -0.06 75
IV.RDP.HHZ. 2021-12-02T04:06:23.24 0.1 negative manual P 1 10.878 134 0.07 100
IV.VIVA.HHZ. 2021-12-02T04:06:23.30 0.1 positive manual P 28 10.9779 133 0.11 99
IV.LAV9.HNZ. 2021-12-02T04:06:23.85 0.3 undecidable manual S 334 1.8981 170 0.03 76
IV.SAMA.EHZ. 2021-12-02T04:06:23.89 0.3 undecidable manual P 324 16.2726 123 -0.13 74
IV.LAV9.HNZ. 2021-12-02T04:06:22.41 0.1 negative manual P 334 1.8981 170 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SAMA.EHN. ML:1.3 0.0001815 0.06 AML other m 2021-12-02T04:06:26.69
IV.SAMA.EHE. ML:1.6 0.00039449999999999994 0.16 AML other m 2021-12-02T04:06:27.54
IV.RCAV.EHE. ML:1.6 0.0002255 0.2 AML other m 2021-12-02T04:06:30.69
IV.RCAV.EHN. ML:1.6 0.00019028845 0.16 AML other m 2021-12-02T04:06:31.18
IV.CERT.HNN. ML:1.8 0.00020456785 0.24 AML other m 2021-12-02T04:06:34.74
IV.CERT.HHN. ML:1.6 0.00015785179999999998 0.2208 AML other m 2021-12-02T04:06:34.86
IV.CERT.HHE. ML:1.3 0.00007525 0.72 AML other m 2021-12-02T04:06:36.73
IV.GIUL.HHE. ML:1.5 0.00009574350500000001 0.1408 AML other m 2021-12-02T04:06:36.90
IV.GIUL.HHN. ML:1.6 0.00009819189 0.2208 AML other m 2021-12-02T04:06:37.01
IV.CERT.HNE. ML:1.6 0.00014415212999999998 1.6 AML other m 2021-12-02T04:06:37.02
IV.SRES.HHE. ML:1.6 0.000066656205 0.0192 AML other m 2021-12-02T04:06:39.64
IV.VVLD.HNE. ML:1.8 0.000100822785 0.5408 AML other m 2021-12-02T04:06:42.84
IV.LRP.EHE. ML:1.9 0.00013070859000000002 0.2016 AML other m 2021-12-02T04:06:43.50
IV.LRP.EHN. ML:1.2 0.0000273575 0.2208 AML other m 2021-12-02T04:06:44.56
IV.VVLD.HHE. ML:1.5 0.000041871615 0.16 AML other m 2021-12-02T04:06:45.09
IV.VVLD.HHN. ML:1.6 0.000059208714999999995 0.48 AML other m 2021-12-02T04:06:45.64
IV.SRES.HHN. ML:1.5 0.000058351929999999995 1.5424 AML other m 2021-12-02T04:06:54.01
IV.VVLD.HNN. ML:2.0 0.0001324434 0.7392 AML other m 2021-12-02T04:07:01.48
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