Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.1 on date 02-01-2022 and time 21:46:48 (UTC) in region 4 km NW Rocca Massima (LT)

A magnitude Md 2.1 earthquake occured in region: 4 km NW Rocca Massima (LT), on

  • 02-01-2022 21:46:48 (UTC)
  • 02-01-2022 22:46:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.7070, 12.8830 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Rocca Massima LT 4 1136 1136
Artena RM 5 14276 15412
Lariano RM 5 13432 28844
Cori LT 8 11065 39909
Valmontone RM 8 15959 55868
Velletri RM 9 53303 109171
Labico RM 9 6379 115550
Colleferro RM 11 21595 137145
Segni RM 12 9159 146304
Cave RM 13 11287 157591
Cisterna di Latina LT 13 36868 194459
Rocca Priora RM 14 11962 206421
Nemi RM 14 1943 208364
Gavignano RM 14 1916 210280
San Cesareo RM 15 15153 225433
Montelanico RM 15 2131 227564
Palestrina RM 15 21672 249236
Lanuvio RM 15 13632 262868
Norma LT 15 3946 266814
Zagarolo RM 16 17843 284657
Rocca di Papa RM 16 17034 301691
Castel San Pietro Romano RM 16 902 302593
Genzano di Roma RM 16 23970 326563
Genazzano RM 16 6036 332599
Rocca di Cave RM 17 377 332976
Monte Compatri RM 17 11978 344954
Ariccia RM 18 19407 364361
Colonna RM 18 4287 368648
Capranica Prenestina RM 18 351 368999
Monte Porzio Catone RM 18 8693 377692
Paliano FR 18 8281 385973
Albano Laziale RM 19 41715 427688
Gallicano nel Lazio RM 19 6334 434022
Sermoneta LT 19 9842 443864
Castel Gandolfo RM 20 8997 452861
Gorga RM 20 710 453571
Marino RM 20 43026 496597

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km E of Velletri (53303 inhabitants)
23 Km NE of Aprilia (73446 inhabitants)
27 Km N of Latina (125985 inhabitants)
30 Km S of Tivoli (56533 inhabitants)
32 Km E of Pomezia (62966 inhabitants)
35 Km SE of Guidonia Montecelio (88673 inhabitants)
36 Km NE of Anzio (54211 inhabitants)
39 Km SE of Roma (2864731 inhabitants)
54 Km E of Fiumicino (78395 inhabitants)
84 Km SW of L'Aquila (69753 inhabitants)
97 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
Reviewed
Rev100 		Md 2.1 2022-01-02
21:46:48		 41.7068 12.8827 11 2022-01-02
22:17:50		 Sala Sismica INGV-Roma 99262441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-01-02 21:46:48 ± 0.14
Latitude 41.7068 ± 0.0090
Longitude 12.8827 ± 0.0096
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 99262441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 897
Semi-minor axis of confidence ellipse (meter) 780
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 218
Circular confidence region, given by single value of horizontal uncertainty (meter) 900.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 173
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.13939
Epicentral distance of station farthest from the epicenter (degree) 0.58726
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

Md:2.1

Field Value
Value 2.1
Uncertainty 0.1
Num. used stations 5
Type of magnitude Md
Reference to an origin 99262441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-01-02 22:17:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTCE.HHE. 2022-01-02T21:47:01.37 0.6 undecidable manual S 342 36.9297 50 0.11 64
IV.GUAR.HHE. 2022-01-02T21:47:01.54 0.6 undecidable manual S 75 36.8298 50 0.3 61
IV.FIAM.HHE. 2022-01-02T21:47:00.51 0.3 undecidable manual P 17 65.1903 50 0.11 90
IV.GIUL.HHE. 2022-01-02T21:47:00.81 0.6 undecidable manual S 118 34.9428 50 0.08 64
IV.PTQR.HHE. 2022-01-02T21:46:58.81 0.3 undecidable manual P 51 55.2003 50 -0.05 92
IV.MA9.HHE. 2022-01-02T21:46:56.32 0.6 undecidable manual S 291 19.7691 50 -0.36 61
IV.GIUL.HHE. 2022-01-02T21:46:55.33 0.6 undecidable manual P 118 34.9428 50 -0.41 59
IV.GUAR.HHE. 2022-01-02T21:46:55.87 0.6 undecidable manual P 75 36.8298 50 -0.16 62
IV.RCAV.EHE. 2022-01-02T21:46:55.66 0.6 undecidable manual S 18 16.3725 124 -0.09 66
IV.RDP.HHE. 2022-01-02T21:46:55.41 0.6 undecidable manual S 293 15.4734 125 -0.06 66
IV.MTCE.HHE. 2022-01-02T21:46:55.73 0.3 undecidable manual P 342 36.9297 50 -0.31 90
IV.MA9.HHE. 2022-01-02T21:46:54.16 0.3 undecidable manual P 291 19.7691 50 0.76 81
IV.RCAV.EHE. 2022-01-02T21:46:52.87 0.6 undecidable manual P 18 16.3725 124 0.01 66
IV.RDP.HHE. 2022-01-02T21:46:52.69 0.3 undecidable manual P 293 15.4734 125 -0.01 100
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