Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 20-01-2022 and time 20:10:21 (UTC) in region 1 km NW Tivoli (RM)

A magnitude ML 1.4 earthquake occured in region: 1 km NW Tivoli (RM), on

  • 20-01-2022 20:10:21 (UTC)
  • 20-01-2022 21:10:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.9700, 12.7890 at 11 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
Tivoli RM 1 56533 56533
Marcellina RM 6 7280 63813
Guidonia Montecelio RM 6 88673 152486
San Polo dei Cavalieri RM 7 2992 155478
Castel Madama RM 7 7399 162877
San Gregorio da Sassola RM 9 1619 164496
Sant'Angelo Romano RM 10 5018 169514
Vicovaro RM 10 4019 173533
Casape RM 11 744 174277
Palombara Sabina RM 11 13269 187546
Gallicano nel Lazio RM 11 6334 193880
Sambuci RM 13 925 194805
Poli RM 13 2418 197223
Ciciliano RM 13 1336 198559
Roccagiovine RM 13 263 198822
Mandela RM 13 917 199739
Saracinesco RM 14 185 199924
Fonte Nuova RM 14 32562 232486
Mentana RM 14 22921 255407
Zagarolo RM 15 17843 273250
Licenza RM 15 1011 274261
Colonna RM 15 4287 278548
Pisoniano RM 16 770 279318
Castel San Pietro Romano RM 16 902 280220
Monteflavio RM 16 1348 281568
Cerreto Laziale RM 16 1118 282686
San Cesareo RM 16 15153 297839
Moricone RM 17 2650 300489
Palestrina RM 17 21672 322161
Monterotondo RM 17 40830 362991
Cineto Romano RM 17 601 363592
Percile RM 17 255 363847
Anticoli Corrado RM 17 915 364762
Gerano RM 18 1263 366025
Monte Porzio Catone RM 18 8693 374718
Capranica Prenestina RM 18 351 375069
Roviano RM 18 1351 376420
Monte Compatri RM 18 11978 388398
Montorio Romano RM 19 1984 390382
San Vito Romano RM 19 3273 393655
Rocca di Cave RM 19 377 394032
Montelibretti RM 19 5323 399355
Marano Equo RM 19 779 400134
Rocca Priora RM 20 11962 412096
Rocca Canterano RM 20 196 412292

Municipalities with at least 50000 inhabitants

An earthquake occurred to
1 Km NW of Tivoli (56533 inhabitants)
6 Km SE of Guidonia Montecelio (88673 inhabitants)
27 Km E of Roma (2864731 inhabitants)
31 Km N of Velletri (53303 inhabitants)
41 Km NE of Pomezia (62966 inhabitants)
43 Km N of Aprilia (73446 inhabitants)
51 Km E of Fiumicino (78395 inhabitants)
57 Km N of Latina (125985 inhabitants)
59 Km N of Anzio (54211 inhabitants)
66 Km SW of L'Aquila (69753 inhabitants)
67 Km S of Terni (111501 inhabitants)
75 Km SE of Viterbo (67173 inhabitants)
83 Km E of Civitavecchia (52991 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 1.4 2022-01-20
20:10:21		 41.9698 12.7888 11 2022-07-08
12:33:27		 Bollettino Sismico Italiano INGV 100801011
Reviewed
Rev100 		ML 1.5 2022-01-20
20:10:21		 41.9728 12.7932 12 2022-01-20
20:17:33		 Sala Sismica INGV-Roma 99994521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-01-20 20:10:21 ± 0.09
Latitude 41.9698 ± 0.0045
Longitude 12.7888 ± 0.0060
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100801011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 489
Semi-minor axis of confidence ellipse (meter) 316
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 32
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.06295
Epicentral distance of station farthest from the epicenter (degree) 0.73205
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 100801011
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-04-12 17:13:18

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 99994521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-01-20 20:17:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.POFI.HHZ. 2022-01-20T20:10:45.95 0.6 undecidable manual S 110 81.252 90 0.03 60
IV.LNSS.HNZ. 2022-01-20T20:10:44.45 0.6 undecidable manual S 16 73.1712 90 0.69 52
IV.TOLF.HHZ. 2022-01-20T20:10:41.65 0.6 undecidable manual S 279 65.8896 90 -0.16 61
IV.GIUL.HHZ. 2022-01-20T20:10:40.51 0.6 undecidable manual S 140 59.6958 90 0.33 59
IV.PTQR.HHZ. 2022-01-20T20:10:37.86 0.6 undecidable manual S 83 50.7159 90 0.08 64
IV.POFI.HHZ. 2022-01-20T20:10:35.98 0.6 undecidable manual P 110 81.252 90 0.26 58
IV.FIAM.HHZ. 2022-01-20T20:10:35.55 0.6 undecidable manual S 39 42.7239 90 -0.08 63
IV.LNSS.HNZ. 2022-01-20T20:10:34.21 0.6 undecidable manual P 16 73.1712 90 -0.26 58
IV.SRES.HHE. 2022-01-20T20:10:33.90 0.6 undecidable manual S 322 37.5291 90 -0.34 62
IV.TOLF.HHZ. 2022-01-20T20:10:33.81 0.3 undecidable manual P 279 65.8896 90 0.47 84
IV.GIUL.HHZ. 2022-01-20T20:10:32.12 0.6 undecidable manual P 140 59.6958 90 -0.28 59
IV.RDP.HHE. 2022-01-20T20:10:31.07 0.6 undecidable manual S 196 24.1536 91 0.4 61
IT.CSO1.HGZ. 2022-01-20T20:10:31.89 0.6 undecidable manual S 59 28.6491 90 0.02 66
IV.PTQR.HHZ. 2022-01-20T20:10:30.76 0.6 undecidable manual P 83 50.7159 90 -0.26 60
IV.FIAM.HHZ. 2022-01-20T20:10:29.46 0.6 undecidable manual P 39 42.7239 90 -0.31 61
IV.CERT.HHZ. 2022-01-20T20:10:28.51 0.6 undecidable manual S 98 16.0728 92 -0.01 67
IV.SRES.HHE. 2022-01-20T20:10:28.81 0.6 undecidable manual P 322 37.5291 90 -0.16 64
IV.RCAV.EHZ. 2022-01-20T20:10:28.88 0.6 undecidable manual S 136 18.7701 91 -0.35 63
IT.CSO1.HGZ. 2022-01-20T20:10:27.48 0.3 undecidable manual P 59 28.6491 90 -0.12 97
IV.MTCE.HHZ. 2022-01-20T20:10:26.31 0.6 undecidable manual S 327 6.993 136 -0.03 69
IV.RDP.HHE. 2022-01-20T20:10:26.50 0.3 undecidable manual P 196 24.1536 91 -0.41 93
IV.CERT.HHZ. 2022-01-20T20:10:25.80 0.3 undecidable manual P 98 16.0728 92 0.13 100
IV.RCAV.EHZ. 2022-01-20T20:10:25.99 0.3 undecidable manual P 136 18.7701 91 -0.09 100
IV.MTCE.HHZ. 2022-01-20T20:10:24.60 0.3 undecidable manual P 327 6.993 136 0.19 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTCE.HHE. ML:1.6 0.000523 0.34 AML other m 2022-01-20T20:10:26.51
IV.MTCE.HHN. ML:1.1 0.0001882314 0.1024 AML other m 2022-01-20T20:10:26.76
IV.CERT.HNN. ML:1.7 0.00043441920000000003 0.1024 AML other m 2022-01-20T20:10:29.28
IV.CERT.HHN. ML:1.8 0.00048303565 0.1152 AML other m 2022-01-20T20:10:29.29
IV.CERT.HNE. ML:1.7 0.0004319051 0.1664 AML other m 2022-01-20T20:10:29.36
IV.RCAV.EHE. ML:1.3 0.00015240915 1.9232 AML other m 2022-01-20T20:10:29.98
IV.CERT.HHE. ML:1.3 0.0001847637 1.6544 AML other m 2022-01-20T20:10:30.97
IV.RCAV.EHN. ML:1.3 0.0001603344 0.1024 AML other m 2022-01-20T20:10:30.53
IV.FIAM.HHN. ML:0.8 0.000017925284999999998 0.3456 AML other m 2022-01-20T20:10:36.31
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