Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 22-01-2023 and time 01:59:11 (Italy) in region 8 km NW Colonna (RM)

A magnitude ML 1.3 earthquake occured in region: 8 km NW Colonna (RM), on

  • 22-01-2023 00:59:11 (UTC)
  • 22-01-2023 01:59:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.9040, 12.7240 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
Colonna RM 8 4287 4287
Gallicano nel Lazio RM 9 6334 10621
Tivoli RM 9 56533 67154
Monte Porzio Catone RM 10 8693 75847
Monte Compatri RM 11 11978 87825
Guidonia Montecelio RM 11 88673 176498
San Cesareo RM 11 15153 191651
Zagarolo RM 11 17843 209494
Frascati RM 11 22087 231581
Rocca Priora RM 13 11962 243543
San Gregorio da Sassola RM 13 1619 245162
Grottaferrata RM 14 20327 265489
Fonte Nuova RM 14 32562 298051
Casape RM 14 744 298795
Poli RM 14 2418 301213
Castel Madama RM 15 7399 308612
Sant'Angelo Romano RM 15 5018 313630
Ciampino RM 15 38412 352042
Marcellina RM 15 7280 359322
Castel San Pietro Romano RM 16 902 360224
Palestrina RM 16 21672 381896
San Polo dei Cavalieri RM 16 2992 384888
Rocca di Papa RM 16 17034 401922
Marino RM 16 43026 444948
Mentana RM 16 22921 467869
Castel Gandolfo RM 18 8997 476866
Palombara Sabina RM 19 13269 490135
Vicovaro RM 19 4019 494154
Monterotondo RM 19 40830 534984
Labico RM 19 6379 541363
Ciciliano RM 19 1336 542699
Rocca di Cave RM 20 377 543076
Capranica Prenestina RM 20 351 543427
Pisoniano RM 20 770 544197
Cave RM 20 11287 555484
Roma RM 20 2864731 3420215
Albano Laziale RM 20 41715 3461930

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km SW of Tivoli (56533 inhabitants)
11 Km S of Guidonia Montecelio (88673 inhabitants)
20 Km E of Roma (2864731 inhabitants)
25 Km N of Velletri (53303 inhabitants)
32 Km NE of Pomezia (62966 inhabitants)
35 Km N of Aprilia (73446 inhabitants)
43 Km E of Fiumicino (78395 inhabitants)
51 Km NW of Latina (125985 inhabitants)
51 Km N of Anzio (54211 inhabitants)
74 Km S of Terni (111501 inhabitants)
75 Km SW of L'Aquila (69753 inhabitants)
77 Km SE of Viterbo (67173 inhabitants)
80 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 1.3 2023-01-22
00:59:11		 41.9035 12.7237 11 2024-03-01
17:18:14		 Bollettino Sismico Italiano INGV 119966481
Reviewed
Rev100 		ML 1.3 2023-01-22
00:59:11		 41.8992 12.7107 11 2023-01-22
01:18:22		 Sala Sismica INGV-Roma 113722131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-22 00:59:11 ± 0.06
Latitude 41.9035 ± 0.0027
Longitude 12.7237 ± 0.0048
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 119966481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 402
Semi-minor axis of confidence ellipse (meter) 303
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 252
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 44
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.67629
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.5
Num. used stations 12
Type of magnitude ML
Reference to an origin 119966481
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-08-09 10:28:21

ML:1.3

Field Value
Value 1.3
Uncertainty 0.5
Num. used stations 12
Type of magnitude ML
Reference to an origin 113722131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-22 01:18:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
NI.PALA.HHZ. 2023-01-22T01:00:48.16 3.0 undecidable manual Sg -3.66 0
MN.TIR.HHZ. 2023-01-22T01:00:41.95 3.0 undecidable manual Pg 14.88 0
IV.MSSA.HHZ. 2023-01-22T01:00:33.26 3.0 undecidable manual Sg 5.05 0
GU.GSCL.HHZ. 2023-01-22T01:00:07.86 3.0 undecidable manual Sg -8.41 0
IV.ORI.HHZ. 2023-01-22T01:00:02.36 3.0 negative manual Pn 1.02 0
NI.PALA.HHZ. 2023-01-22T00:59:45.15 3.0 undecidable manual Pn -9.99 0
IV.MTMR.EHZ. 2023-01-22T00:59:42.88 3.0 positive manual Pg 0.84 0
IV.BARO.EHZ. 2023-01-22T00:59:33.34 0.6 undecidable manual S 305 67.2771 50 0.98 34
IV.TOLF.HHE. 2023-01-22T00:59:30.81 0.6 undecidable manual S 287 62.2932 50 -0.21 45
IV.GIUL.HHZ. 2023-01-22T00:59:30.24 0.6 undecidable manual S 131 58.2972 50 0.28 44
IV.FIAM.HHE. 2023-01-22T00:59:28.74 0.6 undecidable manual S 39 51.8037 50 0.51 43
IV.GUAR.HNN. 2023-01-22T00:59:27.72 0.6 undecidable manual S 104 50.1165 50 -0.06 47
IV.LATB.EHE. 2023-01-22T00:59:27.24 0.6 undecidable manual S 156 49.5171 50 -0.39 44
IV.SRES.HHZ. 2023-01-22T00:59:25.24 0.6 undecidable manual S 335 40.9257 50 -0.1 48
IV.TRIF.CHZ. 2023-01-22T00:59:25.88 3.0 undecidable manual Pg -5.74 0
IT.MMP1.HGZ. 2023-01-22T00:59:24.45 0.3 undecidable manual S 3 38.4282 50 -0.2 70
IT.CSO1.HGZ. 2023-01-22T00:59:24.93 0.6 undecidable manual S 54 37.1295 50 0.61 42
IV.ARRO.EHZ. 2023-01-22T00:59:24.78 0.3 undecidable manual P 3 75.0693 50 -0.12 67
IV.BARO.EHZ. 2023-01-22T00:59:23.65 0.3 undecidable manual P 305 67.2771 50 -0.06 69
IV.TOLF.HHE. 2023-01-22T00:59:22.67 0.3 undecidable manual P 287 62.2932 50 -0.27 67
IV.LAV9.HNZ. 2023-01-22T00:59:21.13 0.6 undecidable manual S 185 25.1526 50 0.02 49
IV.GIUL.HHZ. 2023-01-22T00:59:21.98 0.3 undecidable manual P 131 58.2972 50 -0.34 66
IV.FIAM.HHE. 2023-01-22T00:59:21.09 0.1 undecidable manual P 39 51.8037 50 -0.23 91
IT.RMMM.HGN. 2023-01-22T00:59:20.68 1.0 undecidable manual S 276 22.4553 50 0.27 24
IV.CERT.HHZ. 2023-01-22T00:59:20.36 0.6 undecidable manual S 77 21.867 50 0.11 49
IV.GUAR.HNN. 2023-01-22T00:59:20.58 0.3 undecidable manual P 104 50.1165 50 -0.48 65
IV.LATB.EHE. 2023-01-22T00:59:20.60 0.3 undecidable manual P 156 49.5171 50 -0.38 67
IT.CSO1.HGZ. 2023-01-22T00:59:19.08 0.3 undecidable manual P 54 37.1295 50 0.01 73
IV.SRES.HHZ. 2023-01-22T00:59:19.23 0.3 undecidable manual P 335 40.9257 50 -0.42 67
IV.VIVA.HHE. 2023-01-22T00:59:19.32 0.6 undecidable manual S 167 17.4714 122 0.31 48
IT.MMP1.HGZ. 2023-01-22T00:59:19.06 1.0 undecidable manual P 3 38.4282 50 -0.2 23
IV.MA9.HHN. 2023-01-22T00:59:18.26 0.3 undecidable manual S 200 15.7731 124 -0.26 72
IV.RDP.HHZ. 2023-01-22T00:59:18.69 0.6 undecidable manual S 184 15.873 124 0.13 50
IV.MTCE.HHZ. 2023-01-22T00:59:17.77 0.6 undecidable manual S 7 13.2756 129 -0.07 49
IV.LAV9.HNZ. 2023-01-22T00:59:17.44 0.6 undecidable manual P 185 25.1526 50 0.23 47
IV.VIVA.HHE. 2023-01-22T00:59:16.23 0.3 undecidable manual P 167 17.4714 122 0.23 73
IT.RMMM.HGN. 2023-01-22T00:59:16.82 0.3 undecidable manual P 276 22.4553 50 0.01 75
IV.CERT.HHZ. 2023-01-22T00:59:16.87 0.3 undecidable manual P 77 21.867 50 0.16 73
IV.RMP.HHZ. 2023-01-22T00:59:16.85 0.3 undecidable manual S 189 10.2786 136 -0.21 73
IV.ROM9.HNE. 2023-01-22T00:59:16.54 0.3 undecidable manual P 244 19.0698 50 0.25 72
IV.RDP.HHZ. 2023-01-22T00:59:16.16 0.3 undecidable manual P 184 15.873 124 0.42 70
IV.RMP.HHZ. 2023-01-22T00:59:15.23 0.3 undecidable manual P 189 10.2786 136 0.35 72
IV.MTCE.HHZ. 2023-01-22T00:59:15.47 0.1 undecidable manual P 7 13.2756 129 0.15 100
IV.MA9.HHN. 2023-01-22T00:59:15.71 0.3 undecidable manual P 200 15.7731 124 -0.01 76
IV.CESI.HHZ. 2023-01-22T00:59:10.09 3.0 undecidable manual Pn -9.99 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RMP.HHN. ML:2.2 0.00202 0.74 AML other m 2023-01-22T00:59:18.10
IV.MTCE.HHE. ML:1.1 0.0001207745 1.68 AML other m 2023-01-22T00:59:18.12
IV.RMP.HHE. ML:2.2 0.001945 0.1 AML other m 2023-01-22T00:59:18.29
IV.CERT.HNE. ML:1.3 0.00014182593999999998 1.1504 AML other m 2023-01-22T00:59:18.32
IV.MTCE.HHN. ML:1.0 0.00010087036499999999 0.3 AML other m 2023-01-22T00:59:18.82
IV.RDP.HHE. ML:1.9 0.00075056895 1.62 AML other m 2023-01-22T00:59:18.10
IV.RDP.HHN. ML:1.9 0.00077537175 0.16 AML other m 2023-01-22T00:59:19.44
IV.CERT.HHN. ML:1.2 0.00009293204500000001 1.84 AML other m 2023-01-22T00:59:21.95
IV.CERT.HHE. ML:0.9 0.00004988985 0.24 AML other m 2023-01-22T00:59:22.29
IV.BARO.HNN. ML:2.0 0.000162 1.06 AML other m 2023-01-22T00:59:27.34
IV.GIUL.HHE. ML:0.8 0.0000146651085 1.46 AML other m 2023-01-22T00:59:30.17
IV.GIUL.HHN. ML:1.0 0.0000178154965 1.78 AML other m 2023-01-22T00:59:34.00
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