Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 13-01-2021 and time 09:24:59 (UTC) in region 1 km NW Colonna (RM)

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

  • 13-01-2021 09:24:59 (UTC)
  • 13-01-2021 10:24:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.8450, 12.7400 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
Colonna RM 2 4287 4287
Monte Porzio Catone RM 4 8693 12980
Monte Compatri RM 4 11978 24958
San Cesareo RM 6 15153 40111
Rocca Priora RM 6 11962 52073
Frascati RM 6 22087 74160
Gallicano nel Lazio RM 8 6334 80494
Zagarolo RM 8 17843 98337
Grottaferrata RM 9 20327 118664
Rocca di Papa RM 10 17034 135698
Marino RM 11 43026 178724
Ciampino RM 12 38412 217136
Palestrina RM 12 21672 238808
Castel San Pietro Romano RM 13 902 239710
Castel Gandolfo RM 13 8997 248707
Poli RM 14 2418 251125
Labico RM 14 6379 257504
San Gregorio da Sassola RM 14 1619 259123
Nemi RM 14 1943 261066
Casape RM 14 744 261810
Tivoli RM 14 56533 318343
Albano Laziale RM 14 41715 360058
Ariccia RM 15 19407 379465
Lariano RM 15 13432 392897
Genzano di Roma RM 16 23970 416867
Cave RM 16 11287 428154
Valmontone RM 17 15959 444113
Rocca di Cave RM 17 377 444490
Guidonia Montecelio RM 17 88673 533163
Capranica Prenestina RM 18 351 533514
Velletri RM 18 53303 586817
Castel Madama RM 18 7399 594216
Lanuvio RM 19 13632 607848
Artena RM 19 14276 622124
Genazzano RM 19 6036 628160
Pisoniano RM 20 770 628930
Fonte Nuova RM 20 32562 661492

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km SW of Tivoli (56533 inhabitants)
17 Km S of Guidonia Montecelio (88673 inhabitants)
18 Km N of Velletri (53303 inhabitants)
22 Km E of Roma (2864731 inhabitants)
28 Km NE of Pomezia (62966 inhabitants)
29 Km N of Aprilia (73446 inhabitants)
42 Km E of Fiumicino (78395 inhabitants)
44 Km NW of Latina (125985 inhabitants)
45 Km N of Anzio (54211 inhabitants)
78 Km SW of L'Aquila (69753 inhabitants)
80 Km S of Terni (111501 inhabitants)
82 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 2021-01-13
09:24:59		 41.8452 12.74 10 2021-07-12
16:55:00		 Bollettino Sismico Italiano INGV 87630201
Reviewed
Rev100 		ML 1.4 2021-01-13
09:24:59		 41.8523 12.7278 11 2021-01-13
09:36:46		 Sala Sismica INGV-Roma 86220651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-13 09:24:59 ± 0.08
Latitude 41.8452 ± 0.0045
Longitude 12.7400 ± 0.0060
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 87630201

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 504
Semi-minor axis of confidence ellipse (meter) 470
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 164
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.04227
Epicentral distance of station farthest from the epicenter (degree) 0.59175
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 87630201
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-02 18:32:34

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 86220651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-13 09:36:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TOLF.HHN. 2021-01-13T09:25:20.93 0.6 undecidable manual S 292 65.6898 50 0.7 38
IV.PTQR.HHZ. 2021-01-13T09:25:18.19 0.6 undecidable manual S 70 57.8976 50 0.03 46
IV.LATB.EHZ. 2021-01-13T09:25:13.91 0.3 undecidable manual S 155 43.1235 50 -0.29 67
IV.TOLF.HHN. 2021-01-13T09:25:12.07 0.3 undecidable manual P 292 65.6898 50 0.4 63
IV.PTQR.HHZ. 2021-01-13T09:25:10.32 0.3 undecidable manual P 70 57.8976 50 -0.15 67
IV.GIUL.HHZ. 2021-01-13T09:25:09.59 0.3 undecidable manual P 127 53.2023 50 -0.15 68
IV.LATB.EHZ. 2021-01-13T09:25:07.72 0.3 undecidable manual P 155 43.1235 50 -0.47 64
IV.MTCE.HHZ. 2021-01-13T09:25:07.28 0.3 undecidable manual S 1 19.6692 117 -0.34 69
IV.RCAV.EHZ. 2021-01-13T09:25:06.97 0.3 undecidable manual S 89 16.9719 120 0.18 72
IV.SAMA.EHZ. 2021-01-13T09:25:05.54 0.3 undecidable manual S 240 14.1747 125 -0.43 68
IV.VIVA.HHZ. 2021-01-13T09:25:05.33 0.3 undecidable manual S 167 10.7781 132 0.27 71
IV.MA9.HHN. 2021-01-13T09:25:04.59 0.6 undecidable manual S 219 10.6782 133 -0.44 46
IV.RDP.HHZ. 2021-01-13T09:25:04.92 0.3 undecidable manual S 195 9.6792 135 0.14 73
IV.MTCE.HHZ. 2021-01-13T09:25:04.34 0.3 undecidable manual P 1 19.6692 117 -0.05 73
IV.SAMA.EHZ. 2021-01-13T09:25:03.39 0.3 undecidable manual P 240 14.1747 125 -0.04 74
IV.RMP.HHZ. 2021-01-13T09:25:03.52 0.3 undecidable manual S 218 4.6953 155 -0.25 72
IV.VIVA.HHZ. 2021-01-13T09:25:03.35 0.3 undecidable manual P 167 10.7781 132 0.44 68
IV.RCAV.EHZ. 2021-01-13T09:25:03.94 0.3 undecidable manual P 89 16.9719 120 0.03 74
IV.RDP.HHZ. 2021-01-13T09:25:03.07 0.1 undecidable manual P 195 9.6792 135 0.32 94
IV.MA9.HHN. 2021-01-13T09:25:02.92 0.3 undecidable manual P 219 10.6782 133 0.03 75
IV.RMP.HHZ. 2021-01-13T09:25:02.22 0.1 undecidable manual P 218 4.6953 155 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RDP.HHN. ML:2.2 0.001949921 0.3392 AML other m 2021-01-13T09:25:05.51
IV.RDP.HHE. ML:2.0 0.001394713 0.5376 AML other m 2021-01-13T09:25:07.36
IV.MTCE.HHN. ML:1.5 0.0002512594 0.3584 AML other m 2021-01-13T09:25:07.69
IV.MTCE.HHE. ML:1.3 0.0001546272 0.64 AML other m 2021-01-13T09:25:09.73
IV.LATB.EHN. ML:1.3 0.00006280571 0.4608 AML other m 2021-01-13T09:25:14.12
IV.LATB.EHE. ML:1.1 0.000040072465000000004 0.4416 AML other m 2021-01-13T09:25:14.08
IV.GIUL.HHE. ML:1.3 0.000044398395 0.2176 AML other m 2021-01-13T09:25:18.60
IV.GIUL.HHN. ML:1.4 0.00006137538 0.224 AML other m 2021-01-13T09:25:19.37
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