Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 20-11-2019 and time 10:27:41 (Italy) in region 2 km NE Colonna (RM)

A magnitude ML 1.4 earthquake occured in region: 2 km NE Colonna (RM), on

  • 20-11-2019 09:27:41 (UTC)
  • 20-11-2019 10:27:41 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.8520, 12.7680 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
San Cesareo RM 4 15153 19440
Gallicano nel Lazio RM 5 6334 25774
Zagarolo RM 5 17843 43617
Monte Compatri RM 5 11978 55595
Monte Porzio Catone RM 6 8693 64288
Rocca Priora RM 6 11962 76250
Frascati RM 9 22087 98337
Palestrina RM 10 21672 120009
Castel San Pietro Romano RM 11 902 120911
Grottaferrata RM 11 20327 141238
Rocca di Papa RM 11 17034 158272
Poli RM 11 2418 160690
San Gregorio da Sassola RM 12 1619 162309
Casape RM 12 744 163053
Labico RM 12 6379 169432
Tivoli RM 13 56533 225965
Marino RM 13 43026 268991
Cave RM 14 11287 280278
Lariano RM 15 13432 293710
Ciampino RM 15 38412 332122
Rocca di Cave RM 15 377 332499
Valmontone RM 15 15959 348458
Castel Gandolfo RM 15 8997 357455
Nemi RM 15 1943 359398
Capranica Prenestina RM 15 351 359749
Castel Madama RM 16 7399 367148
Albano Laziale RM 16 41715 408863
Ariccia RM 17 19407 428270
Guidonia Montecelio RM 17 88673 516943
Genazzano RM 17 6036 522979
Pisoniano RM 17 770 523749
Genzano di Roma RM 17 23970 547719
Artena RM 18 14276 561995
San Vito Romano RM 18 3273 565268
Velletri RM 18 53303 618571
Ciciliano RM 19 1336 619907
San Polo dei Cavalieri RM 19 2992 622899
Marcellina RM 19 7280 630179
Lanuvio RM 20 13632 643811

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km S of Tivoli (56533 inhabitants)
17 Km S of Guidonia Montecelio (88673 inhabitants)
18 Km N of Velletri (53303 inhabitants)
24 Km E of Roma (2864731 inhabitants)
30 Km NE of Pomezia (62966 inhabitants)
30 Km NE of Aprilia (73446 inhabitants)
44 Km N of Latina (125985 inhabitants)
45 Km E of Fiumicino (78395 inhabitants)
46 Km N of Anzio (54211 inhabitants)
76 Km SW of L'Aquila (69753 inhabitants)
80 Km S of Terni (111501 inhabitants)
83 Km SE of Viterbo (67173 inhabitants)
85 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 2019-11-20
09:27:41		 41.8522 12.7682 10 2020-02-28
16:42:07		 Bollettino Sismico Italiano INGV 73933101
Reviewed
Rev100 		ML 1.6 2019-11-20
09:27:42		 41.8708 12.7602 6 2019-11-20
10:46:14		 Sala Sismica INGV-Roma 73932791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-11-20 09:27:41 ± 0.04
Latitude 41.8522 ± 0.0018
Longitude 12.7682 ± 0.0036
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 73933101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 254
Semi-minor axis of confidence ellipse (meter) 224
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 285
Circular confidence region, given by single value of horizontal uncertainty (meter) 250.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.71586
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 73933101
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-11-20 11:28:53

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 73932791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-11-20 10:46:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.POFI.HNE. 2019-11-20T09:28:05.74 0.6 undecidable manual S 101 79.4649 50 0.01 45
IV.PTQR.HHZ. 2019-11-20T09:27:59.40 0.6 undecidable manual S 70 55.5 50 0.08 46
IV.GIUL.HHZ. 2019-11-20T09:27:58.47 0.6 undecidable manual S 129 51.8037 50 0.13 46
IV.GUAR.HNN. 2019-11-20T09:27:56.57 0.6 undecidable manual S 98 45.4212 50 -0.06 47
IT.MMP1.HGE. 2019-11-20T09:27:56.31 0.3 undecidable manual S 358 44.1225 50 0.04 71
IV.POFI.HNE. 2019-11-20T09:27:55.48 0.6 undecidable manual P 101 79.4649 50 -0.13 44
IV.LATB.EHZ. 2019-11-20T09:27:55.73 0.3 undecidable manual S 158 42.9237 50 -0.22 69
IV.PTQR.HHZ. 2019-11-20T09:27:52.07 0.3 undecidable manual P 70 55.5 50 0.16 68
IT.VNF1.HGZ. 2019-11-20T09:27:51.08 3.0 positive manual P 0 0
IV.GIUL.HHZ. 2019-11-20T09:27:51.26 0.3 undecidable manual P 129 51.8037 50 -0.08 70
IV.GUAR.HNN. 2019-11-20T09:27:50.66 1.0 undecidable manual P 98 45.4212 50 0.3 22
IT.MMP1.HGE. 2019-11-20T09:27:50.06 0.6 undecidable manual P 358 44.1225 50 -0.09 47
IV.MTCE.HHZ. 2019-11-20T09:27:49.32 0.3 undecidable manual S 354 19.0698 117 0.08 74
IV.CERT.HHZ. 2019-11-20T09:27:49.38 0.3 undecidable manual S 59 20.6682 116 -0.36 69
IV.LATB.EHZ. 2019-11-20T09:27:49.86 0.6 undecidable manual P 158 42.9237 50 -0.11 47
IV.SAMA.EHN. 2019-11-20T09:27:48.21 0.3 undecidable manual S 241 16.5723 121 -0.28 71
IV.VIVA.HHN. 2019-11-20T09:27:47.05 0.6 undecidable manual S 179 11.2776 131 0.05 50
IV.RDP.HHE. 2019-11-20T09:27:47.15 0.6 undecidable manual S 205 11.2776 131 0.16 49
IV.RCAV.EHE. 2019-11-20T09:27:47.95 0.3 undecidable manual S 92 14.6742 124 0.02 75
IV.MTCE.HHZ. 2019-11-20T09:27:46.05 0.1 undecidable manual P 354 19.0698 117 -0.04 99
IV.CERT.HHZ. 2019-11-20T09:27:46.36 0.1 negative manual P 59 20.6682 116 -0.02 99
IV.RCAV.EHE. 2019-11-20T09:27:45.59 0.3 undecidable manual P 92 14.6742 124 0.26 72
IV.RMP.HHZ. 2019-11-20T09:27:45.77 0.3 undecidable manual S 230 7.0929 144 -0.25 73
IV.SAMA.EHN. 2019-11-20T09:27:45.77 0.1 undecidable manual P 241 16.5723 121 0.11 98
IV.RDP.HHE. 2019-11-20T09:27:45.06 0.1 undecidable manual P 205 11.2776 131 0.27 96
IV.RMP.HHZ. 2019-11-20T09:27:44.33 0.1 negative manual P 230 7.0929 144 0.1 100
IV.VIVA.HHN. 2019-11-20T09:27:44.64 1.0 undecidable manual P 179 11.2776 131 -0.16 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RMP.HHE. ML:2.0 0.00149 1.64 AML other m 2019-11-20T09:27:45.08
IV.RMP.HHN. ML:1.9 0.001195 0.26 AML other m 2019-11-20T09:27:46.40
IV.CERT.HHN. ML:1.3 0.000157 0.22 AML other m 2019-11-20T09:27:50.36
IV.CERT.HHE. ML:1.4 0.00016350000000000002 0.6 AML other m 2019-11-20T09:27:51.39
IV.MTCE.HHN. ML:1.0 0.000075259875 0.4416 AML other m 2019-11-20T09:27:49.52
IV.MTCE.HHE. ML:1.1 0.000097776545 0.32 AML other m 2019-11-20T09:27:50.08
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