Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 30-12-2017 and time 12:44:36 (UTC) in region 2 km N Colonna (RM)

A magnitude ML 2.0 earthquake occured in region: 2 km N Colonna (RM), on

  • 30-12-2017 12:44:36 (UTC)
  • 30-12-2017 13:44:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.8510, 12.7480 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 5 8693 12980
Monte Compatri RM 5 11978 24958
San Cesareo RM 6 15153 40111
Rocca Priora RM 6 11962 52073
Gallicano nel Lazio RM 7 6334 58407
Zagarolo RM 7 17843 76250
Frascati RM 7 22087 98337
Grottaferrata RM 10 20327 118664
Rocca di Papa RM 10 17034 135698
Marino RM 12 43026 178724
Palestrina RM 12 21672 200396
Castel San Pietro Romano RM 12 902 201298
Poli RM 13 2418 203716
San Gregorio da Sassola RM 13 1619 205335
Casape RM 13 744 206079
Ciampino RM 13 38412 244491
Tivoli RM 13 56533 301024
Labico RM 14 6379 307403
Castel Gandolfo RM 14 8997 316400
Nemi RM 15 1943 318343
Lariano RM 15 13432 331775
Albano Laziale RM 15 41715 373490
Cave RM 16 11287 384777
Ariccia RM 16 19407 404184
Valmontone RM 16 15959 420143
Rocca di Cave RM 16 377 420520
Genzano di Roma RM 17 23970 444490
Guidonia Montecelio RM 17 88673 533163
Capranica Prenestina RM 17 351 533514
Castel Madama RM 17 7399 540913
Velletri RM 18 53303 594216
Artena RM 19 14276 608492
Pisoniano RM 19 770 609262
Genazzano RM 19 6036 615298
Lanuvio RM 19 13632 628930
Fonte Nuova RM 19 32562 661492
San Polo dei Cavalieri RM 20 2992 664484
Marcellina RM 20 7280 671764
San Vito Romano RM 20 3273 675037

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 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)
29 Km NE of Pomezia (62966 inhabitants)
30 Km N of Aprilia (73446 inhabitants)
43 Km E of Fiumicino (78395 inhabitants)
45 Km N of Latina (125985 inhabitants)
46 Km N of Anzio (54211 inhabitants)
77 Km SW of L'Aquila (69753 inhabitants)
79 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 		Md 1.9
ML 2.0 		2017-12-30
12:44:36		 41.8513 12.7482 10 2018-09-04
09:10:40		 Bollettino Sismico Italiano INGV 53087801
Reviewed
Rev100 		ML 1.9 2017-12-30
12:44:36		 41.8423 12.7367 9 2017-12-30
12:55:58		 Sala Sismica INGV-Roma 52912021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-12-30 12:44:36 ± 0.09
Latitude 41.8513 ± 0.0036
Longitude 12.7482 ± 0.0072
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 53087801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 626
Semi-minor axis of confidence ellipse (meter) 224
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 286
Circular confidence region, given by single value of horizontal uncertainty (meter) 630.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
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) 0.05306
Epicentral distance of station farthest from the epicenter (degree) 0.49822
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 52912021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-12-30 12:55:58

ML:2.0

Field Value
Value 2.0
Uncertainty 0.4
Num. used stations 9
Type of magnitude ML
Reference to an origin 53087801
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-03-10 13:38:17

Md:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude Md
Reference to an origin 53087801
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-03-10 13:38:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FIAM.HHE. 2017-12-30T12:44:54.16 0.3 undecidable manual S 33 55.3002 50 0.25 67
IV.GIUL.HHE. 2017-12-30T12:44:53.81 0.3 undecidable manual S 128 53.1024 50 0.5 64
IV.LATB.EHZ. 2017-12-30T12:44:50.44 0.3 undecidable manual S 156 43.4232 50 -0.3 67
IV.FIAM.HHE. 2017-12-30T12:44:46.42 0.3 undecidable manual P 33 55.3002 50 -0.08 69
IV.GIUL.HHE. 2017-12-30T12:44:45.96 0.1 undecidable manual P 128 53.1024 50 -0.19 90
IV.CERT.HHZ. 2017-12-30T12:44:44.54 0.1 undecidable manual S 61 22.1556 114 -0.23 95
IV.LATB.EHZ. 2017-12-30T12:44:44.25 0.1 undecidable manual P 156 43.4232 50 -0.42 88
IV.LAV9.HHZ. 2017-12-30T12:44:44.06 0.1 undecidable manual S 192 19.6692 116 0.06 99
IV.MTCE.HHZ. 2017-12-30T12:44:43.87 0.1 undecidable manual S 359 19.0698 117 0.08 98
IV.RCAV.EHZ. 2017-12-30T12:44:43.09 0.3 undecidable manual S 92 16.2726 121 0.12 73
IV.RDP.HHZ. 2017-12-30T12:44:41.58 0.3 undecidable manual S 197 10.5783 133 0.22 73
IV.LAV9.HHZ. 2017-12-30T12:44:41.24 0.1 undecidable manual P 192 19.6692 116 0.46 91
IV.CERT.HHZ. 2017-12-30T12:44:41.10 0.1 positive manual P 61 22.1556 114 -0.12 97
IV.VIVA.HHZ. 2017-12-30T12:44:41.37 0.3 undecidable manual S 171 11.3775 131 -0.2 73
IV.RCAV.EHZ. 2017-12-30T12:44:40.41 0.3 undecidable manual P 92 16.2726 121 0.22 72
IV.MTCE.HHZ. 2017-12-30T12:44:40.72 0.3 negative manual P 359 19.0698 117 0.06 74
IV.RMP.HHZ. 2017-12-30T12:44:39.97 0.3 undecidable manual S 220 5.8941 149 -0.35 71
IV.VIVA.HHZ. 2017-12-30T12:44:39.60 0.1 undecidable manual P 171 11.3775 131 0.22 97
IV.RDP.HHZ. 2017-12-30T12:44:39.33 0.1 negative manual P 197 10.5783 133 0.07 100
IV.RMP.HHZ. 2017-12-30T12:44:38.45 0.1 positive manual P 220 5.8941 149 -0.21 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RMP.HHN. ML:2.7 0.00933 0.4 AML other m 2017-12-30T12:44:39.72
IV.RDP.HHN. ML:2.6 0.00469 0.56 AML other m 2017-12-30T12:44:41.48
IV.RDP.HHE. ML:2.4 0.00286 0.36 AML other m 2017-12-30T12:44:43.62
IV.MTCE.HHN. ML:1.8 0.00049 0.38 AML other m 2017-12-30T12:44:44.22
IV.MTCE.HHE. ML:1.6 0.000309 0.38 AML other m 2017-12-30T12:44:44.30
IV.RCAV.EHE. ML:1.6 0.0003820828 0.94 AML other m 2017-12-30T12:44:45.03
IV.CERT.HHE. ML:1.8 0.0004605 0.76 AML other m 2017-12-30T12:44:46.49
IV.CERT.HHN. ML:1.5 0.00020601839999999998 1.7 AML other m 2017-12-30T12:44:47.89
IV.VIVA.HHN. ML:2.4 0.00275 1.08 AML other m 2017-12-30T12:44:48.97
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