Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 20-01-2007 and time 09:26:32 (Italy) in region 5 km N Colonna (RM)

A magnitude ML 0.9 earthquake occured in region: 5 km N Colonna (RM), on

  • 20-01-2007 08:26:32 (UTC)
  • 20-01-2007 09:26:32 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.8830, 12.7540 at 5 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 5 4287 4287
Gallicano nel Lazio RM 6 6334 10621
San Cesareo RM 8 15153 25774
Zagarolo RM 8 17843 43617
Monte Porzio Catone RM 8 8693 52310
Monte Compatri RM 8 11978 64288
Rocca Priora RM 10 11962 76250
Tivoli RM 10 56533 132783
Frascati RM 10 22087 154870
San Gregorio da Sassola RM 11 1619 156489
Casape RM 11 744 157233
Poli RM 12 2418 159651
Palestrina RM 12 21672 181323
Castel San Pietro Romano RM 12 902 182225
Grottaferrata RM 13 20327 202552
Guidonia Montecelio RM 13 88673 291225
Rocca di Papa RM 14 17034 308259
Castel Madama RM 14 7399 315658
Marino RM 15 43026 358684
Ciampino RM 15 38412 397096
Labico RM 15 6379 403475
San Polo dei Cavalieri RM 16 2992 406467
Marcellina RM 16 7280 413747
Cave RM 16 11287 425034
Rocca di Cave RM 16 377 425411
Capranica Prenestina RM 17 351 425762
Fonte Nuova RM 17 32562 458324
Sant'Angelo Romano RM 17 5018 463342
Castel Gandolfo RM 17 8997 472339
Pisoniano RM 17 770 473109
Ciciliano RM 18 1336 474445
Valmontone RM 18 15959 490404
Nemi RM 18 1943 492347
Lariano RM 18 13432 505779
Albano Laziale RM 19 41715 547494
Vicovaro RM 19 4019 551513
Genazzano RM 19 6036 557549
San Vito Romano RM 19 3273 560822
Sambuci RM 19 925 561747
Ariccia RM 19 19407 581154
Mentana RM 19 22921 604075

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km SW of Tivoli (56533 inhabitants)
13 Km S of Guidonia Montecelio (88673 inhabitants)
22 Km N of Velletri (53303 inhabitants)
22 Km E of Roma (2864731 inhabitants)
32 Km NE of Pomezia (62966 inhabitants)
33 Km N of Aprilia (73446 inhabitants)
45 Km E of Fiumicino (78395 inhabitants)
48 Km N of Latina (125985 inhabitants)
49 Km N of Anzio (54211 inhabitants)
75 Km SW of L'Aquila (69753 inhabitants)
76 Km S of Terni (111501 inhabitants)
80 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 1.8
ML 0.9 		2007-01-20
08:26:32		 41.883 12.754 5 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 610619
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2007-01-20 08:26:32 ± 0.33
Latitude 41.8830 ± 0.0144
Longitude 12.7540 ± 0.0326
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 610619

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2789
Semi-minor axis of confidence ellipse (meter) 1474
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 75
Circular confidence region, given by single value of horizontal uncertainty (meter) 3138.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 165
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.83
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.18166
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 3
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 610619
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 11:39:05

Md:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 610619
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 11:39:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CERT.HHN. 2007-01-20T08:26:40.19 0.3 undecidable manual Sg 69 20.1687 0.863 30
IV.MTCE.BHE. 2007-01-20T08:26:38.05 0.3 undecidable manual Sg 357 15.4734 0.294 37
IV.RDP.BHZ. 2007-01-20T08:26:36.59 0.1 undecidable manual Sg 192 14.1747 -0.75 42
IV.RDP.BHZ. 2007-01-20T08:26:35.77 0.1 undecidable manual Pg 192 14.1747 0.64 88
IV.CERT.HHN. 2007-01-20T08:26:35.80 0.1 undecidable manual Pg 69 20.1687 -0.476 93
IV.MTCE.BHE. 2007-01-20T08:26:35.20 0.1 undecidable manual Pg 357 15.4734 -0.172 100
IV.PTCC.SHZ. 2007-01-20T08:26:24.63 10.0 undecidable manual Pg 0 0 0
IV.MURB.HHN. 2007-01-20T08:26:14.64 10.0 undecidable manual Pg 0 0 0
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