Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.2 on date 13-01-1990 and time 22:44:47 (UTC) in region 3 km NW Colonna (RM)

A magnitude Md 2.2 earthquake occured in region: 3 km NW Colonna (RM), on

  • 13-01-1990 22:44:47 (UTC)
  • 13-01-1990 23:44:47 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.8560, 12.7350 at 6 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 3 4287 4287
Monte Porzio Catone RM 5 8693 12980
Monte Compatri RM 5 11978 24958
San Cesareo RM 7 15153 40111
Frascati RM 7 22087 62198
Rocca Priora RM 7 11962 74160
Gallicano nel Lazio RM 8 6334 80494
Zagarolo RM 8 17843 98337
Grottaferrata RM 9 20327 118664
Rocca di Papa RM 11 17034 135698
Marino RM 11 43026 178724
Ciampino RM 12 38412 217136
Palestrina RM 13 21672 238808
Tivoli RM 13 56533 295341
Castel San Pietro Romano RM 13 902 296243
San Gregorio da Sassola RM 13 1619 297862
Poli RM 14 2418 300280
Casape RM 14 744 301024
Castel Gandolfo RM 14 8997 310021
Labico RM 15 6379 316400
Nemi RM 15 1943 318343
Albano Laziale RM 15 41715 360058
Ariccia RM 16 19407 379465
Guidonia Montecelio RM 16 88673 468138
Lariano RM 16 13432 481570
Genzano di Roma RM 17 23970 505540
Cave RM 17 11287 516827
Castel Madama RM 17 7399 524226
Valmontone RM 18 15959 540185
Rocca di Cave RM 18 377 540562
Capranica Prenestina RM 18 351 540913
Fonte Nuova RM 18 32562 573475
Velletri RM 19 53303 626778
Pisoniano RM 20 770 627548
Marcellina RM 20 7280 634828
San Polo dei Cavalieri RM 20 2992 637820
Lanuvio RM 20 13632 651452
Artena RM 20 14276 665728
Genazzano RM 20 6036 671764
Sant'Angelo Romano RM 20 5018 676782

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km SW of Tivoli (56533 inhabitants)
16 Km S of Guidonia Montecelio (88673 inhabitants)
19 Km N of Velletri (53303 inhabitants)
21 Km E of Roma (2864731 inhabitants)
28 Km NE of Pomezia (62966 inhabitants)
30 Km N of Aprilia (73446 inhabitants)
42 Km E of Fiumicino (78395 inhabitants)
45 Km NW of Latina (125985 inhabitants)
46 Km N of Anzio (54211 inhabitants)
78 Km SW of L'Aquila (69753 inhabitants)
79 Km S of Terni (111501 inhabitants)
81 Km SE of Viterbo (67173 inhabitants)
82 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 2.2
ML-VAX 1.5 		1990-01-13
22:44:47		 41.856 12.735 6 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 107819
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-01-13 22:44:47 ± 0.101
Latitude 41.8560 ± 0.0097
Longitude 12.7350 ± 0.0111
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 107819

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 1419.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 147
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00040
Epicentral distance of station farthest from the epicenter (degree) 0.00469
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 107819
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:40:22

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 107819
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.MNS.Z. 1990-01-13T22:44:59.00 10.0 undecidable manual PG 355 0.5217 0.04 1
--.CP9.Z. 1990-01-13T22:44:54.52 10.0 undecidable manual SG 88 0.1665 0.38 0.1
--.CP9.Z. 1990-01-13T22:44:51.12 10.0 undecidable manual PG 88 0.1665 -0.26 0.7
--.RDP.Z. 1990-01-13T22:44:51.78 10.0 undecidable manual SG 187 0.0999 -0.13 0.7
--.RMP.Z. 1990-01-13T22:44:50.42 10.0 undecidable manual SG 208 0.0444 0 0.9
--.RDP.Z. 1990-01-13T22:44:50.20 10.0 undecidable manual PG 187 0.0999 0.13 1.6
--.RMP.Z. 1990-01-13T22:44:49.22 10.0 undecidable manual PG 208 0.0444 -0.01 2.1
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