Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.3 on date 04-06-1989 and time 16:21:38 (Italy) in region 4 km NW Colonna (RM)

A magnitude Md 2.3 earthquake occured in region: 4 km NW Colonna (RM), on

  • 04-06-1989 14:21:38 (UTC)
  • 04-06-1989 16:21:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.8600, 12.7200 at 13 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 4 4287 4287
Monte Porzio Catone RM 5 8693 12980
Monte Compatri RM 6 11978 24958
Frascati RM 7 22087 47045
San Cesareo RM 8 15153 62198
Rocca Priora RM 8 11962 74160
Gallicano nel Lazio RM 9 6334 80494
Grottaferrata RM 9 20327 100821
Zagarolo RM 9 17843 118664
Rocca di Papa RM 11 17034 135698
Marino RM 11 43026 178724
Ciampino RM 12 38412 217136
Tivoli RM 13 56533 273669
Castel Gandolfo RM 14 8997 282666
San Gregorio da Sassola RM 14 1619 284285
Palestrina RM 14 21672 305957
Castel San Pietro Romano RM 15 902 306859
Casape RM 15 744 307603
Poli RM 15 2418 310021
Albano Laziale RM 15 41715 351736
Nemi RM 15 1943 353679
Guidonia Montecelio RM 16 88673 442352
Ariccia RM 16 19407 461759
Labico RM 16 6379 468138
Genzano di Roma RM 17 23970 492108
Lariano RM 17 13432 505540
Fonte Nuova RM 17 32562 538102
Castel Madama RM 18 7399 545501
Cave RM 18 11287 556788
Rocca di Cave RM 19 377 557165
Valmontone RM 19 15959 573124
Capranica Prenestina RM 19 351 573475
Sant'Angelo Romano RM 20 5018 578493
Marcellina RM 20 7280 585773
Roma RM 20 2864731 3450504
Velletri RM 20 53303 3503807
San Polo dei Cavalieri RM 20 2992 3506799
Lanuvio RM 20 13632 3520431

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)
20 Km E of Roma (2864731 inhabitants)
20 Km N of Velletri (53303 inhabitants)
28 Km NE of Pomezia (62966 inhabitants)
30 Km N of Aprilia (73446 inhabitants)
41 Km E of Fiumicino (78395 inhabitants)
46 Km NW of Latina (125985 inhabitants)
46 Km N of Anzio (54211 inhabitants)
78 Km S of Terni (111501 inhabitants)
78 Km SW of L'Aquila (69753 inhabitants)
80 Km SE of Viterbo (67173 inhabitants)
81 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 2.3
ML-VAX 1.7 		1989-06-04
14:21:38		 41.86 12.72 13 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 92689
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-06-04 14:21:38 ± 0.596
Latitude 41.8600 ± 0.0365
Longitude 12.7200 ± 0.0289
Depth (km) 13 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 92689

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) 4713.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 254
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00040
Epicentral distance of station farthest from the epicenter (degree) 0.00737
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:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 92689
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:26:54

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 92689
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
--.SDI.Z. 1989-06-04T14:22:07.52 10.0 undecidable manual SG 100 0.8214 0.59 0.1
--.SDI.Z. 1989-06-04T14:21:54.27 10.0 undecidable manual PG 100 0.8214 -0.63 0.1
--.CP9.Z. 1989-06-04T14:21:46.15 10.0 undecidable manual SG 89 0.1665 0 0.6
--.RDP.Z. 1989-06-04T14:21:43.69 10.0 undecidable manual SG 181 0.0999 -0.51 0.2
--.CP9.Z. 1989-06-04T14:21:43.13 10.0 undecidable manual PG 89 0.1665 0.23 1.2
--.RMP.Z. 1989-06-04T14:21:42.98 10.0 undecidable manual SG 194 0.0444 -0.22 0.5
--.RDP.Z. 1989-06-04T14:21:42.50 10.0 negative manual PG 181 0.0999 0.28 2.2
--.RMP.Z. 1989-06-04T14:21:41.16 10.0 positive manual PG 194 0.0444 -0.04 3.1
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