Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.0 on date 05-12-1989 and time 08:40:25 (Italy) in region 4 km NW Colonna (RM)

A magnitude Md 2.0 earthquake occured in region: 4 km NW Colonna (RM), on

  • 05-12-1989 07:40:25 (UTC)
  • 05-12-1989 08:40:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.8640, 12.7320 at 7 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
San Cesareo RM 7 15153 40111
Gallicano nel Lazio RM 8 6334 46445
Frascati RM 8 22087 68532
Rocca Priora RM 8 11962 80494
Zagarolo RM 9 17843 98337
Grottaferrata RM 10 20327 118664
Rocca di Papa RM 11 17034 135698
Marino RM 12 43026 178724
Tivoli RM 13 56533 235257
Ciampino RM 13 38412 273669
San Gregorio da Sassola RM 13 1619 275288
Palestrina RM 13 21672 296960
Casape RM 14 744 297704
Castel San Pietro Romano RM 14 902 298606
Poli RM 14 2418 301024
Castel Gandolfo RM 15 8997 310021
Guidonia Montecelio RM 15 88673 398694
Labico RM 16 6379 405073
Nemi RM 16 1943 407016
Albano Laziale RM 16 41715 448731
Ariccia RM 17 19407 468138
Castel Madama RM 17 7399 475537
Lariano RM 17 13432 488969
Cave RM 17 11287 500256
Fonte Nuova RM 18 32562 532818
Genzano di Roma RM 18 23970 556788
Rocca di Cave RM 18 377 557165
Valmontone RM 18 15959 573124
Capranica Prenestina RM 18 351 573475
Marcellina RM 19 7280 580755
San Polo dei Cavalieri RM 19 2992 583747
Sant'Angelo Romano RM 19 5018 588765
Pisoniano RM 20 770 589535
Velletri RM 20 53303 642838

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km SW of Tivoli (56533 inhabitants)
15 Km S of Guidonia Montecelio (88673 inhabitants)
20 Km N of Velletri (53303 inhabitants)
21 Km E of Roma (2864731 inhabitants)
29 Km NE of Pomezia (62966 inhabitants)
31 Km N of Aprilia (73446 inhabitants)
42 Km E of Fiumicino (78395 inhabitants)
46 Km NW of Latina (125985 inhabitants)
47 Km N of Anzio (54211 inhabitants)
77 Km SW of L'Aquila (69753 inhabitants)
78 Km S of Terni (111501 inhabitants)
80 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 2.0
ML-VAX 1.7 		1989-12-05
07:40:25		 41.864 12.732 7 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 105489
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-12-05 07:40:25 ± 0.14
Latitude 41.8640 ± 0.0222
Longitude 12.7320 ± 0.0092
Depth (km) 7 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 105489

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) 2581.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 152
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) 0.00049
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:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 105489
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:38:13

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 105489
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. 1989-12-05T07:40:44.78 10.0 undecidable manual SG 355 0.5217 -0.03 0.4
--.MNS.Z. 1989-12-05T07:40:36.68 10.0 undecidable manual PG 355 0.5217 -0.01 1
--.CP9.Z. 1989-12-05T07:40:32.40 10.0 undecidable manual SG 90 0.1665 -0.01 0.6
--.RDP.Z. 1989-12-05T07:40:30.70 10.0 undecidable manual SG 186 0.0999 -0.33 0
--.CP9.Z. 1989-12-05T07:40:29.54 10.0 positive manual PG 90 0.1665 0 3.2
--.RDP.Z. 1989-12-05T07:40:28.62 10.0 undecidable manual PG 186 0.0999 0.25 0.3
--.RMP.Z. 1989-12-05T07:40:27.48 10.0 undecidable manual PG 202 0.0555 -0.06 1.4
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