Earthquake with magnitude of Md 2.0 on date 21-11-1989 and time 05:21:43 (UTC) in region 2 km E Castel Gandolfo (RM)

A magnitude Md 2.0 earthquake occured in region: 2 km E Castel Gandolfo (RM), on

  • 21-11-1989 05:21:43 (UTC)
  • 21-11-1989 06:21:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.75, 12.67 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Castel Gandolfo RM 2 8997 8997
Marino RM 2 43026 52023
Albano Laziale RM 3 41715 93738
Rocca di Papa RM 3 17034 110772
Ariccia RM 3 19407 130179
Grottaferrata RM 4 20327 150506
Nemi RM 5 1943 152449
Genzano di Roma RM 5 23970 176419
Frascati RM 6 22087 198506
Monte Porzio Catone RM 8 8693 207199
Ciampino RM 8 38412 245611
Lanuvio RM 8 13632 259243
Monte Compatri RM 8 11978 271221
Rocca Priora RM 9 11962 283183
Colonna RM 11 4287 287470
Velletri RM 11 53303 340773
San Cesareo RM 13 15153 355926
Lariano RM 14 13432 369358
Zagarolo RM 16 17843 387201
Pomezia RM 17 62966 450167
Aprilia LT 18 73446 523613
Gallicano nel Lazio RM 18 6334 529947
Labico RM 18 6379 536326
Ardea RM 19 49183 585509

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km NW of Velletri (53303 inhabitants)
17 Km NE of Pomezia (62966 inhabitants)
18 Km N of Aprilia (73446 inhabitants)
22 Km SE of Roma (2864731 inhabitants)
26 Km SW of Tivoli (56533 inhabitants)
28 Km S of Guidonia Montecelio (88673 inhabitants)
34 Km N of Anzio (54211 inhabitants)
36 Km E of Fiumicino (78395 inhabitants)
37 Km NW of Latina (125985 inhabitants)
82 Km E of Civitavecchia (52991 inhabitants)
88 Km SE of Viterbo (67173 inhabitants)
90 Km SW of L'Aquila (69753 inhabitants)
90 Km S of Terni (111501 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
Rev 1000 Md 2.0
ML-VAX 1.6
1989-11-21
05:21:43
41.75 12.67 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 104789
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-11-21 05:21:43 ± 0.265
Latitude 41.75 ± 0.01
Longitude 12.67 ± 0.02
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 104789

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) 2007.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 282
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) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00024
Epicentral distance of station farthest from the epicenter (degree) 0.00567
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

Field Value
Value 2
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 104789
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:37:36

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 104789
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 Takeoff_angle Residual Weight
--.MNS.Z. 1989-11-21T05:22:06.46 10.0 undecidable manual SG 0 0.0057 0.4 0
--.MNS.Z. 1989-11-21T05:21:56.39 10.0 undecidable manual PG 0 0.0057 -0.27 0.3
--.CP9.Z. 1989-11-21T05:21:53.90 10.0 undecidable manual SG 62 0.0021 -0.22 0.3
--.CP9.Z. 1989-11-21T05:21:49.45 10.0 undecidable manual PG 62 0.0021 0.15 1.2
--.RDP.Z. 1989-11-21T05:21:47.50 10.0 undecidable manual SG 78 0.0002 -0.04 0.7
--.RMP.Z. 1989-11-21T05:21:47.99 10.0 undecidable manual SG 20 0.0006 -0.08 0.6
--.RMP.Z. 1989-11-21T05:21:46.30 10.0 undecidable manual PG 20 0.0006 0.02 1.7
--.RDP.Z. 1989-11-21T05:21:46.00 10.0 positive manual PG 78 0.0002 0.03 3.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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