Earthquake with magnitude of Md 2.0 on date 21-11-1989 and time 05:25:41 (UTC) in region 1 km E Grottaferrata (RM)

A magnitude Md 2.0 earthquake occured in region: 1 km E Grottaferrata (RM), on

  • 21-11-1989 05:25:41 (UTC)
  • 21-11-1989 06:25:41 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.79, 12.68 at 9 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
Grottaferrata RM 1 20327 20327
Frascati RM 2 22087 42414
Marino RM 3 43026 85440
Rocca di Papa RM 4 17034 102474
Monte Porzio Catone RM 5 8693 111167
Castel Gandolfo RM 5 8997 120164
Monte Compatri RM 6 11978 132142
Ciampino RM 6 38412 170554
Albano Laziale RM 7 41715 212269
Rocca Priora RM 7 11962 224231
Ariccia RM 8 19407 243638
Colonna RM 8 4287 247925
Nemi RM 8 1943 249868
Genzano di Roma RM 9 23970 273838
San Cesareo RM 11 15153 288991
Lanuvio RM 12 13632 302623
Zagarolo RM 14 17843 320466
Velletri RM 14 53303 373769
Lariano RM 15 13432 387201
Gallicano nel Lazio RM 15 6334 393535
Labico RM 17 6379 399914
Palestrina RM 19 21672 421586
Castel San Pietro Romano RM 19 902 422488
Pomezia RM 20 62966 485454
Roma RM 20 2864731 3350185

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km NW of Velletri (53303 inhabitants)
20 Km NE of Pomezia (62966 inhabitants)
20 Km SE of Roma (2864731 inhabitants)
22 Km N of Aprilia (73446 inhabitants)
22 Km SW of Tivoli (56533 inhabitants)
24 Km S of Guidonia Montecelio (88673 inhabitants)
37 Km E of Fiumicino (78395 inhabitants)
38 Km N of Anzio (54211 inhabitants)
40 Km NW of Latina (125985 inhabitants)
81 Km E of Civitavecchia (52991 inhabitants)
84 Km SE of Viterbo (67173 inhabitants)
86 Km S of Terni (111501 inhabitants)
87 Km SW of L'Aquila (69753 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
05:25:41
41.79 12.68 9 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 104799
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-11-21 05:25:41 ± 0.12
Latitude 41.79 ± 0.01
Longitude 12.68 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 104799

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) 1218
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 223
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) 0.00534
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 104799
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:37:37

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 104799
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. 1989-11-21T05:26:02.48 10.0 undecidable manual SG 0 0.0053 0.06 0.4
--.MNS.Z. 1989-11-21T05:25:53.43 10.0 undecidable manual PG 0 0.0053 -0.03 1
--.CP9.Z. 1989-11-21T05:25:50.14 10.0 undecidable manual SG 70 0.0019 -0.04 0.7
--.CP9.Z. 1989-11-21T05:25:46.42 10.0 undecidable manual PG 70 0.0019 0.02 1.9
--.RDP.Z. 1989-11-21T05:25:45.00 10.0 undecidable manual SG 136 0.0003 0.2 0.3
--.RMP.Z. 1989-11-21T05:25:44.34 10.0 undecidable manual SG 39 0.0002 -0.26 0.1
--.RDP.Z. 1989-11-21T05:25:43.20 10.0 positive manual PG 136 0.0003 -0.09 2.9
--.RMP.Z. 1989-11-21T05:25:43.34 10.0 undecidable manual PG 39 0.0002 0.17 0.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download