Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.2 on date 21-06-1989 and time 01:24:44 (Italy) in region 1 km NW Marcellina (RM)

A magnitude Md 2.2 earthquake occured in region: 1 km NW Marcellina (RM), on

  • 20-06-1989 23:24:44 (UTC)
  • 21-06-1989 01:24:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.0280, 12.8040 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.

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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
Marcellina RM 1 7280 7280
San Polo dei Cavalieri RM 4 2992 10272
Palombara Sabina RM 5 13269 23541
Guidonia Montecelio RM 7 88673 112214
Tivoli RM 7 56533 168747
Vicovaro RM 7 4019 172766
Sant'Angelo Romano RM 8 5018 177784
Castel Madama RM 8 7399 185183
Roccagiovine RM 8 263 185446
Monteflavio RM 10 1348 186794
Licenza RM 10 1011 187805
Mandela RM 10 917 188722
Moricone RM 10 2650 191372
Percile RM 12 255 191627
Sambuci RM 12 925 192552
Montorio Romano RM 12 1984 194536
Saracinesco RM 13 185 194721
Montelibretti RM 13 5323 200044
San Gregorio da Sassola RM 13 1619 201663
Cineto Romano RM 14 601 202264
Ciciliano RM 14 1336 203600
Mentana RM 14 22921 226521
Casape RM 15 744 227265
Nerola RM 15 1926 229191
Fonte Nuova RM 16 32562 261753
Anticoli Corrado RM 16 915 262668
Scandriglia RI 16 3108 265776
Monterotondo RM 16 40830 306606
Roviano RM 16 1351 307957
Orvinio RI 16 405 308362
Riofreddo RM 17 781 309143
Vallinfreda RM 17 283 309426
Poli RM 17 2418 311844
Cerreto Laziale RM 17 1118 312962
Gallicano nel Lazio RM 18 6334 319296
Arsoli RM 18 1586 320882
Marano Equo RM 18 779 321661
Pisoniano RM 19 770 322431
Vivaro Romano RM 19 182 322613
Gerano RM 19 1263 323876
Agosta RM 20 1765 325641
Oricola AQ 20 1244 326885
Rocca Canterano RM 20 196 327081
Pozzaglia Sabina RI 20 360 327441

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km E of Guidonia Montecelio (88673 inhabitants)
7 Km N of Tivoli (56533 inhabitants)
30 Km NE of Roma (2864731 inhabitants)
38 Km N of Velletri (53303 inhabitants)
47 Km NE of Pomezia (62966 inhabitants)
50 Km N of Aprilia (73446 inhabitants)
55 Km NE of Fiumicino (78395 inhabitants)
61 Km S of Terni (111501 inhabitants)
61 Km SW of L'Aquila (69753 inhabitants)
63 Km N of Latina (125985 inhabitants)
66 Km N of Anzio (54211 inhabitants)
72 Km SE of Viterbo (67173 inhabitants)
84 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 1989-06-20
23:24:44		 42.028 12.804 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 93639
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-06-20 23:24:44 ± 0.139
Latitude 42.0280 ± 0.0075
Longitude 12.8040 ± 0.0177
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 93639

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) 1682.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 146
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
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) 0.00202
Epicentral distance of station farthest from the epicenter (degree) 0.00729
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 93639
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:27:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.SDI.Z. 1989-06-20T23:25:13.12 10.0 undecidable manual SG 112 0.8103 0.64 0.1
--.AZI.Z. 1989-06-20T23:25:02.00 10.0 undecidable manual SG 94 0.4662 0.53 0.1
--.SDI.Z. 1989-06-20T23:25:00.10 10.0 undecidable manual PG 112 0.8103 -0.52 0.3
--.MNS.Z. 1989-06-20T23:24:58.00 10.0 undecidable manual SG 345 0.3552 -0.18 0.5
--.AZI.Z. 1989-06-20T23:24:54.00 10.0 undecidable manual PG 94 0.4662 -0.27 1.1
--.RDP.Z. 1989-06-20T23:24:54.61 10.0 undecidable manual SG 193 0.2664 -0.63 0.1
--.RMP.Z. 1989-06-20T23:24:53.60 10.0 undecidable manual SG 199 0.222 -0.11 0.6
--.MNS.Z. 1989-06-20T23:24:52.50 10.0 undecidable manual PG 345 0.3552 0.13 1.5
--.RDP.Z. 1989-06-20T23:24:50.77 10.0 positive manual PG 193 0.2664 0.1 3
--.RMP.Z. 1989-06-20T23:24:49.96 10.0 negative manual PG 199 0.222 0.17 2.7
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