Earthquake with magnitude of Md 2.3 on date 30-05-1985 and time 19:46:30 (UTC) in region 2 km S Montasola (RI)

A magnitude Md 2.3 earthquake occured in region: 2 km S Montasola (RI), on

  • 30-05-1985 19:46:30 (UTC)
  • 30-05-1985 21:46:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.368, 12.684 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
Montasola RI 2 395 395
Casperia RI 3 1246 1641
Torri in Sabina RI 4 1256 2897
Cottanello RI 4 563 3460
Vacone RI 4 256 3716
Roccantica RI 5 563 4279
Montebuono RI 7 883 5162
Configni RI 7 633 5795
Cantalupo in Sabina RI 7 1685 7480
Selci RI 7 1106 8586
Tarano RI 7 1444 10030
Poggio Catino RI 8 1341 11371
Contigliano RI 8 3783 15154
Monte San Giovanni in Sabina RI 9 714 15868
Calvi dell'Umbria TR 10 1856 17724
Forano RI 11 3179 20903
Collevecchio RI 11 1577 22480
Poggio Mirteto RI 11 6315 28795
Greccio RI 12 1558 30353
Stimigliano RI 12 2328 32681
Salisano RI 13 567 33248
Montopoli di Sabina RI 14 4210 37458
Filacciano RM 14 477 37935
Montenero Sabino RI 14 299 38234
Mompeo RI 14 530 38764
Stroncone TR 15 4917 43681
Ponzano Romano RM 15 1155 44836
Rieti RI 15 47698 92534
Torrita Tiberina RM 16 1089 93623
Castelnuovo di Farfa RI 16 1059 94682
Casaprota RI 16 744 95426
Magliano Sabina RI 17 3774 99200
Colli sul Velino RI 17 533 99733
Nazzano RM 17 1436 101169
Otricoli TR 18 1869 103038
Fara in Sabina RI 18 13742 116780
Belmonte in Sabina RI 18 636 117416
Toffia RI 18 1058 118474
Frasso Sabino RI 18 743 119217
Poggio San Lorenzo RI 18 589 119806
Poggio Nativo RI 19 2622 122428
Torricella in Sabina RI 19 1342 123770
Sant'Oreste RM 20 3687 127457

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km S of Terni (111501 inhabitants)
41 Km N of Guidonia Montecelio (88673 inhabitants)
46 Km N of Tivoli (56533 inhabitants)
48 Km E of Viterbo (67173 inhabitants)
55 Km NE of Roma (2864731 inhabitants)
59 Km W of L'Aquila (69753 inhabitants)
66 Km S of Foligno (57155 inhabitants)
76 Km NE of Fiumicino (78395 inhabitants)
76 Km N of Velletri (53303 inhabitants)
79 Km N of Pomezia (62966 inhabitants)
79 Km E of Civitavecchia (52991 inhabitants)
86 Km S of Perugia (166134 inhabitants)
86 Km N of Aprilia (73446 inhabitants)
90 Km W of Teramo (54892 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 1985-05-30
19:46:30
42.368 12.684 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 7649
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-05-30 19:46:30 ± 0.322
Latitude 42.3680 ± 0.0159
Longitude 12.6840 ± 0.0138
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 7649

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) 2098
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 315
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
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) 0.00251
Epicentral distance of station farthest from the epicenter (degree) 0.01028
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 7649
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:11:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AS1.Z. 1985-05-30T19:46:54.00 10.0 undecidable manual SG 358 0.0062 -0.21 0.4
--.AR1.Z. 1985-05-30T19:46:52.00 10.0 undecidable manual PN? 9 0.0103 0.22 0.3
--.AS1.Z. 1985-05-30T19:46:44.00 10.0 undecidable manual PG 358 0.0062 0.02 2.4
--.PO9.Z. 1985-05-30T19:46:41.10 10.0 undecidable manual SG 42 0.0025 0.18 0.6
--.PO9.Z. 1985-05-30T19:46:36.10 10.0 undecidable manual PG 42 0.0025 -0.2 1.2
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