Earthquake with magnitude of Md 2.4 on date 02-05-1985 and time 09:27:50 (Italy) in region 3 km E Graffignano (VT)

A magnitude Md 2.4 earthquake occured in region: 3 km E Graffignano (VT), on

  • 02-05-1985 07:27:50 (UTC)
  • 02-05-1985 09:27:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.57, 12.24 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
Graffignano VT 3 2292 2292
Alviano TR 5 1463 3755
Civitella d'Agliano VT 6 1640 5395
Attigliano TR 8 2028 7423
Guardea TR 8 1836 9259
Lugnano in Teverina TR 8 1494 10753
Castiglione in Teverina VT 9 2329 13082
Bomarzo VT 9 1805 14887
Celleno VT 9 1355 16242
Giove TR 10 1928 18170
Montecchio TR 11 1676 19846
Baschi TR 11 2722 22568
Vitorchiano VT 12 5233 27801
Bagnoregio VT 13 3650 31451
Lubriano VT 13 909 32360
Penna in Teverina TR 13 1099 33459
Bassano in Teverina VT 13 1313 34772
Amelia TR 14 11897 46669
Soriano nel Cimino VT 17 8403 55072
Porano TR 17 1966 57038
Orte VT 17 8923 65961
Montefiascone VT 17 13432 79393
Avigliano Umbro TR 18 2558 81951
Vasanello VT 19 4068 86019
Orvieto TR 20 20630 106649

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NE of Viterbo (67173 inhabitants)
34 Km W of Terni (111501 inhabitants)
57 Km SW of Foligno (57155 inhabitants)
61 Km S of Perugia (166134 inhabitants)
64 Km NE of Civitavecchia (52991 inhabitants)
75 Km NW of Guidonia Montecelio (88673 inhabitants)
78 Km N of Roma (2864731 inhabitants)
82 Km NW of Tivoli (56533 inhabitants)
89 Km N of Fiumicino (78395 inhabitants)
94 Km E of Grosseto (82087 inhabitants)
98 Km W 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 2.4 1985-05-02
07:27:50
42.57 12.24 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 5739
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-05-02 07:27:50 ± 0.724
Latitude 42.57 ± 0.04
Longitude 12.24 ± 0.05
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 5739

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) 6213.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 229
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00332
Epicentral distance of station farthest from the epicenter (degree) 0.00963
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 5739
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:10:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CH1.Z. 1985-05-02T07:28:10.50 10.0 undecidable manual PN 349 0.0096 -0.59 0.9
--.PO9.Z. 1985-05-02T07:28:08.50 10.0 undecidable manual SG 89 0.0046 -0.31 1.1
--.MNS.Z. 1985-05-02T07:28:05.00 10.0 undecidable manual SG 119 0.0033 0.75 0.5
--.AS1.Z. 1985-05-02T07:28:03.50 10.0 undecidable manual PG 31 0.0052 1.44 0.7
--.PO9.Z. 1985-05-02T07:28:00.00 10.0 undecidable manual PG 89 0.0046 -0.97 0.9
--.MNS.Z. 1985-05-02T07:27:58.50 10.0 undecidable manual PG 119 0.0033 0.17 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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