Earthquake with magnitude of Md 2.2 on date 08-07-1985 and time 03:33:02 (Italy) in region 4 km W Visso (MC)

A magnitude Md 2.2 earthquake occured in region: 4 km W Visso (MC), on

  • 08-07-1985 01:33:02 (UTC)
  • 08-07-1985 03:33:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9410, 13.0400 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
Visso MC 4 1107 1107
Monte Cavallo MC 7 145 1252
Preci PG 7 724 1976
Ussita MC 8 444 2420
Castelsantangelo sul Nera MC 11 281 2701
Sellano PG 11 1079 3780
Fiordimonte MC 12 202 3982
Pieve Torina MC 12 1458 5440
Pievebovigliana MC 14 866 6306
Fiastra MC 14 559 6865
Acquacanina MC 15 121 6986
Muccia MC 16 915 7901
Serravalle di Chienti MC 16 1070 8971
Bolognola MC 16 142 9113
Cerreto di Spoleto PG 17 1075 10188
Norcia PG 17 4957 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Foligno (57155 inhabitants)
53 Km NE of Terni (111501 inhabitants)
56 Km E of Perugia (166134 inhabitants)
63 Km NW of Teramo (54892 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
96 Km NE of Viterbo (67173 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 1985-07-08
01:33:02
42.941 13.04 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 9799
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-07-08 01:33:02 ± 0.198
Latitude 42.9410 ± 0.0090
Longitude 13.0400 ± 0.0175
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 9799

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) 1742.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 174
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00235
Epicentral distance of station farthest from the epicenter (degree) 0.00502
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:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 9799
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:13:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.AR1.Z. 1985-07-08T01:33:22.50 10.0 undecidable manual SG 352 0.555 0.14 0.7
--.PO9.Z. 1985-07-08T01:33:17.00 10.0 undecidable manual SG 191 0.3663 0.68 0.2
--.AS1.Z. 1985-07-08T01:33:14.00 10.0 undecidable manual SG 293 0.3108 -0.23 0.8
--.CM2.Z. 1985-07-08T01:33:13.20 10.0 undecidable manual SG 16 0.2553 0.46 0.7
--.AR1.Z. 1985-07-08T01:33:13.50 10.0 undecidable manual PG 352 0.555 -0.43 1
--.PO9.Z. 1985-07-08T01:33:10.00 10.0 undecidable manual PG 191 0.3663 -0.44 1.2
--.AS1.Z. 1985-07-08T01:33:09.50 10.0 undecidable manual PG 293 0.3108 0.26 1.8
--.CM2.Z. 1985-07-08T01:33:08.10 10.0 undecidable manual PG 16 0.2553 -0.28 1.7
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