ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Md 2.2 on date 07-02-1985 and time 11:06:13 (Italy) in region 7 km SE Pietralunga (PG)

A magnitude Md 2.2 earthquake occured in region: 7 km SE Pietralunga (PG), on

  • 07-02-1985 10:06:13 (UTC)
  • 07-02-1985 11:06:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.39, 12.49 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
Pietralunga PG 7 2111 2111
Gubbio PG 8 32216 34327
Montone PG 14 1680 36007
Scheggia e Pascelupo PG 14 1393 37400
Cantiano PU 14 2245 39645
Umbertide PG 16 16681 56326
Costacciaro PG 18 1216 57542
Apecchio PU 20 1882 59424

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km N of Perugia (166134 inhabitants)
50 Km E of Arezzo (99543 inhabitants)
51 Km NW of Foligno (57155 inhabitants)
66 Km SW of Fano (60888 inhabitants)
67 Km SW of Pesaro (94582 inhabitants)
75 Km S of Rimini (147750 inhabitants)
85 Km S of Cesena (96758 inhabitants)
87 Km W of Ancona (100861 inhabitants)
93 Km N of Terni (111501 inhabitants)
94 Km E of Siena (53903 inhabitants)
99 Km SE of Forlì (117913 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 2.2 1985-02-07
10:06:13
43.39 12.49 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 1239
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-07 10:06:13 ± 0.071
Latitude 43.39 ± 0.00
Longitude 12.49 ± 0.01
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1239

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) 780.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 140
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
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) 0.00308
Epicentral distance of station farthest from the epicenter (degree) 0.00785
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 1239
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:06:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.PO9.Z. 1985-02-07T10:06:31.00 10.0 undecidable manual PG 158 0.0079 -0.2 0.7
--.CH1.Z. 1985-02-07T10:06:30.50 10.0 undecidable manual SG 301 0.0041 0 0.8
--.AS1.Z. 1985-02-07T10:06:27.00 10.0 undecidable manual SG 160 0.0031 0.11 1
--.AR1.Z. 1985-02-07T10:06:27.00 10.0 undecidable manual SG 71 0.0031 0.29 0.3
--.CH1.Z. 1985-02-07T10:06:23.50 10.0 undecidable manual PG 301 0.0041 0.06 1.9
--.AR1.Z. 1985-02-07T10:06:21.00 10.0 undecidable manual PG 71 0.0031 -0.25 0.8
--.AS1.Z. 1985-02-07T10:06:21.50 10.0 undecidable manual PG 160 0.0031 0.14 1.5
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