Earthquake with magnitude of Md 2.1 on date 12-02-1985 and time 09:05:00 (UTC) in region 7 km E Pietralunga (PG)

A magnitude Md 2.1 earthquake occured in region: 7 km E Pietralunga (PG), on

  • 12-02-1985 09:05:00 (UTC)
  • 12-02-1985 10:05:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.46, 12.52 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
Cantiano PU 9 2245 4356
Gubbio PG 13 32216 36572
Apecchio PU 13 1882 38454
Scheggia e Pascelupo PG 14 1393 39847
Cagli PU 14 8731 48578
Piobbico PU 14 2029 50607
Frontone PU 18 1300 51907
Costacciaro PG 19 1216 53123
Montone PG 19 1680 54803

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km N of Perugia (166134 inhabitants)
52 Km E of Arezzo (99543 inhabitants)
58 Km SW of Fano (60888 inhabitants)
58 Km N of Foligno (57155 inhabitants)
59 Km SW of Pesaro (94582 inhabitants)
67 Km S of Rimini (147750 inhabitants)
78 Km SE of Cesena (96758 inhabitants)
82 Km W of Ancona (100861 inhabitants)
93 Km SE of Forlì (117913 inhabitants)
98 Km E of Siena (53903 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 2.1 1985-02-12
09:05:00
43.47 12.52 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 1539
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-12 09:05:00 ± 0.315
Latitude 43.47 ± 0.01
Longitude 12.52 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1539

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) 1895
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 276
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) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00275
Epicentral distance of station farthest from the epicenter (degree) 0.00469
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:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 1539
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:06:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CM8.Z. 1985-02-12T09:05:19.60 10.0 undecidable manual SG 120 0.0047 -0.1 1
--.AS1.Z. 1985-02-12T09:05:16.00 10.0 undecidable manual SG 167 0.0036 -0.08 0.7
--.AR1.Z. 1985-02-12T09:05:12.50 10.0 undecidable manual SG 83 0.0028 -0.13 0.7
--.CM8.Z. 1985-02-12T09:05:12.30 10.0 undecidable manual PG 120 0.0047 0.55 0.3
--.AS1.Z. 1985-02-12T09:05:09.50 10.0 undecidable manual PG 167 0.0036 -0.16 1.6
--.AR1.Z. 1985-02-12T09:05:07.50 10.0 undecidable manual PG 83 0.0028 -0.17 1.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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