ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Md 2.3 on date 12-08-1985 and time 03:26:06 (Italy) in region 1 km NE Ferriere (PC)

A magnitude Md 2.3 earthquake occured in region: 1 km NE Ferriere (PC), on

  • 12-08-1985 01:26:06 (UTC)
  • 12-08-1985 03:26:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.65, 9.51 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
Ferriere PC 1 1294 1294
Farini PC 9 1290 2584
Santo Stefano d'Aveto GE 12 1126 3710
Corte Brugnatella PC 12 586 4296
Cerignale PC 13 127 4423
Coli PC 13 879 5302
Ottone PC 14 516 5818
Bettola PC 16 2828 8646
Bobbio PC 16 3577 12223
Rezzoaglio GE 17 995 13218
Morfasso PC 17 1024 14242
Zerba PC 18 77 14319
Bardi PR 18 2227 16546
Gorreto GE 18 97 16643
Bedonia PR 19 3482 20125
Fontanigorda GE 20 277 20402
Rovegno GE 20 554 20956

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km SW of Piacenza (102191 inhabitants)
53 Km NE of Genova (586655 inhabitants)
66 Km NW of La Spezia (93959 inhabitants)
66 Km SE of Pavia (72576 inhabitants)
67 Km W of Parma (192836 inhabitants)
67 Km SW of Cremona (71901 inhabitants)
76 Km E of Alessandria (93943 inhabitants)
79 Km NW of Carrara (63133 inhabitants)
85 Km NW of Massa (69479 inhabitants)
89 Km W of Reggio nell'Emilia (171345 inhabitants)
90 Km E of Savona (61345 inhabitants)
90 Km SE of Vigevano (63310 inhabitants)
94 Km S of Milano (1345851 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 2.3 1985-08-12
01:26:06
44.65 9.51 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 11539
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-12 01:26:06 ± 0.35
Latitude 44.65 ± 0.02
Longitude 9.51 ± 0.01
Depth (km) 10 ± 12 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 11539

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) 2854.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
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) 0.00105
Epicentral distance of station farthest from the epicenter (degree) 0.00413
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 1
Type of magnitude Md
Reference to an origin 11539
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.GEN.Z. 1985-08-12T01:26:23.00 10.0 undecidable manual SG 240 0.0041 -0.28 0.2
--.BVT.Z. 1985-08-12T01:26:17.30 10.0 undecidable manual SG 128 0.0025 0.01 0.9
--.GEN.Z. 1985-08-12T01:26:16.20 10.0 undecidable manual PG 240 0.0041 0.07 1.7
--.BVT.Z. 1985-08-12T01:26:12.50 10.0 undecidable manual PG 128 0.0025 -0.17 1.6
--.CO9.Z. 1985-08-12T01:26:12.00 10.0 undecidable manual SG 339 0.0011 -0.3 0.3
--.CO9.Z. 1985-08-12T01:26:10.00 10.0 undecidable manual PG 339 0.0011 0.21 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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