Earthquake with magnitude of Md 2.8 on date 20-07-1985 and time 03:50:12 (Italy) in region 8 km N Bedonia (PR)

A magnitude Md 2.8 earthquake occured in region: 8 km N Bedonia (PR), on

  • 20-07-1985 01:50:12 (UTC)
  • 20-07-1985 03:50:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.58, 9.61 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
Bedonia PR 9 3482 3482
Compiano PR 10 1112 4594
Tornolo PR 10 1010 5604
Bardi PR 11 2227 7831
Ferriere PC 12 1294 9125
Santo Stefano d'Aveto GE 13 1126 10251
Farini PC 15 1290 11541
Borgo Val di Taro PR 16 6999 18540
Albareto PR 16 2156 20696
Morfasso PC 18 1024 21720
Rezzoaglio GE 19 995 22715

Municipalities with at least 50000 inhabitants

An earthquake occurred to
53 Km S of Piacenza (102191 inhabitants)
55 Km NW of La Spezia (93959 inhabitants)
57 Km E of Genova (586655 inhabitants)
62 Km W of Parma (192836 inhabitants)
68 Km NW of Carrara (63133 inhabitants)
70 Km SW of Cremona (71901 inhabitants)
74 Km NW of Massa (69479 inhabitants)
76 Km SE of Pavia (72576 inhabitants)
82 Km W of Reggio nell'Emilia (171345 inhabitants)
87 Km E of Alessandria (93943 inhabitants)
94 Km NW of Viareggio (62467 inhabitants)
95 Km E of Savona (61345 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 2.8 1985-07-20
01:50:12
44.58 9.61 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 10419
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-07-20 01:50:12 ± 0.234
Latitude 44.58 ± 0.02
Longitude 9.61 ± 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 10419

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) 2767
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 109
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.9
Epicentral distance of station closest to the epicenter (degree) 0.00154
Epicentral distance of station farthest from the epicenter (degree) 0.01846
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

Md:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 10419
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CTI.Z. 1985-07-20T01:51:12.00 10.0 undecidable manual SN 43 0.0185 0.6 0.4
--.SAL.Z. 1985-07-20T01:50:53.00 10.0 undecidable manual SN 31 0.0109 1.52 0.2
--.BG1.Z. 1985-07-20T01:50:51.00 10.0 undecidable manual SN 3 0.0108 -0.15 0.7
--.PS9.Z. 1985-07-20T01:50:48.00 10.0 undecidable manual SN 142 0.0096 -0.25 0.7
--.CTI.Z. 1985-07-20T01:50:48.00 10.0 undecidable manual PN 43 0.0185 1.65 0.4
--.BD1.Z. 1985-07-20T01:50:42.50 10.0 undecidable manual SG 125 0.0079 0.42 0.7
--.VAI.Z. 1985-07-20T01:50:38.00 10.0 undecidable manual PN 335 0.0127 0.37 1.4
--.ROB.Z. 1985-07-20T01:50:36.10 10.0 undecidable manual PN 258 0.0114 0.47 1.5
--.SAL.Z. 1985-07-20T01:50:35.00 10.0 undecidable manual PN 31 0.0109 0.15 1.6
--.BG1.Z. 1985-07-20T01:50:34.00 10.0 undecidable manual PN 3 0.0108 -0.66 1.4
--.PS9.Z. 1985-07-20T01:50:32.00 10.0 undecidable manual PN 142 0.0096 -0.98 1.1
--.GEN.Z. 1985-07-20T01:50:30.90 10.0 undecidable manual SG 251 0.0045 0.64 0.6
--.BD1.Z. 1985-07-20T01:50:30.50 10.0 undecidable manual PG 125 0.0079 1.08 1
--.GEN.Z. 1985-07-20T01:50:22.20 10.0 undecidable manual PG 251 0.0045 -0.4 1.7
--.PCN.Z. 1985-07-20T01:50:20.50 10.0 undecidable manual PG 4 0.0042 -1.5 1.3
--.BVT.Z. 1985-07-20T01:50:15.10 10.0 undecidable manual PG 125 0.0015 -1.46 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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