Earthquake with magnitude of Md 3.7 on date 18-08-1985 and time 15:10:16 (Italy) in region 4 km NE Compiano (PR)

A magnitude Md 3.7 earthquake occured in region: 4 km NE Compiano (PR), on

  • 18-08-1985 13:10:16 (UTC)
  • 18-08-1985 15:10:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.53, 9.69 at 9 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
Compiano PR 4 1112 1112
Bedonia PR 5 3482 4594
Tornolo PR 7 1010 5604
Borgo Val di Taro PR 8 6999 12603
Albareto PR 9 2156 14759
Bardi PR 12 2227 16986
Valmozzola PR 16 539 17525
Varese Ligure SP 18 2059 19584
Santo Stefano d'Aveto GE 19 1126 20710
Varsi PR 20 1230 21940
Ferriere PC 20 1294 23234

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km N of La Spezia (93959 inhabitants)
58 Km S of Piacenza (102191 inhabitants)
59 Km SW of Parma (192836 inhabitants)
60 Km NW of Carrara (63133 inhabitants)
61 Km E of Genova (586655 inhabitants)
66 Km NW of Massa (69479 inhabitants)
72 Km SW of Cremona (71901 inhabitants)
77 Km W of Reggio nell'Emilia (171345 inhabitants)
84 Km SE of Pavia (72576 inhabitants)
86 Km NW of Viareggio (62467 inhabitants)
95 Km E of Alessandria (93943 inhabitants)
99 Km E of Savona (61345 inhabitants)
99 Km W of Carpi (70699 inhabitants)
99 Km W of Modena (184973 inhabitants)
100 Km NW of Lucca (89046 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 3.7 1985-08-18
13:10:16
44.53 9.69 9 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 12039
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-18 13:10:16 ± 0.261
Latitude 44.53 ± 0.02
Longitude 9.69 ± 0.02
Depth (km) 9 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 12039

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) 2046.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00089
Epicentral distance of station farthest from the epicenter (degree) 0.02987
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitude information

Md:3.7

Field Value
Value 3.7
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 12039
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:15:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RBL.Z. 1985-08-18T13:11:07.50 10.0 undecidable manual PN 53 0.0299 -0.68 0.5
--.TRI.Z. 1985-08-18T13:11:05.00 10.0 undecidable manual PN 66 0.0279 -0.22 0.8
--.FO1.Z. 1985-08-18T13:11:04.40 10.0 undecidable manual PN 45 0.0269 0.78 0.4
--.VAI.Z. 1985-08-18T13:11:03.00 10.0 undecidable manual SN 334 0.0134 0.55 0.4
--.ROB.Z. 1985-08-18T13:10:57.60 10.0 undecidable manual SN 260 0.0118 -0.81 0.4
--.CAE.Z. 1985-08-18T13:10:57.40 10.0 undecidable manual PN 51 0.0219 1.43 0.1
--.CTI.Z. 1985-08-18T13:10:50.80 10.0 undecidable manual PN 41 0.0185 0.07 1
--.PS9.Z. 1985-08-18T13:10:50.50 10.0 undecidable manual SG 143 0.009 -0.26 0.5
--.DA9.Z. 1985-08-18T13:10:47.50 10.0 positive manual PN 270 0.0156 1.04 0.7
--.STV.Z. 1985-08-18T13:10:46.20 10.0 undecidable manual PN 261 0.0153 0.21 2.2
--.ORO.Z. 1985-08-18T13:10:46.10 10.0 undecidable manual PN 313 0.0147 1.16 0.3
--.BD1.Z. 1985-08-18T13:10:43.00 10.0 undecidable manual SG 125 0.0072 -1.17 0.1
--.VAI.Z. 1985-08-18T13:10:43.00 10.0 undecidable manual PN 334 0.0134 0.05 1.2
--.ROB.Z. 1985-08-18T13:10:40.20 10.0 undecidable manual PN 260 0.0118 -0.42 2.2
--.SAL.Z. 1985-08-18T13:10:39.50 10.0 positive manual PN 28 0.011 0.05 2.6
--.PS9.Z. 1985-08-18T13:10:36.50 10.0 undecidable manual PG 143 0.009 0.3 1.2
--.CK1.Z. 1985-08-18T13:10:36.00 10.0 undecidable manual PG 264 0.0091 -0.29 1.2
--.GEN.Z. 1985-08-18T13:10:35.50 10.0 undecidable manual SG 258 0.0049 -0.47 0.6
--.CA4.Z. 1985-08-18T13:10:33.70 10.0 undecidable manual PG 64 0.0079 -0.16 1.3
--.BD1.Z. 1985-08-18T13:10:32.00 10.0 undecidable manual PG 125 0.0072 -0.39 1.1
--.CO9.Z. 1985-08-18T13:10:29.00 10.0 undecidable manual SG 324 0.0026 1.14 0.1
--.GEN.Z. 1985-08-18T13:10:27.40 10.0 negative manual PG 258 0.0049 -0.26 2.4
--.PCN.Z. 1985-08-18T13:10:26.00 10.0 undecidable manual PG 358 0.0046 -1.21 0.5
--.CO9.Z. 1985-08-18T13:10:22.30 10.0 undecidable manual PG 324 0.0026 -0.68 0.8
--.BVT.Z. 1985-08-18T13:10:19.50 10.0 undecidable manual PG 121 0.0009 0.25 2.5
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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