Earthquake with magnitude of Md 3.9 on date 16-08-1985 and time 21:39:36 (Italy) in region 9 km E Ferriere (PC)

A magnitude Md 3.9 earthquake occured in region: 9 km E Ferriere (PC), on

  • 16-08-1985 19:39:36 (UTC)
  • 16-08-1985 21:39:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.62, 9.6 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
Ferriere PC 9 1294 1294
Bardi PR 11 2227 3521
Farini PC 11 1290 4811
Bedonia PR 13 3482 8293
Morfasso PC 14 1024 9317
Santo Stefano d'Aveto GE 14 1126 10443
Compiano PR 14 1112 11555
Tornolo PR 15 1010 12565
Bettola PC 18 2828 15393
Bore PR 19 749 16142
Borgo Val di Taro PR 20 6999 23141
Rezzoaglio GE 20 995 24136

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km S of Piacenza (102191 inhabitants)
58 Km E of Genova (586655 inhabitants)
60 Km NW of La Spezia (93959 inhabitants)
61 Km W of Parma (192836 inhabitants)
66 Km SW of Cremona (71901 inhabitants)
72 Km SE of Pavia (72576 inhabitants)
72 Km NW of Carrara (63133 inhabitants)
78 Km NW of Massa (69479 inhabitants)
82 Km W of Reggio nell'Emilia (171345 inhabitants)
84 Km E of Alessandria (93943 inhabitants)
95 Km E of Savona (61345 inhabitants)
97 Km SE of Vigevano (63310 inhabitants)
98 Km NW of Viareggio (62467 inhabitants)
100 Km SE 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 3.9 1985-08-16
19:39:36
44.62 9.6 9 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 11899
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-16 19:39:36 ± 0.435
Latitude 44.62 ± 0.02
Longitude 9.60 ± 0.02
Depth (km) 9 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 11899

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) 2767.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00162
Epicentral distance of station farthest from the epicenter (degree) 0.02987
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 21
Magnitude information

Md:3.9

Field Value
Value 3.9
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 11899
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:15:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RBL.Z. 1985-08-16T19:40:29.00 10.0 undecidable manual PN 55 0.0299 0.86 0.6
--.STV.Z. 1985-08-16T19:40:27.50 10.0 undecidable manual SN 257 0.0149 0.92 0.5
--.PO9.Z. 1985-08-16T19:40:27.00 10.0 undecidable manual PN 128 0.0285 0.98 0.6
--.TRI.Z. 1985-08-16T19:40:24.00 10.0 undecidable manual PN 68 0.0281 -1.51 0.2
--.CM2.Z. 1985-08-16T19:40:24.70 10.0 undecidable manual PN 117 0.0262 2.05 0.1
--.FO1.Z. 1985-08-16T19:40:23.50 10.0 undecidable manual PN 47 0.0267 0.13 0.9
--.AS1.Z. 1985-08-16T19:40:20.50 10.0 undecidable manual PN 124 0.0242 0.96 0.6
--.AR1.Z. 1985-08-16T19:40:20.60 10.0 undecidable manual PN 113 0.0238 1.7 0.2
--.ROB.Z. 1985-08-16T19:40:16.50 10.0 undecidable manual SN 256 0.0114 -0.82 0.5
--.SAL.Z. 1985-08-16T19:40:15.00 10.0 undecidable manual SN 32 0.0106 -0.22 0.7
--.PS9.Z. 1985-08-16T19:40:12.00 10.0 undecidable manual SN 143 0.01 -1.57 0.1
--.CK1.Z. 1985-08-16T19:40:10.00 10.0 undecidable manual SG 258 0.0087 0.65 0.6
--.CTI.Z. 1985-08-16T19:40:09.50 10.0 undecidable manual PN 44 0.0182 -0.89 0.6
--.DA9.Z. 1985-08-16T19:40:07.00 10.0 negative manual PN 266 0.0151 1.37 0.9
--.STV.Z. 1985-08-16T19:40:05.30 10.0 undecidable manual PN 257 0.0149 -0.07 2.5
--.ORO.Z. 1985-08-16T19:40:04.50 10.0 undecidable manual PN 311 0.0137 1.03 0.7
--.FIR.Z. 1985-08-16T19:40:03.00 10.0 undecidable manual PN 124 0.013 0.47 1.2
--.VAI.Z. 1985-08-16T19:40:02.00 10.0 negative manual PN 335 0.0124 0.54 2.2
--.ROB.Z. 1985-08-16T19:39:59.20 10.0 negative manual PN 256 0.0114 -0.82 1.5
--.SAL.Z. 1985-08-16T19:39:58.50 10.0 negative manual PN 32 0.0106 -0.31 2.4
--.PS9.Z. 1985-08-16T19:39:57.00 10.0 undecidable manual PN 143 0.01 -0.86 0.7
--.CK1.Z. 1985-08-16T19:39:55.50 10.0 undecidable manual PG 258 0.0087 0.08 1.3
--.GEN.Z. 1985-08-16T19:39:54.30 10.0 undecidable manual SG 247 0.0045 -0.59 0.6
--.BD1.Z. 1985-08-16T19:39:53.50 10.0 undecidable manual PG 127 0.0081 -0.82 0.7
--.GEN.Z. 1985-08-16T19:39:46.40 10.0 negative manual PG 247 0.0045 -0.67 1.8
--.PCN.Z. 1985-08-16T19:39:45.00 10.0 undecidable manual PG 6 0.0039 -0.61 2
--.CO9.Z. 1985-08-16T19:39:41.00 10.0 negative manual PG 323 0.0016 0.13 2.5
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