Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 3.4 on date 13-01-1985 and time 11:13:56 (Italy) in region 4 km SW Gubbio (PG)

A magnitude Md 3.4 earthquake occured in region: 4 km SW Gubbio (PG), on

  • 13-01-1985 10:13:56 (UTC)
  • 13-01-1985 11:13:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.32, 12.55 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Gubbio PG 4 32216 32216
Scheggia e Pascelupo PG 13 1393 33609
Costacciaro PG 14 1216 34825
Sigillo PG 15 2404 37229
Pietralunga PG 16 2111 39340
Fossato di Vico PG 17 2840 42180
Cantiano PU 18 2245 44425
Umbertide PG 18 16681 61106
Valfabbrica PG 19 3389 64495
Montone PG 19 1680 66175

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NE of Perugia (166134 inhabitants)
43 Km NW of Foligno (57155 inhabitants)
56 Km E of Arezzo (99543 inhabitants)
69 Km SW of Fano (60888 inhabitants)
72 Km SW of Pesaro (94582 inhabitants)
82 Km S of Rimini (147750 inhabitants)
85 Km W of Ancona (100861 inhabitants)
85 Km N of Terni (111501 inhabitants)
94 Km S of Cesena (96758 inhabitants)
99 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
Bulletin
Rev1000 		Md 3.4
ML-VAX 3.1 		1985-01-13
10:13:56		 43.32 12.55 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 449
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-01-13 10:13:56 ± 0.182
Latitude 43.32 ± 0.01
Longitude 12.55 ± 0.03
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 449

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) 2668.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00219
Epicentral distance of station farthest from the epicenter (degree) 0.04743
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

Md:3.4

Field Value
Value 3.4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 449
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:05:43

ML:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 449
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SLE.Z. 1985-01-13T10:15:15.60 10.0 undecidable manual PN 328 0.0474 1.11 0.4
--.CTI.Z. 1985-01-13T10:15:12.00 10.0 undecidable manual SN 346 0.0251 -1.07 0.2
--.ROB.Z. 1985-01-13T10:14:50.00 10.0 undecidable manual PN 287 0.0316 -0.37 1.1
--.CKI.Z. 1985-01-13T10:14:48.00 10.0 undecidable manual PN 290 0.0294 1 0.6
--.FO1.Z. 1985-01-13T10:14:48.00 10.0 undecidable manual PN 2 0.0294 0.94 0.7
--.RBL.Z. 1985-01-13T10:14:46.00 10.0 undecidable manual PN 12 0.0287 -0.04 1.3
--.CEY.Z. 1985-01-13T10:14:41.70 10.0 undecidable manual PN 28 0.0248 1.68 0.2
--.VOY.Z. 1985-01-13T10:14:41.50 10.0 undecidable manual PN 18 0.0258 -0.04 1.3
--.CTI.Z. 1985-01-13T10:14:40.50 10.0 undecidable manual PN 346 0.0251 -0.04 1.4
--.TRI.Z. 1985-01-13T10:14:37.00 10.0 undecidable manual PN 19 0.0227 0.05 1.4
--.FIR.N. 1985-01-13T10:14:31.00 10.0 undecidable manual SN 295 0.0093 -0.34 0.6
--.MNS.Z. 1985-01-13T10:14:30.00 10.0 undecidable manual SG 174 0.0084 1.71 0.1
--.RDP.Z. 1985-01-13T10:14:25.00 10.0 undecidable manual PN 175 0.0141 1.31 0.5
--.PO9.Z. 1985-01-13T10:14:24.00 10.0 undecidable manual SG 158 0.0072 0.26 0.7
--.BDI.Z. 1985-01-13T10:14:22.70 10.0 undecidable manual PN 298 0.0143 -1.33 0.5
--.AQU.Z. 1985-01-13T10:14:18.50 10.0 undecidable manual PN 146 0.0104 0.54 1.4
--.FIR.Z. 1985-01-13T10:14:16.00 10.0 undecidable manual PN 295 0.0093 -0.45 1.5
--.MNS.Z. 1985-01-13T10:14:14.30 10.0 undecidable manual PG 174 0.0084 -0.38 1.6
--.PO9.Z. 1985-01-13T10:14:11.40 10.0 undecidable manual PG 158 0.0072 -0.66 1.3
--.ASS.Z. 1985-01-13T10:14:06.90 10.0 undecidable manual SG 164 0.0024 0.18 1
--.PRG.Z. 1985-01-13T10:14:05.00 10.0 undecidable manual SG 206 0.0022 -1.01 0.3
--.ASS.Z. 1985-01-13T10:14:02.00 10.0 positive manual PG 164 0.0024 -0.23 3.4
--.ARV.Z. 1985-01-13T10:14:02.20 10.0 positive manual PG 58 0.003 -1.19 1.3
--.PRG.Z. 1985-01-13T10:14:01.00 10.0 undecidable manual PG 206 0.0022 -0.82 1.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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