Earthquake with magnitude of Md 3.1 on date 20-04-1987 and time 05:01:08 (Italy) in region 8 km SW Cantiano (PU)

A magnitude Md 3.1 earthquake occured in region: 8 km SW Cantiano (PU), on

  • 20-04-1987 03:01:08 (UTC)
  • 20-04-1987 05:01:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.43, 12.56 at 5 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
Cantiano PU 8 2245 2245
Gubbio PG 9 32216 34461
Pietralunga PG 10 2111 36572
Scheggia e Pascelupo PG 10 1393 37965
Cagli PU 15 8731 46696
Costacciaro PG 15 1216 47912
Frontone PU 18 1300 49212
Apecchio PU 18 1882 51094
Piobbico PU 18 2029 53123
Serra Sant'Abbondio PU 19 1027 54150
Sigillo PG 19 2404 56554
Montone PG 20 1680 58234

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NE of Perugia (166134 inhabitants)
54 Km N of Foligno (57155 inhabitants)
54 Km E of Arezzo (99543 inhabitants)
59 Km SW of Fano (60888 inhabitants)
61 Km SW of Pesaro (94582 inhabitants)
70 Km S of Rimini (147750 inhabitants)
81 Km W of Ancona (100861 inhabitants)
82 Km SE of Cesena (96758 inhabitants)
97 Km N of Terni (111501 inhabitants)
97 Km SE of Forlì (117913 inhabitants)
100 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 3.1 1987-04-20
03:01:08
43.43 12.56 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 45289
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-20 03:01:08 ± 0.145
Latitude 43.43 ± 0.01
Longitude 12.56 ± 0.01
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 45289

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) 1679.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
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) 0.00259
Epicentral distance of station farthest from the epicenter (degree) 0.02776
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitude information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 45289
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:44:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RBL.Z. 1987-04-20T03:01:57.50 10.0 undecidable manual PN 13 0.0278 -0.29 1
--.VOY.Z. 1987-04-20T03:01:54.20 10.0 undecidable manual PN 19 0.0249 0.87 0.5
--.TRI.Z. 1987-04-20T03:01:48.00 10.0 undecidable manual PN 20 0.0219 -0.75 0.6
--.SD1.Z. 1987-04-20T03:01:43.00 10.0 undecidable manual PN 151 0.0176 0.83 0.6
--.RDP.Z. 1987-04-20T03:01:39.00 10.0 undecidable manual PN 176 0.0151 0.63 1
--.RMP.Z. 1987-04-20T03:01:38.00 10.0 undecidable manual PN 176 0.0146 0.37 1.4
--.PS9.Z. 1987-04-20T03:01:37.00 10.0 undecidable manual PN 282 0.0134 1.07 0.4
--.CP9.Z. 1987-04-20T03:01:36.50 10.0 undecidable manual PN 169 0.0143 -0.76 0.8
--.BDI.Z. 1987-04-20T03:01:36.50 10.0 undecidable manual PN 294 0.0139 -0.1 1.6
--.AQU.Z. 1987-04-20T03:01:33.00 10.0 undecidable manual PN 150 0.0112 0.59 1.2
--.CM8.Z. 1987-04-20T03:01:27.55 10.0 undecidable manual SG 119 0.0044 0.46 0.6
--.CRE.Z. 1987-04-20T03:01:26.50 10.0 undecidable manual SG 293 0.0042 -0.18 0.7
--.AM8.Z. 1987-04-20T03:01:24.26 10.0 undecidable manual PG 81 0.0069 -0.13 1.9
--.PGD.Z. 1987-04-20T03:01:23.50 10.0 undecidable manual PG 306 0.0067 -0.54 1.4
--.ASS.Z. 1987-04-20T03:01:22.00 10.0 undecidable manual SG 169 0.0033 -1.09 0.3
--.ARV.Z. 1987-04-20T03:01:20.50 10.0 undecidable manual SG 76 0.0026 0.69 0.7
--.CRE.Z. 1987-04-20T03:01:18.50 10.0 undecidable manual PG 293 0.0042 -0.5 1.4
--.CM8.Z. 1987-04-20T03:01:18.78 10.0 undecidable manual PG 119 0.0044 -0.46 1.5
--.PRG.Z. 1987-04-20T03:01:17.00 10.0 undecidable manual PG 199 0.0031 0.65 1.2
--.ASS.Z. 1987-04-20T03:01:16.10 10.0 undecidable manual PG 169 0.0033 -0.83 0.8
--.ARV.Z. 1987-04-20T03:01:14.50 10.0 undecidable manual PG 76 0.0026 -0.54 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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