Earthquake with magnitude of Md 3.0 on date 17-02-1986 and time 16:39:28 (Italy) in region 2 km N Spoleto (PG)

A magnitude Md 3.0 earthquake occured in region: 2 km N Spoleto (PG), on

  • 17-02-1986 15:39:28 (UTC)
  • 17-02-1986 16:39:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.75, 12.74 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
Spoleto PG 2 38218 38218
Sant'Anatolia di Narco PG 8 564 38782
Campello sul Clitunno PG 8 2442 41224
Scheggino PG 9 461 41685
Castel Ritaldi PG 10 3278 44963
Vallo di Nera PG 10 364 45327
Trevi PG 14 8469 53796
Ferentillo TR 15 1913 55709
Giano dell'Umbria PG 16 3846 59555
Cerreto di Spoleto PG 17 1075 60630
Poggiodomo PG 17 117 60747
Acquasparta TR 17 4778 65525
Montefranco TR 17 1276 66801
Montefalco PG 17 5679 72480
Massa Martana PG 18 3770 76250
Arrone TR 19 2763 79013

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NE of Terni (111501 inhabitants)
23 Km S of Foligno (57155 inhabitants)
49 Km SE of Perugia (166134 inhabitants)
64 Km NE of Viterbo (67173 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
80 Km W of Teramo (54892 inhabitants)
83 Km N of Guidonia Montecelio (88673 inhabitants)
88 Km N of Tivoli (56533 inhabitants)
98 Km N of Roma (2864731 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 3.0 1986-02-17
15:39:28
42.75 12.74 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 22809
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-02-17 15:39:28 ± 0.191
Latitude 42.75 ± 0.01
Longitude 12.74 ± 0.03
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 22809

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) 2673
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
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) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.03359
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitude information

Md:3

Field Value
Value 3
Uncertainty
Num. used stations 7
Type of magnitude Md
Reference to an origin 22809
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:24:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RBL.Z. 1986-02-17T15:40:28.00 10.0 undecidable manual PN 8 0.0336 1.15 0.4
--.LJU.Z. 1986-02-17T15:40:24.60 10.0 undecidable manual PN 20 0.0317 0.56 0.8
--.CTI.Z. 1986-02-17T15:40:22.50 10.0 undecidable manual PN 347 0.0304 0.45 0.9
--.VOY.Z. 1986-02-17T15:40:21.90 10.0 undecidable manual PN 13 0.0304 -0.1 1
--.CEY.Z. 1986-02-17T15:40:21.70 10.0 undecidable manual PN 21 0.029 1.89 0.1
--.SAL.Z. 1986-02-17T15:40:20.00 10.0 undecidable manual PN 331 0.0294 -0.41 0.9
--.TRI.Z. 1986-02-17T15:40:17.50 10.0 undecidable manual PN 13 0.0274 0.1 1.1
--.CRE.Z. 1986-02-17T15:40:05.50 10.0 undecidable manual SG 326 0.0093 0.48 0.5
--.RDP.Z. 1986-02-17T15:40:04.00 10.0 undecidable manual SG 180 0.0089 0.52 0.5
--.BDI.Z. 1986-02-17T15:40:04.00 10.0 undecidable manual PN 310 0.0183 0.5 1.2
--.PS9.Z. 1986-02-17T15:40:02.50 10.0 undecidable manual PN 301 0.0169 1.09 0.6
--.ARV.Z. 1986-02-17T15:39:55.50 10.0 undecidable manual SG 11 0.0068 -0.58 0.5
--.SD1.Z. 1986-02-17T15:39:55.00 10.0 undecidable manual PN 142 0.0117 1.44 0.3
--.MAO.Z. 1986-02-17T15:39:52.00 10.0 undecidable manual PN 254 0.0108 -0.24 1.4
--.CRE.Z. 1986-02-17T15:39:49.50 10.0 undecidable manual PG 326 0.0093 -0.19 1.5
--.RDP.Z. 1986-02-17T15:39:48.00 10.0 undecidable manual PG 180 0.0089 -0.8 0.9
--.AM8.Z. 1986-02-17T15:39:48.96 10.0 undecidable manual PG 37 0.0091 -0.27 2.8
--.ARV.Z. 1986-02-17T15:39:43.00 10.0 undecidable manual PG 11 0.0068 -1.53 0.3
--.AQU.Z. 1986-02-17T15:39:41.50 10.0 undecidable manual PG 128 0.0057 -0.58 1.2
--.MNS.Z. 1986-02-17T15:39:36.50 10.0 negative manual PG 186 0.0033 -0.51 2.5
--.ASS.Z. 1986-02-17T15:39:34.90 10.0 negative manual PG 348 0.0028 -0.98 1.5
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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