Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 3.0 on date 20-10-1987 and time 01:33:26 (Italy) in region 2 km N Meduno (PN)

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

  • 20-10-1987 00:33:26 (UTC)
  • 20-10-1987 01:33:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.24, 12.79 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.

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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
Meduno PN 3 1574 1574
Tramonti di Sotto PN 5 387 1961
Cavasso Nuovo PN 5 1525 3486
Frisanco PN 6 622 4108
Fanna PN 6 1583 5691
Tramonti di Sopra PN 8 321 6012
Travesio PN 8 1776 7788
Sequals PN 9 2200 9988
Maniago PN 10 11698 21686
Clauzetto PN 10 380 22066
Castelnovo del Friuli PN 10 880 22946
Arba PN 10 1309 24255
Vajont PN 12 1719 25974
Vito d'Asio PN 13 769 26743
Pinzano al Tagliamento PN 14 1525 28268
Montereale Valcellina PN 14 4433 32701
Andreis PN 14 259 32960
Forgaria nel Friuli UD 14 1786 34746
Ragogna UD 16 2909 37655
Spilimbergo PN 17 12124 49779
Barcis PN 18 256 50035
Preone UD 18 246 50281
Vivaro PN 18 1352 51633
Socchieve UD 19 908 52541
San Daniele del Friuli UD 19 8013 60554
Forni di Sotto UD 19 600 61154
Ampezzo UD 20 1006 62160

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NE of Pordenone (51229 inhabitants)
40 Km W of Udine (99169 inhabitants)
76 Km NE of Treviso (83731 inhabitants)
96 Km NE of Venezia (263352 inhabitants)
100 Km NW of Trieste (204420 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
M 3.3 		1987-10-20
00:33:26		 46.24 12.79 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 57259
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-10-20 00:33:26 ± 0.082
Latitude 46.24 ± 0.01
Longitude 12.79 ± 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 57259

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) 1195.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 40
Number of associated phases, regardless of their use for origin computation 88
Number of defining phases 88
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00202
Epicentral distance of station farthest from the epicenter (degree) 0.06168
Number of stations at which the event was observed 68
Number of stations from which data was used for origin computation 68
Magnitudes information

Md:3

Field Value
Value 3
Uncertainty
Num. used stations 16
Type of magnitude Md
Reference to an origin 57259
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:54:55

M:3.3

Field Value
Value 3.3
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 57259
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:42:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.BGF.Z. 1987-10-20T00:36:22.70 10.0 undecidable manual SN 276 0.0617 0.89 0.2
--.DOU.Z. 1987-10-20T00:36:18.30 10.0 undecidable manual SN 308 0.0601 0.61 0.3
--.LOR.Z. 1987-10-20T00:36:06.70 10.0 undecidable manual SN 283 0.0558 0.55 0.4
--.SMF.Z. 1987-10-20T00:36:06.10 10.0 undecidable manual SN 277 0.0555 0.54 0.4
--.LBF.Z. 1987-10-20T00:36:04.60 10.0 undecidable manual SN 280 0.0548 0.95 0.2
--.LMR.Z. 1987-10-20T00:35:45.10 10.0 undecidable manual SN 239 0.0478 -0.12 0.5
--.FRF.Z. 1987-10-20T00:35:40.30 10.0 undecidable manual SN 240 0.0459 0.09 0.5
--.HAU.Z. 1987-10-20T00:35:31.70 10.0 undecidable manual SN 294 0.0424 0.64 0.4
--.CVF.Z. 1987-10-20T00:35:27.30 10.0 undecidable manual SN 218 0.0415 -1.25 0.1
--.SBF.Z. 1987-10-20T00:35:24.10 10.0 undecidable manual SN 239 0.0401 -0.84 0.3
--.BSF.Z. 1987-10-20T00:35:23.70 10.0 undecidable manual SN 293 0.0394 0.69 0.4
--.CDF.Z. 1987-10-20T00:35:22.10 10.0 undecidable manual SN 302 0.0389 0.6 0.4
--.BGF.Z. 1987-10-20T00:35:08.00 10.0 undecidable manual PN 276 0.0617 0.09 1.1
--.FIN.Z. 1987-10-20T00:35:06.50 10.0 undecidable manual SN! 239 0.0342 -2.89 0
--.DOU.Z. 1987-10-20T00:35:06.80 10.0 undecidable manual PN 308 0.0601 1.27 0.2
--.LOR.Z. 1987-10-20T00:34:58.10 10.0 undecidable manual PN 283 0.0558 -0.77 0.6
--.ORX.Z. 1987-10-20T00:34:58.50 10.0 undecidable manual SN 261 0.0305 -1.04 0.2
--.SMF.Z. 1987-10-20T00:34:58.10 10.0 undecidable manual PN 277 0.0555 -0.43 1
--.GEN.Z. 1987-10-20T00:34:56.90 10.0 undecidable manual SN 237 0.0293 0.58 0.5
--.LBF.Z. 1987-10-20T00:34:56.70 10.0 undecidable manual PN 280 0.0548 -0.73 0.7
--.LMR.Z. 1987-10-20T00:34:47.00 10.0 undecidable manual PN 239 0.0478 0.21 1.3
--.CRE.Z. 1987-10-20T00:34:44.33 10.0 undecidable manual SN 193 0.0241 1.69 0
--.FRF.Z. 1987-10-20T00:34:43.30 10.0 undecidable manual PN 240 0.0459 -0.59 0.9
--.HAU.Z. 1987-10-20T00:34:38.20 10.0 undecidable manual PN 294 0.0424 -0.41 1.2
--.CVF.Z. 1987-10-20T00:34:37.00 10.0 undecidable manual PN 218 0.0415 -0.16 1.4
--.SDI.Z. 1987-10-20T00:34:37.25 10.0 undecidable manual PN 170 0.0413 0.48 1.1
--.SS9.Z. 1987-10-20T00:34:37.40 10.0 undecidable manual SN 196 0.0216 0.93 0.3
--.MOX.Z. 1987-10-20T00:34:34.50 10.0 undecidable manual PN 350 0.0402 -0.69 0.9
--.GWF.Z. 1987-10-20T00:34:34.20 10.0 undecidable manual PN 310 0.0398 -0.38 1.3
--.SBF.Z. 1987-10-20T00:34:34.80 10.0 undecidable manual PN 239 0.0401 -0.28 1.3
--.STV.Z. 1987-10-20T00:34:33.40 10.0 undecidable manual PN 244 0.0389 0.23 1.4
--.BSF.Z. 1987-10-20T00:34:33.70 10.0 undecidable manual PN 293 0.0394 -0.26 1.4
--.LPG.Z. 1987-10-20T00:34:33.10 10.0 undecidable manual PN 262 0.0384 0.74 0.8
--.BNI.Z. 1987-10-20T00:34:33.66 10.0 undecidable manual PN 256 0.0398 -0.96 0.6
--.LPL.Z. 1987-10-20T00:34:33.00 10.0 undecidable manual PN 262 0.0384 0.52 1.1
--.RRL.Z. 1987-10-20T00:34:32.80 10.0 undecidable manual PN 254 0.0396 -1.43 0.2
--.CDF.Z. 1987-10-20T00:34:32.80 10.0 undecidable manual PN 302 0.0389 -0.29 1.4
--.DOI.Z. 1987-10-20T00:34:31.00 10.0 undecidable manual PN 248 0.0383 -1.29 0.3
--.MOF.Z. 1987-10-20T00:34:31.00 10.0 undecidable manual PN 295 0.0376 -0.1 1.5
--.SOO.Z. 1987-10-20T00:34:30.60 10.0 undecidable manual PN! 248 0.0392 -2.95 0
--.IMP.Z. 1987-10-20T00:34:29.90 10.0 undecidable manual PN 238 0.0374 -1.04 0.5
--.MDI.Z. 1987-10-20T00:34:29.78 10.0 undecidable manual SN 259 0.0197 -1 0.2
--.LSD.Z. 1987-10-20T00:34:27.90 10.0 undecidable manual PN 260 0.0359 -0.78 0.8
--.ROB.Z. 1987-10-20T00:34:27.60 10.0 undecidable manual PN 242 0.0356 -0.6 1.1
--.PRU.Z. 1987-10-20T00:34:27.90 10.0 undecidable manual PN 16 0.0353 0.23 1.5
--.RSP.Z. 1987-10-20T00:34:26.50 10.0 undecidable manual PN! 256 0.0361 -2.36 0
--.FIN.Z. 1987-10-20T00:34:25.10 10.0 undecidable manual PN 239 0.0342 -1 0.5
--.CKI.Z. 1987-10-20T00:34:24.27 10.0 undecidable manual PN 241 0.0329 0.31 1.5
--.FEL.Z. 1987-10-20T00:34:23.60 10.0 undecidable manual PN 298 0.0327 -0.12 1.6
--.ALP.Z. 1987-10-20T00:34:21.80 10.0 undecidable manual PN 170 0.0315 -0.07 1.6
--.ORX.Z. 1987-10-20T00:34:20.30 10.0 undecidable manual PN 261 0.0305 -0.11 1.6
--.GEN.Z. 1987-10-20T00:34:19.50 10.0 undecidable manual PN 237 0.0293 0.95 0.6
--.SLE.Z. 1987-10-20T00:34:19.00 10.0 undecidable manual PN 299 0.0297 -0.12 1.6
--.SAL.Z. 1987-10-20T00:34:19.47 10.0 undecidable manual SN 249 0.0152 0.35 0.6
--.ZLA.Z. 1987-10-20T00:34:18.70 10.0 undecidable manual PN 294 0.0293 0.11 1.6
--.ASS.Z. 1987-10-20T00:34:17.87 10.0 undecidable manual PN 182 0.0286 0.46 1.3
--.VKA.Z. 1987-10-20T00:34:17.50 10.0 undecidable manual PN 48 0.0282 0.67 1
--.CM8.Z. 1987-10-20T00:34:16.90 10.0 undecidable manual PN 175 0.0274 0.37 1.4
--.KHC.Z. 1987-10-20T00:34:14.50 10.0 undecidable manual PN 10 0.0264 0.37 2.9
--.PII.Z. 1987-10-20T00:34:13.93 10.0 undecidable manual PN 213 0.0268 -0.83 0.8
--.VEA.Z. 1987-10-20T00:34:13.00 10.0 undecidable manual PN! 240 0.0233 3.56 0
--.VAI.Z. 1987-10-20T00:34:12.17 10.0 undecidable manual PN 264 0.0253 -0.23 1.6
--.BOB.Z. 1987-10-20T00:34:12.10 10.0 undecidable manual PN 239 0.0249 0.26 1.5
--.AM8.Z. 1987-10-20T00:34:12.40 10.0 undecidable manual PN 167 0.0247 0.85 0.8
--.BVT.Z. 1987-10-20T00:34:12.00 10.0 undecidable manual PN 231 0.0246 0.67 1
--.LLS.Z. 1987-10-20T00:34:11.80 10.0 undecidable manual PN 284 0.024 1.37 0.2
--.CRE.Z. 1987-10-20T00:34:11.30 10.0 undecidable manual PN 193 0.0241 0.64 1.1
--.ARV.Z. 1987-10-20T00:34:11.73 10.0 negative manual PN 177 0.0246 0.3 3
--.SAX.Z. 1987-10-20T00:34:10.20 10.0 undecidable manual PN 294 0.0231 1.18 0.4
--.MME.Z. 1987-10-20T00:34:09.45 10.0 undecidable manual PN 216 0.0227 1.07 0.5
--.PGD.Z. 1987-10-20T00:34:07.50 10.0 undecidable manual PN 198 0.0223 -0.8 0.8
--.PRO.Z. 1987-10-20T00:34:06.20 10.0 undecidable manual PN 178 0.0208 0.55 1.2
--.VDL.Z. 1987-10-20T00:34:06.60 10.0 undecidable manual PN 277 0.0207 1.19 0.4
--.SS9.Z. 1987-10-20T00:34:05.81 10.0 undecidable manual PN 196 0.0216 -1.07 0.5
--.PTJ.Z. 1987-10-20T00:34:05.50 10.0 undecidable manual PN 97 0.0201 1.06 0.5
--.MDI.Z. 1987-10-20T00:34:03.57 10.0 undecidable manual PN 259 0.0197 -0.24 1.6
--.OSS.Z. 1987-10-20T00:33:59.40 10.0 negative manual PN 284 0.0168 -0.14 3.2
--.SAL.Z. 1987-10-20T00:33:57.18 10.0 undecidable manual PN 249 0.0152 0.11 1.6
--.BHG.Z. 1987-10-20T00:33:53.90 10.0 positive manual PN 2 0.0133 -0.24 3.1
--.CEY.Z. 1987-10-20T00:33:51.90 10.0 undecidable manual PN 113 0.0112 1.05 1
--.RBL.Z. 1987-10-20T00:33:48.00 10.0 undecidable manual SG 69 0.0051 -0.23 0.6
--.TRI.Z. 1987-10-20T00:33:44.00 10.0 undecidable manual PG 127 0.0077 -0.56 2.4
--.VOY.Z. 1987-10-20T00:33:42.70 10.0 undecidable manual PG 105 0.0071 -0.6 2.3
--.DRE.Z. 1987-10-20T00:33:39.00 10.0 undecidable manual PG 96 0.0053 -0.63 2.2
--.RBL.Z. 1987-10-20T00:33:38.17 10.0 undecidable manual PG 69 0.0051 -1.07 0.5
--.BUA.Z. 1987-10-20T00:33:32.70 10.0 undecidable manual PG 95 0.002 0.49 2.6
--.FVI.Z. 1987-10-20T00:33:32.31 10.0 negative manual PG! 359 0.0032 -2.58 0
--.BOO.Z. 1987-10-20T00:33:31.80 10.0 undecidable manual PG 69 0.002 -0.35 2.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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