Earthquake with magnitude of Md 3.3 on date 21-01-1987 and time 06:56:59 (UTC) in region 5 km W Visso (MC)

A magnitude Md 3.3 earthquake occured in region: 5 km W Visso (MC), on

  • 21-01-1987 06:56:59 (UTC)
  • 21-01-1987 07:56:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.95, 13.03 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
Visso MC 5 1107 1107
Monte Cavallo MC 5 145 1252
Preci PG 8 724 1976
Ussita MC 9 444 2420
Pieve Torina MC 11 1458 3878
Fiordimonte MC 11 202 4080
Sellano PG 11 1079 5159
Castelsantangelo sul Nera MC 12 281 5440
Pievebovigliana MC 13 866 6306
Fiastra MC 14 559 6865
Acquacanina MC 15 121 6986
Muccia MC 15 915 7901
Serravalle di Chienti MC 15 1070 8971
Bolognola MC 17 142 9113
Cerreto di Spoleto PG 17 1075 10188
Norcia PG 18 4957 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Foligno (57155 inhabitants)
54 Km NE of Terni (111501 inhabitants)
55 Km E of Perugia (166134 inhabitants)
64 Km NW of Teramo (54892 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
96 Km NE of Viterbo (67173 inhabitants)
99 Km S of Fano (60888 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 3.3 1987-01-21
06:56:59
42.95 13.03 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 39589
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-01-21 06:56:59 ± 0.192
Latitude 42.95 ± 0.01
Longitude 13.03 ± 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 39589

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) 2573.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 41
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00267
Epicentral distance of station farthest from the epicenter (degree) 0.06994
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 34
Magnitude information

Md:3.3

Field Value
Value 3.3
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 39589
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:39:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.LOR.Z. 1987-01-21T06:58:53.40 10.0 undecidable manual PN 306 0.0699 0.2 0.9
--.LBF.Z. 1987-01-21T06:58:51.20 10.0 undecidable manual PN 305 0.068 0.89 0.7
--.CDF.Z. 1987-01-21T06:58:40.50 10.0 undecidable manual PN 325 0.061 0.98 0.6
--.BSF.Z. 1987-01-21T06:58:36.20 10.0 undecidable manual PN 320 0.0589 -0.27 1
--.KHC.Z. 1987-01-21T06:58:32.00 10.0 undecidable manual PN 3 0.0557 0.56 0.9
--.VBY.Z. 1987-01-21T06:58:24.60 10.0 undecidable manual SN 30 0.027 1.56 0.2
--.CEY.Z. 1987-01-21T06:58:23.40 10.0 undecidable manual SN 18 0.0266 1.54 0.2
--.LPG.Z. 1987-01-21T06:58:19.40 10.0 undecidable manual PN 301 0.0465 1.97 0.2
--.LPL.Z. 1987-01-21T06:58:19.50 10.0 undecidable manual PN 301 0.0466 1.79 0.3
--.SAX.Z. 1987-01-21T06:58:17.00 10.0 undecidable manual PN 329 0.0452 1.55 0.4
--.LMR.Z. 1987-01-21T06:58:12.50 10.0 undecidable manual PN 276 0.0429 0.51 1.2
--.FRF.Z. 1987-01-21T06:58:11.00 10.0 undecidable manual PN 279 0.0422 0.17 1.3
--.TMA.Z. 1987-01-21T06:58:05.70 10.0 undecidable manual PN 317 0.0389 -0.19 1.3
--.VAI.Z. 1987-01-21T06:58:04.00 10.0 undecidable manual PN 315 0.0379 -0.32 1.3
--.KBA.Z. 1987-01-21T06:58:03.50 10.0 positive manual PN 2 0.0372 0.29 2.6
--.FO1.Z. 1987-01-21T06:57:57.00 10.0 undecidable manual PN 357 0.0328 0.46 1.3
--.MDI.Z. 1987-01-21T06:57:57.50 10.0 undecidable manual PN 320 0.0332 0.37 1.4
--.RBL.Z. 1987-01-21T06:57:55.20 10.0 undecidable manual PN 5 0.0316 0.54 1.3
--.CTI.Z. 1987-01-21T06:57:51.00 10.0 undecidable manual PN 342 0.0292 -0.08 1.6
--.LJU.Z. 1987-01-21T06:57:51.70 10.0 undecidable manual PN 18 0.0294 0.32 1.5
--.VBY.Z. 1987-01-21T06:57:48.50 10.0 undecidable manual PN 30 0.027 0.7 1.2
--.VOY.Z. 1987-01-21T06:57:48.90 10.0 undecidable manual PN 10 0.0283 -0.7 1.4
--.CEY.Z. 1987-01-21T06:57:47.10 10.0 undecidable manual PN 18 0.0266 -0.02 1.6
--.SGO.Z. 1987-01-21T06:57:47.50 10.0 undecidable manual PN 143 0.0263 0.77 1.2
--.TRI.Z. 1987-01-21T06:57:44.00 10.0 undecidable manual PN 10 0.0252 -1.01 1.1
--.MF9.Z. 1987-01-21T06:57:41.80 10.0 undecidable manual SN 317 0.0113 0.52 0.6
--.RMP.Z. 1987-01-21T06:57:38.50 10.0 undecidable manual SN 191 0.0104 -0.69 0.5
--.BDI.Z. 1987-01-21T06:57:34.50 10.0 undecidable manual PN 302 0.0187 -0.63 1.4
--.MSC.Z. 1987-01-21T06:57:33.60 10.0 undecidable manual PN 157 0.017 1.14 0.9
--.DUI.Z. 1987-01-21T06:57:30.70 10.0 undecidable manual PN 140 0.015 1.33 0.8
--.AM8.Z. 1987-01-21T06:57:25.78 10.0 undecidable manual SG 34 0.0065 -0.09 1
--.MF9.Z. 1987-01-21T06:57:24.50 10.0 undecidable manual PN 317 0.0113 0.81 1.2
--.SD1.Z. 1987-01-21T06:57:24.50 10.0 undecidable manual PN 154 0.0123 -0.77 1.2
--.AQU.Z. 1987-01-21T06:57:23.00 10.0 undecidable manual SG 155 0.0058 -0.57 0.5
--.RMP.Z. 1987-01-21T06:57:21.50 10.0 undecidable manual PN 191 0.0104 -0.98 1
--.CRE.Z. 1987-01-21T06:57:20.20 10.0 undecidable manual PG 310 0.0092 -0.25 1.6
--.ARV.Z. 1987-01-21T06:57:19.50 10.0 undecidable manual SG 353 0.0049 -0.73 0.8
--.AQU.Z. 1987-01-21T06:57:12.00 10.0 undecidable manual PG 155 0.0058 -1.46 0.6
--.AM8.Z. 1987-01-21T06:57:12.80 10.0 positive manual PG 34 0.0065 -1.99 0.8
--.ARV.Z. 1987-01-21T06:57:09.60 10.0 negative manual PG 353 0.0049 -1.94 0.8
--.ASS.Z. 1987-01-21T06:57:04.50 10.0 negative manual PG 291 0.0027 -1.89 0.7
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