Earthquake with magnitude of Md 3.1 on date 05-05-1987 and time 20:21:43 (Italy) in region 4 km E Vallo di Nera (PG)

A magnitude Md 3.1 earthquake occured in region: 4 km E Vallo di Nera (PG), on

  • 05-05-1987 18:21:43 (UTC)
  • 05-05-1987 20:21:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.76, 12.91 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
Vallo di Nera PG 4 364 364
Poggiodomo PG 6 117 481
Cerreto di Spoleto PG 7 1075 1556
Sant'Anatolia di Narco PG 7 564 2120
Scheggino PG 9 461 2581
Cascia PG 10 3217 5798
Monteleone di Spoleto PG 13 599 6397
Campello sul Clitunno PG 13 2442 8839
Sellano PG 14 1079 9918
Spoleto PG 14 38218 48136
Norcia PG 15 4957 53093
Preci PG 17 724 53817
Ferentillo TR 19 1913 55730
Trevi PG 19 8469 64199

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SE of Foligno (57155 inhabitants)
31 Km NE of Terni (111501 inhabitants)
57 Km SE of Perugia (166134 inhabitants)
61 Km NW of L'Aquila (69753 inhabitants)
66 Km W of Teramo (54892 inhabitants)
76 Km NE of Viterbo (67173 inhabitants)
86 Km N of Guidonia Montecelio (88673 inhabitants)
89 Km N of Tivoli (56533 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 1987-05-05
18:21:43
42.76 12.91 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 46379
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-05-05 18:21:43 ± 0.189
Latitude 42.76 ± 0.01
Longitude 12.91 ± 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 46379

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) 2625.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
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) 0.00316
Epicentral distance of station farthest from the epicenter (degree) 0.03853
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 24
Magnitude information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 7
Type of magnitude Md
Reference to an origin 46379
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:45:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.VAI.Z. 1987-05-05T18:22:50.00 10.0 undecidable manual PN 317 0.0385 1.1 0.7
--.MDI.Z. 1987-05-05T18:22:43.00 10.0 undecidable manual PN 323 0.034 1.02 0.8
--.FVI.Z. 1987-05-05T18:22:43.50 10.0 undecidable manual PN 358 0.0344 0.89 0.9
--.RBL.Z. 1987-05-05T18:22:42.00 10.0 undecidable manual PN 6 0.0334 1.1 0.8
--.CTI.Z. 1987-05-05T18:22:37.00 10.0 undecidable manual PN 344 0.0306 0.23 1.4
--.VOY.Z. 1987-05-05T18:22:36.30 10.0 undecidable manual PN 11 0.03 0.4 1.3
--.LJU.Z. 1987-05-05T18:22:36.00 10.0 undecidable manual PN 18 0.0312 -1.75 0.3
--.CEY.Z. 1987-05-05T18:22:34.60 10.0 undecidable manual PN 19 0.0285 1.11 0.8
--.BOB.Z. 1987-05-05T18:22:33.50 10.0 undecidable manual PN 309 0.0288 -0.51 1.3
--.TRI.Z. 1987-05-05T18:22:31.50 10.0 undecidable manual PN 11 0.027 0.19 1.5
--.SGO.Z. 1987-05-05T18:22:30.00 10.0 undecidable manual PN 139 0.0255 1.03 1
--.PGD.Z. 1987-05-05T18:22:30.00 10.0 undecidable manual SN 322 0.0126 1.45 0.3
--.SDI.Z. 1987-05-05T18:22:26.00 10.0 undecidable manual SN 147 0.0112 1.37 0.3
--.BDI.Z. 1987-05-05T18:22:20.50 10.0 undecidable manual PN 308 0.0191 1.31 0.9
--.RDP.Z. 1987-05-05T18:22:20.00 10.0 undecidable manual SG 188 0.0091 1.41 0.3
--.PII.Z. 1987-05-05T18:22:18.00 10.0 undecidable manual PN 299 0.0178 0.73 1.5
--.RMP.Z. 1987-05-05T18:22:17.00 10.0 undecidable manual SG 189 0.0087 0.02 0.8
--.CP9.Z. 1987-05-05T18:22:17.50 10.0 undecidable manual SG 177 0.0081 2.53 0
--.AM8.Z. 1987-05-05T18:22:16.72 10.0 undecidable manual SG 32 0.0083 0.71 0.6
--.PGD.Z. 1987-05-05T18:22:09.00 10.0 undecidable manual PN 322 0.0126 -0.38 1.9
--.ARV.Z. 1987-05-05T18:22:08.50 10.0 undecidable manual SG 1 0.0066 -1.2 0.4
--.SDI.Z. 1987-05-05T18:22:07.50 10.0 undecidable manual PN 147 0.0112 0.38 1.9
--.AQU.Z. 1987-05-05T18:22:04.50 10.0 undecidable manual SG 138 0.0049 0.95 0.8
--.RDP.Z. 1987-05-05T18:22:03.00 10.0 undecidable manual PG 188 0.0091 -0.63 1.7
--.AM8.Z. 1987-05-05T18:22:01.50 10.0 undecidable manual PG 32 0.0083 -0.63 1.7
--.RMP.Z. 1987-05-05T18:22:01.00 10.0 undecidable manual PG 189 0.0087 -1.7 0.5
--.CP9.Z. 1987-05-05T18:22:01.00 10.0 undecidable manual PG 177 0.0081 -0.54 1.8
--.MNS.Z. 1987-05-05T18:21:58.00 10.0 undecidable manual SG 204 0.0037 -1.23 0.6
--.ARV.Z. 1987-05-05T18:21:57.30 10.0 undecidable manual PG 1 0.0066 -1.2 1.1
--.ASS.Z. 1987-05-05T18:21:56.00 10.0 undecidable manual SG 327 0.0032 -0.97 0.5
--.AQU.Z. 1987-05-05T18:21:53.50 10.0 undecidable manual PG 138 0.0049 -1.44 0.8
--.MNS.Z. 1987-05-05T18:21:52.00 10.0 undecidable manual PG 204 0.0037 -0.45 1.9
--.CM8.Z. 1987-05-05T18:21:52.10 10.0 undecidable manual PG 21 0.0041 -1.34 0.9
--.ASS.Z. 1987-05-05T18:21:50.50 10.0 undecidable manual PG 327 0.0032 -0.65 1.7
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download