Earthquake with magnitude of Md 4.2 on date 23-07-1986 and time 08:19:50 (UTC) in region 3 km W Potenza (PZ)

A magnitude Md 4.2 earthquake occured in region: 3 km W Potenza (PZ), on

  • 23-07-1986 08:19:50 (UTC)
  • 23-07-1986 10:19:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.64, 15.77 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
Potenza PZ 3 67122 67122
Pignola PZ 8 6962 74084
Tito PZ 10 7332 81416
Avigliano PZ 11 11577 92993
Picerno PZ 11 5985 98978
Ruoti PZ 12 3579 102557
Vaglio Basilicata PZ 13 2047 104604
Brindisi Montagna PZ 15 908 105512
Abriola PZ 15 1531 107043
Pietragalla PZ 15 4160 111203
Baragiano PZ 15 2671 113874
Satriano di Lucania PZ 15 2374 116248
Cancellara PZ 17 1309 117557
Sasso di Castalda PZ 19 835 118392
Anzi PZ 19 1696 120088
Calvello PZ 20 1948 122036
Filiano PZ 20 2926 124962
Trivigno PZ 20 678 125640
Savoia di Lucania PZ 20 1127 126767

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km W of Potenza (67122 inhabitants)
66 Km E of Battipaglia (50786 inhabitants)
69 Km W of Altamura (70396 inhabitants)
70 Km W of Matera (60436 inhabitants)
70 Km S of Cerignola (58396 inhabitants)
79 Km SW of Andria (100440 inhabitants)
85 Km E of Salerno (135261 inhabitants)
87 Km SW of Barletta (94814 inhabitants)
88 Km E of Avellino (54857 inhabitants)
89 Km SW of Trani (56217 inhabitants)
90 Km E of Cava de' Tirreni (53659 inhabitants)
91 Km SW of Bisceglie (55422 inhabitants)
93 Km S of Foggia (151991 inhabitants)
94 Km SW of Bitonto (55540 inhabitants)
94 Km SW of Molfetta (59874 inhabitants)
99 Km SE of Benevento (60091 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 4.2 1986-07-23
08:19:50
40.64 15.77 5 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 31449
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-07-23 08:19:50 ± 0.24
Latitude 40.64 ± 0.01
Longitude 15.77 ± 0.01
Depth (km) 5 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 31449

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) 1197.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00324
Epicentral distance of station farthest from the epicenter (degree) 0.06468
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 29
Magnitude information

Md:4.2

Field Value
Value 4.2
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 31449
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:32:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.STV.Z. 1986-07-23T08:21:35.70 10.0 undecidable manual PN 302 0.0647 -0.28 0.7
--.IMP.Z. 1986-07-23T08:21:29.20 10.0 undecidable manual PN 301 0.0601 0.26 0.8
--.SAL.Z. 1986-07-23T08:21:23.30 10.0 undecidable manual PN 323 0.0563 0.04 1
--.FO1.Z. 1986-07-23T08:21:23.70 10.0 undecidable manual PN 340 0.0569 -0.44 0.6
--.CTI.Z. 1986-07-23T08:21:21.50 10.0 undecidable manual PN 332 0.0555 -0.54 0.9
--.VOY.Z. 1986-07-23T08:21:13.30 10.0 undecidable manual PN 346 0.0499 -0.24 0.9
--.LJU.Z. 1986-07-23T08:21:12.50 10.0 undecidable manual PN 350 0.0492 0.1 1.1
--.CEY.Z. 1986-07-23T08:21:08.50 10.0 undecidable manual PN 349 0.0466 0.03 1.1
--.MAO.Z. 1986-07-23T08:20:50.00 10.0 undecidable manual PN 298 0.0349 -0.55 0.6
--.PZI.Z. 1986-07-23T08:20:48.00 10.0 undecidable manual PN? 190 0.0327 0.78 0.1
--.GR9.Z. 1986-07-23T08:20:47.00 10.0 undecidable manual SN 163 0.017 -0.25 0.5
--.ARV.Z. 1986-07-23T08:20:46.30 10.0 undecidable manual PN 324 0.0318 0.42 0.9
--.LCI.Z. 1986-07-23T08:20:44.00 10.0 undecidable manual SN 98 0.0162 -1.21 0
--.ASS.Z. 1986-07-23T08:20:43.80 10.0 undecidable manual PN 316 0.0301 0.53 0.7
--.GIB.Z. 1986-07-23T08:20:38.30 10.0 undecidable manual PN 207 0.0267 0.24 1.3
--.MNS.Z. 1986-07-23T08:20:37.20 10.0 undecidable manual PN 307 0.026 0.21 1.4
--.SO9.Z. 1986-07-23T08:20:33.10 10.0 undecidable manual PN 174 0.0232 0.47 0.9
--.RDP.Z. 1986-07-23T08:20:32.50 10.0 undecidable manual PN 296 0.0229 0.2 1.4
--.AQU.Z. 1986-07-23T08:20:31.80 10.0 undecidable manual PN 314 0.0221 0.72 0.4
--.MSI.Z. 1986-07-23T08:20:31.00 10.0 undecidable manual PN? 183 0.0219 0.23 0.5
--.BAI.Z. 1986-07-23T08:20:24.00 10.0 undecidable manual SG 60 0.0086 -0.06 0.6
--.GR9.Z. 1986-07-23T08:20:24.10 10.0 undecidable manual PN 163 0.017 0.88 0.2
--.LCI.Z. 1986-07-23T08:20:22.40 10.0 undecidable manual PN 98 0.0162 0.35 1.1
--.QR9.Z. 1986-07-23T08:20:15.20 10.0 undecidable manual PN 281 0.0113 0.76 0.3
--.SGG.Z. 1986-07-23T08:20:14.20 10.0 undecidable manual PN 305 0.0116 -0.72 0.4
--.PE1.Z. 1986-07-23T08:20:14.50 10.0 undecidable manual PN 81 0.0113 -0.08 1.5
--.BRT.Z. 1986-07-23T08:20:12.20 10.0 undecidable manual PG 76 0.0096 0.32 1.2
--.TS9.Z. 1986-07-23T08:20:11.40 10.0 positive manual PG 155 0.0096 -0.54 1.4
--.BAI.Z. 1986-07-23T08:20:10.00 10.0 undecidable manual PG 60 0.0086 0.16 1.4
--.ORI.Z. 1986-07-23T08:20:06.60 10.0 positive manual PG 138 0.007 0.04 3
--.MG9.Z. 1986-07-23T08:20:01.50 10.0 positive manual PG 197 0.0047 -0.37 2.1
--.SGO.Z. 1986-07-23T08:19:58.30 10.0 positive manual PG 256 0.0032 -0.16 2.8
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