Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 21-09-1990 and time 01:16:11 (Italy) in region 4 km E Potenza (PZ)

A magnitude Md 2.5 earthquake occured in region: 4 km E Potenza (PZ), on

  • 20-09-1990 23:16:11 (UTC)
  • 21-09-1990 01:16:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.6530, 15.8530 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
Potenza PZ 4 67122 67122
Vaglio Basilicata PZ 6 2047 69169
Brindisi Montagna PZ 9 908 70077
Pignola PZ 10 6962 77039
Cancellara PZ 11 1309 78348
Pietragalla PZ 11 4160 82508
Trivigno PZ 14 678 83186
Tolve PZ 14 3251 86437
Avigliano PZ 14 11577 98014
Abriola PZ 16 1531 99545
Anzi PZ 16 1696 101241
Ruoti PZ 17 3579 104820
Tito PZ 17 7332 112152
Oppido Lucano PZ 17 3813 115965
Albano di Lucania PZ 17 1435 117400
Acerenza PZ 18 2402 119802
Picerno PZ 18 5985 125787
San Chirico Nuovo PZ 19 1368 127155
Calvello PZ 20 1948 129103

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km E of Potenza (67122 inhabitants)
62 Km W of Altamura (70396 inhabitants)
63 Km W of Matera (60436 inhabitants)
68 Km S of Cerignola (58396 inhabitants)
74 Km E of Battipaglia (50786 inhabitants)
74 Km SW of Andria (100440 inhabitants)
82 Km SW of Barletta (94814 inhabitants)
84 Km SW of Trani (56217 inhabitants)
85 Km SW of Bisceglie (55422 inhabitants)
87 Km SW of Bitonto (55540 inhabitants)
88 Km SW of Molfetta (59874 inhabitants)
92 Km E of Salerno (135261 inhabitants)
94 Km E of Avellino (54857 inhabitants)
94 Km S of Foggia (151991 inhabitants)
97 Km E of Cava de' Tirreni (53659 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 2.5
ML-VAX 2.0 		1990-09-20
23:16:11		 40.653 15.853 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 127609
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-09-20 23:16:11 ± 0.318
Latitude 40.6530 ± 0.0224
Longitude 15.8530 ± 0.0288
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 127609

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) 3477.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1
Epicentral distance of station closest to the epicenter (degree) 0.00478
Epicentral distance of station farthest from the epicenter (degree) 0.01692
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 127609
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:58:41

ML:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 127609
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.FG2.Z. 1990-09-20T23:16:54.44 10.0 undecidable manual SN 336 1.2543 0.71 0.5
--.BAI.Z. 1990-09-20T23:16:43.00 10.0 undecidable manual SG 59 0.888 -0.55 0.7
--.GRI.Z. 1990-09-20T23:16:42.81 10.0 undecidable manual PN 166 1.8759 -1.69 0.4
--.BSS.Z. 1990-09-20T23:16:41.40 10.0 undecidable manual SG 279 0.777 1 0.5
--.ORI.Z. 1990-09-20T23:16:40.40 10.0 undecidable manual SG 143 0.7437 1.56 0.3
--.FG2.Z. 1990-09-20T23:16:37.39 10.0 undecidable manual PN 336 1.2543 1.37 0.8
--.PE1.Z. 1990-09-20T23:16:36.00 10.0 undecidable manual PN? 82 1.1988 0.86 0.5
--.MGR.Z. 1990-09-20T23:16:31.90 10.0 undecidable manual SG 204 0.555 -1.69 0.3
--.CDT.Z. 1990-09-20T23:16:30.00 10.0 undecidable manual SG 36 0.5328 -1.85 0.2
--.BAI.Z. 1990-09-20T23:16:30.00 10.0 undecidable manual PG 59 0.888 -0.15 1.9
--.BSS.Z. 1990-09-20T23:16:28.28 10.0 undecidable manual PG 279 0.777 0.16 1.9
--.ORI.Z. 1990-09-20T23:16:28.87 10.0 negative manual PG 143 0.7437 1.44 1.8
--.MGR.Z. 1990-09-20T23:16:23.16 10.0 negative manual PG 204 0.555 -0.78 3
--.CDT.Z. 1990-09-20T23:16:22.50 10.0 undecidable manual PG 36 0.5328 -0.9 1.4
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