INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of Md 2.3 on date 26-05-1991 and time 12:36:27 (UTC) in region 2 km NE Oppido Lucano (PZ)

A magnitude Md 2.3 earthquake occured in region: 2 km NE Oppido Lucano (PZ), on

  • 26-05-1991 12:36:27 (UTC)
  • 26-05-1991 14:36:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.78, 16.01 at 0 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
Oppido Lucano PZ 2 3813 3813
Acerenza PZ 6 2402 6215
Genzano di Lucania PZ 9 5750 11965
Cancellara PZ 9 1309 13274
Banzi PZ 9 1361 14635
Tolve PZ 10 3251 17886
Pietragalla PZ 11 4160 22046
San Chirico Nuovo PZ 13 1368 23414
Vaglio Basilicata PZ 14 2047 25461
Forenza PZ 16 2122 27583
Palazzo San Gervasio PZ 17 4914 32497
Brindisi Montagna PZ 19 908 33405

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NE of Potenza (67122 inhabitants)
46 Km W of Altamura (70396 inhabitants)
51 Km W of Matera (60436 inhabitants)
55 Km S of Cerignola (58396 inhabitants)
56 Km SW of Andria (100440 inhabitants)
65 Km SW of Barletta (94814 inhabitants)
65 Km SW of Trani (56217 inhabitants)
66 Km SW of Bisceglie (55422 inhabitants)
69 Km SW of Bitonto (55540 inhabitants)
69 Km SW of Molfetta (59874 inhabitants)
82 Km W of Bari (326344 inhabitants)
86 Km SE of Foggia (151991 inhabitants)
88 Km E of Battipaglia (50786 inhabitants)
95 Km S of Manfredonia (57279 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 2.3
ML-VAX 2.1
1991-05-26
12:36:27
40.78 16.01 0 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 141909
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-05-26 12:36:27 ± 0.543
Latitude 40.78 ± 0.02
Longitude 16.01 ± 0.04
Depth (km) 0 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 141909

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) 3698.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.9
Epicentral distance of station closest to the epicenter (degree) 0.00324
Epicentral distance of station farthest from the epicenter (degree) 0.014
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:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 141909
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:12:29

ML:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 141909
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 Takeoff_angle Residual Weight
--.FG2.Z. 1991-05-26T12:37:08.97 10.0 undecidable manual SN 328 0.0108 -0.21 0.7
--.MS1.Z. 1991-05-26T12:37:02.50 10.0 undecidable manual SG 357 0.0083 1.61 0.2
--.ORI.Z. 1991-05-26T12:36:56.50 10.0 undecidable manual SG 155 0.0071 -0.63 0.7
--.CZI.Z. 1991-05-26T12:36:55.30 10.0 undecidable manual PN 176 0.014 -1.27 0.7
--.ROI.Z. 1991-05-26T12:36:54.20 10.0 undecidable manual PN 160 0.0115 1.79 0.5
--.FG2.Z. 1991-05-26T12:36:52.80 10.0 undecidable manual PN 328 0.0108 0.62 1.5
--.CSI.Z. 1991-05-26T12:36:49.84 10.0 undecidable manual PG 167 0.0091 1.56 0.8
--.MS1.Z. 1991-05-26T12:36:47.00 10.0 undecidable manual PG 357 0.0083 0.33 2
--.FG4.Z. 1991-05-26T12:36:45.91 10.0 undecidable manual SG 314 0.0046 -1.11 0.5
--.ORI.Z. 1991-05-26T12:36:43.61 10.0 undecidable manual PG 155 0.0071 -0.63 1.7
--.CDT.Z. 1991-05-26T12:36:42.00 10.0 undecidable manual SG 33 0.0032 0.7 0.7
--.FG4.Z. 1991-05-26T12:36:38.61 10.0 undecidable manual PG 314 0.0046 -0.06 2.1
--.CDT.Z. 1991-05-26T12:36:34.00 10.0 undecidable manual PG 33 0.0032 -1.36 1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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