Earthquake with magnitude of Md 2.1 on date 01-05-1999 and time 00:20:19 (Italy) in region 4 km W Aliano (MT)

A magnitude Md 2.1 earthquake occured in region: 4 km W Aliano (MT), on

  • 30-04-1999 22:20:19 (UTC)
  • 01-05-1999 00:20:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.32, 16.188 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
Aliano MT 4 1008 1008
Missanello PZ 5 566 1574
Gallicchio PZ 5 862 2436
Cirigliano MT 8 375 2811
Guardia Perticara PZ 9 552 3363
Gorgoglione MT 9 989 4352
Stigliano MT 10 4361 8713
Armento PZ 10 631 9344
Sant'Arcangelo PZ 11 6533 15877
Roccanova PZ 12 1543 17420
Corleto Perticara PZ 14 2511 19931
Castronuovo di Sant'Andrea PZ 15 1067 20998
San Martino d'Agri PZ 15 801 21799
Montemurro PZ 17 1235 23034
San Chirico Raparo PZ 17 1084 24118
Calvera PZ 19 387 24505
Accettura MT 19 1856 26361
San Mauro Forte MT 20 1552 27913
Spinoso PZ 20 1462 29375

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km SE of Potenza (67122 inhabitants)
52 Km SW of Matera (60436 inhabitants)
64 Km SW of Altamura (70396 inhabitants)
90 Km W of Taranto (201100 inhabitants)
98 Km SW of Bitonto (55540 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 2.1 1999-04-30
22:20:19
40.32 16.188 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 364539
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-04-30 22:20:19 ± 0.249
Latitude 40.3200 ± 0.0186
Longitude 16.1880 ± 0.0198
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 364539

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) 2669.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 194
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.00291
Epicentral distance of station farthest from the epicenter (degree) 0.00615
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 364539
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:41:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MU9.Z. 1999-04-30T22:20:44.76 10.0 undecidable manual SG 310 0.0062 0.32 0.6
--.MGR.Z. 1999-04-30T22:20:38.50 10.0 undecidable manual SG 249 0.0046 -0.36 0.5
--.SL9.Z. 1999-04-30T22:20:35.41 10.0 undecidable manual SG 279 0.0038 -0.6 0.3
--.MU9.Z. 1999-04-30T22:20:33.55 10.0 undecidable manual PG 310 0.0062 -0.31 1.5
--.MGR.Z. 1999-04-30T22:20:31.50 10.0 undecidable manual PG 249 0.0046 0.86 0.5
--.ORI.Z. 1999-04-30T22:20:31.81 10.0 undecidable manual SG 144 0.0029 -0.52 0.4
--.SL9.Z. 1999-04-30T22:20:29.70 10.0 undecidable manual PG 279 0.0038 0.08 2.2
--.ORI.Z. 1999-04-30T22:20:26.97 10.0 undecidable manual PG 144 0.0029 0.1 2.1
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