Earthquake (quarry blast) with magnitude of ML 1.7 on date 21-08-2019 and time 09:31:12 (Italy) in region 8 km E Matera (MT)

A magnitude ML 1.7 (quarry blast) earthquake occured in region: 8 km E Matera (MT), on

  • 21-08-2019 07:31:12 (UTC)
  • 21-08-2019 09:31:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.69, 16.69 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

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
Matera MT 8 60436 60436
Laterza TA 12 15290 75726
Santeramo in Colle BA 13 26734 102460
Ginosa TA 14 22632 125092
Montescaglioso MT 16 9942 135034
Altamura BA 19 70396 205430

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km E of Matera (60436 inhabitants)
19 Km SE of Altamura (70396 inhabitants)
46 Km S of Bitonto (55540 inhabitants)
51 Km SW of Bari (326344 inhabitants)
52 Km W of Taranto (201100 inhabitants)
57 Km S of Molfetta (59874 inhabitants)
63 Km S of Bisceglie (55422 inhabitants)
68 Km SE of Andria (100440 inhabitants)
68 Km SE of Trani (56217 inhabitants)
75 Km E of Potenza (67122 inhabitants)
78 Km SE of Barletta (94814 inhabitants)
91 Km SE of Cerignola (58396 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 ML 1.7 2019-08-21
07:31:12
40.69 16.69 1 2019-11-13
14:31:04
Bollettino Sismico Italiano INGV 73138681
Rev 100 ML 1.6 2019-08-21
07:31:12
40.68 16.69 3 2019-08-21
07:41:28
Sala Sismica INGV-Roma 71671191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-21 07:31:12 ± 0.16
Latitude 40.69 ± 0.01
Longitude 16.69 ± 0.01
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 73138681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1250
Semi-minor axis of confidence ellipse (meter) 1100
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 275
Circular confidence region, given by single value of horizontal uncertainty (meter) 1250
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 4
Number of defining phases 4
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.04676
Epicentral distance of station farthest from the epicenter (degree) 0.30217
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 73138681
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-10-08 14:52:38

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 71671191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-21 07:41:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NOCI.HHZ. 2019-08-21T07:31:19.21 0.3 undecidable manual P 72 0.3022 91 -0.21 71
IV.AMUR.HHZ. 2019-08-21T07:31:17.79 0.1 positive manual P 344 0.2221 91 0.14 97
IV.MIGL.HHZ. 2019-08-21T07:31:17.14 0.1 undecidable manual P 244 0.2059 91 -0.15 97
GE.MATE.HHZ. 2019-08-21T07:31:13.91 0.1 positive manual P 163 0.0468 95 0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.AMUR.HHN. ML:1.4 0.000174 0.2 AML other m 2019-08-21T07:31:23.72
IV.AMUR.HHE. ML:1.5 0.0002035 1.34 AML other m 2019-08-21T07:31:26.31
IV.MIGL.HHN. ML:2 0.000789 0.68 AML other m 2019-08-21T07:31:28.41
IV.NOCI.HHE. ML:1.7 0.0002135 1.24 AML other m 2019-08-21T07:31:29.02
IV.MIGL.HHE. ML:2 0.000692 0.5 AML other m 2019-08-21T07:31:29.97
IV.NOCI.HHN. ML:1.6 0.0001915 0.64 AML other m 2019-08-21T07:31:30.70
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