Earthquake (quarry blast) with magnitude of ML 1.7 on date 26-05-2021 and time 10:12:20 (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

  • 26-05-2021 08:12:20 (UTC)
  • 26-05-2021 10:12:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.676, 16.696 at 6 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 11 15290 75726
Ginosa TA 12 22632 98358
Montescaglioso MT 14 9942 108300
Santeramo in Colle BA 14 26734 135034

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km E of Matera (60436 inhabitants)
21 Km SE of Altamura (70396 inhabitants)
48 Km S of Bitonto (55540 inhabitants)
51 Km W of Taranto (201100 inhabitants)
52 Km S of Bari (326344 inhabitants)
59 Km S of Molfetta (59874 inhabitants)
65 Km S of Bisceglie (55422 inhabitants)
70 Km SE of Andria (100440 inhabitants)
71 Km SE of Trani (56217 inhabitants)
75 Km E of Potenza (67122 inhabitants)
80 Km SE of Barletta (94814 inhabitants)
93 Km SE of Cerignola (58396 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.7 2021-05-26
08:12:20
40.6763 16.6957 6 2021-05-26
08:17:37
Sala Sismica INGV-Roma 90505171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-26 08:12:20 ± 0.13
Latitude 40.6763 ± 0.0054
Longitude 16.6957 ± 0.0059
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type quarry blast
Origin ID 90505171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 587
Semi-minor axis of confidence ellipse (meter) 247
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 335
Circular confidence region, given by single value of horizontal uncertainty (meter) 590
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.35523
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 90505171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-26 08:17:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GIZZ.HHZ. 2021-05-26T08:13:06.64 3.0 undecidable manual Sn -0.35 0
IV.IMTC.HHZ. 2021-05-26T08:13:02.52 3.0 positive manual Pg 7.77 0
IV.LPEL.HHZ. 2021-05-26T08:12:58.17 3.0 undecidable manual Pn 0.4 0
IV.JOPP.HHZ. 2021-05-26T08:12:50.89 3.0 positive manual Pg 0.43 0
AC.VLO.HHZ. 2021-05-26T08:12:47.06 3.0 undecidable manual Pg -0.03 0
IV.CRAC.EHE. 2021-05-26T08:12:34.80 0.3 undecidable manual S 214 0.3552 99 0.34 66
OT.MASS.HHE. 2021-05-26T08:12:34.23 0.1 undecidable manual S 97 0.3426 99 0.24 91
IV.NOCI.HHE. 2021-05-26T08:12:32.73 0.3 undecidable manual S 68 0.3013 100 0.32 67
IV.AMUR.HHZ. 2021-05-26T08:12:30.38 0.3 undecidable manual S 343 0.241 103 0.25 69
IV.MIGL.HHZ. 2021-05-26T08:12:29.25 0.3 undecidable manual S 250 0.2059 105 0.41 67
OT.MASS.HHE. 2021-05-26T08:12:28.09 0.1 undecidable manual P 97 0.3426 99 -0.25 91
IV.CRAC.EHE. 2021-05-26T08:12:28.31 0.1 undecidable manual P 214 0.3552 99 -0.3 89
IV.NOCI.HHE. 2021-05-26T08:12:27.31 0.3 undecidable manual P 68 0.3013 100 -0.11 70
IV.MIGL.HHZ. 2021-05-26T08:12:25.23 0.1 undecidable manual P 250 0.2059 105 -0.13 95
IV.AMUR.HHZ. 2021-05-26T08:12:25.83 0.1 undecidable manual P 343 0.241 103 -0.28 92
GE.MATE.HHZ. 2021-05-26T08:12:22.92 0.1 undecidable manual S 166 0.0279 153 -0.09 99
GE.MATE.HHZ. 2021-05-26T08:12:21.94 0.1 positive manual P 166 0.0279 153 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GE.MATE.HHN. ML:2.8 0.01185 0.78 AML other m 2021-05-26T08:12:23.45
GE.MATE.HHE. ML:2.4 0.005185 0.22 AML other m 2021-05-26T08:12:23.94
IV.AMUR.HHE. ML:1.5 0.000179 1.24 AML other m 2021-05-26T08:12:30.78
IV.AMUR.HHN. ML:1.4 0.0001615 0.52 AML other m 2021-05-26T08:12:33.71
IV.MIGL.HHN. ML:2 0.0006765 0.6 AML other m 2021-05-26T08:12:36.52
IV.MIGL.HHE. ML:1.9 0.0006205 1.24 AML other m 2021-05-26T08:12:38.18
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