Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 28-11-2020 and time 04:10:04 (UTC) in region 4 km S Grottole (MT)

A magnitude ML 1.5 earthquake occured in region: 4 km S Grottole (MT), on

  • 28-11-2020 04:10:04 (UTC)
  • 28-11-2020 05:10:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.5660, 16.3720 at 33 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
Grottole MT 4 2208 2208
Salandra MT 6 2829 5037
Grassano MT 11 5189 10226
Ferrandina MT 11 8853 19079
Miglionico MT 11 2510 21589
Garaguso MT 12 1073 22662
San Mauro Forte MT 13 1552 24214
Calciano MT 16 777 24991
Pomarico MT 16 4145 29136
Oliveto Lucano MT 16 450 29586
Accettura MT 20 1856 31442

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km SW of Matera (60436 inhabitants)
33 Km SW of Altamura (70396 inhabitants)
49 Km E of Potenza (67122 inhabitants)
66 Km SW of Bitonto (55540 inhabitants)
74 Km W of Taranto (201100 inhabitants)
74 Km S of Molfetta (59874 inhabitants)
74 Km S of Andria (100440 inhabitants)
75 Km SW of Bari (326344 inhabitants)
76 Km S of Bisceglie (55422 inhabitants)
79 Km S of Trani (56217 inhabitants)
84 Km S of Barletta (94814 inhabitants)
87 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
Bulletin
Rev1000 		ML 1.5 2020-11-28
04:10:04		 40.5662 16.3718 33 2021-02-26
14:56:17		 Bollettino Sismico Italiano INGV 86658121
Reviewed
Rev100 		ML 1.4 2020-11-28
04:10:05		 40.5617 16.3852 26 2020-11-28
04:27:31		 Sala Sismica INGV-Roma 85060611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-28 04:10:04 ± 0.21
Latitude 40.5662 ± 0.0072
Longitude 16.3718 ± 0.0095
Depth (km) 33 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86658121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 817
Semi-minor axis of confidence ellipse (meter) 394
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 349
Circular confidence region, given by single value of horizontal uncertainty (meter) 820.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.06475
Epicentral distance of station farthest from the epicenter (degree) 0.58996
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.5
Num. used stations 6
Type of magnitude ML
Reference to an origin 86658121
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-28 17:06:22

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 85060611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-28 04:27:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NOCI.HHZ. 2020-11-28T04:10:25.96 0.6 undecidable manual S 67 63.2922 113 0.85 37
OT.MASS.HHN. 2020-11-28T04:10:25.90 0.6 undecidable manual S 83 65.49 112 0.25 45
IV.PALZ.HHZ. 2020-11-28T04:10:23.42 0.6 undecidable manual S 321 54.4011 116 0.48 44
IV.SIRI.HNE. 2020-11-28T04:10:23.94 0.6 undecidable manual S 225 60.2952 114 -0.43 44
IV.MRVN.HHZ. 2020-11-28T04:10:22.75 0.6 undecidable manual S 345 56.7987 115 -0.79 39
IV.MCEL.HHN. 2020-11-28T04:10:22.79 0.6 undecidable manual S 241 55.1004 116 -0.31 45
IV.SCHR.EHN. 2020-11-28T04:10:21.54 0.6 undecidable manual S 212 47.7189 120 0.16 48
IV.ACER.HHZ. 2020-11-28T04:10:20.70 0.6 undecidable manual S 304 43.623 122 0.27 47
IV.AMUR.HHZ. 2020-11-28T04:10:19.82 0.6 undecidable manual S 27 42.5241 123 -0.38 46
IV.PTRP.HHN. 2020-11-28T04:10:18.00 0.6 undecidable manual S 259 26.6511 137 1.07 36
IV.NOCI.HHZ. 2020-11-28T04:10:17.09 0.6 undecidable manual P 67 63.2922 113 0.65 40
OT.MASS.HHN. 2020-11-28T04:10:17.35 0.6 undecidable manual P 83 65.49 112 0.6 41
IV.CRAC.EHZ. 2020-11-28T04:10:16.80 0.6 undecidable manual S 165 21.1677 144 0.79 41
GE.MATE.HHE. 2020-11-28T04:10:16.87 0.6 undecidable manual S 72 29.4483 134 -0.59 45
IV.PALZ.HHZ. 2020-11-28T04:10:15.51 0.3 undecidable manual P 321 54.4011 116 0.33 68
IV.SIRI.HNE. 2020-11-28T04:10:15.93 0.3 undecidable manual P 225 60.2952 114 -0.08 71
IV.MRVN.HHZ. 2020-11-28T04:10:15.37 0.3 undecidable manual P 345 56.7987 115 -0.16 70
IV.MCEL.HHN. 2020-11-28T04:10:15.18 0.3 undecidable manual P 241 55.1004 116 -0.1 71
IV.MIGL.HHZ. 2020-11-28T04:10:13.97 0.6 undecidable manual S 54 7.1928 166 -0.46 48
IV.AMUR.HHZ. 2020-11-28T04:10:13.56 0.1 undecidable manual P 27 42.5241 123 -0.04 99
IV.SCHR.EHN. 2020-11-28T04:10:13.55 0.3 undecidable manual P 212 47.7189 120 -0.74 60
IV.ACER.HHZ. 2020-11-28T04:10:13.61 0.3 undecidable manual P 304 43.623 122 -0.13 72
IV.PTRP.HHN. 2020-11-28T04:10:11.88 0.1 undecidable manual P 259 26.6511 137 0.16 99
IV.CRAC.EHZ. 2020-11-28T04:10:11.33 0.1 undecidable manual P 165 21.1677 144 0.15 100
GE.MATE.HHE. 2020-11-28T04:10:11.87 0.1 undecidable manual P 72 29.4483 134 -0.15 99
IV.MIGL.HHZ. 2020-11-28T04:10:09.92 0.1 undecidable manual P 54 7.1928 166 -0.35 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MIGL.HHE. ML:2.0 0.00046699999999999997 0.26 AML other m 2020-11-28T04:10:14.03
IV.MIGL.HHN. ML:2.2 0.0008355 0.18 AML other m 2020-11-28T04:10:14.08
IV.AMUR.HHN. ML:1.0 0.000025399999999999997 0.52 AML other m 2020-11-28T04:10:20.51
IV.AMUR.HHE. ML:0.9 0.000021499999999999997 0.44 AML other m 2020-11-28T04:10:21.86
IV.NOCI.HHE. ML:1.4 0.0000448 0.32 AML other m 2020-11-28T04:10:27.25
IV.NOCI.HHN. ML:1.5 0.00004905 0.48 AML other m 2020-11-28T04:10:27.44
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