Earthquake with magnitude of ML 1.6 on date 31-08-2021 and time 11:37:00 (Italy) in region 3 km N Ferrandina (MT)

A magnitude ML 1.6 earthquake occured in region: 3 km N Ferrandina (MT), on

  • 31-08-2021 09:37:00 (UTC)
  • 31-08-2021 11:37:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.52, 16.458 at 36 km depth.

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

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
Ferrandina MT 3 8853 8853
Miglionico MT 6 2510 11363
Pomarico MT 8 4145 15508
Grottole MT 12 2208 17716
Salandra MT 12 2829 20545
Pisticci MT 17 17768 38313
San Mauro Forte MT 18 1552 39865
Montescaglioso MT 18 9942 49807
Craco MT 18 745 50552
Grassano MT 19 5189 55741
Garaguso MT 20 1073 56814

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km SW of Matera (60436 inhabitants)
35 Km S of Altamura (70396 inhabitants)
57 Km E of Potenza (67122 inhabitants)
66 Km W of Taranto (201100 inhabitants)
69 Km S of Bitonto (55540 inhabitants)
76 Km SW of Bari (326344 inhabitants)
77 Km S of Molfetta (59874 inhabitants)
80 Km S of Andria (100440 inhabitants)
81 Km S of Bisceglie (55422 inhabitants)
84 Km S of Trani (56217 inhabitants)
90 Km S of Barletta (94814 inhabitants)
95 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 1.6 2021-08-31
09:37:00
40.52 16.4585 36 2021-08-31
09:45:34
Sala Sismica INGV-Roma 94861221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-31 09:37:00 ± 0.16
Latitude 40.5200 ± 0.0081
Longitude 16.4585 ± 0.0130
Depth (km) 36 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94861221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1030
Semi-minor axis of confidence ellipse (meter) 713
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 113
Circular confidence region, given by single value of horizontal uncertainty (meter) 1030
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.90562
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 94861221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-31 09:45:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SERS.HHZ. 2021-08-31T09:37:42.64 3.0 undecidable manual Sn -1.93 0
IV.SGRT.HHZ. 2021-08-31T09:37:39.98 3.0 undecidable manual Sn -0.65 0
IX.SCL3.EHZ.02 2021-08-31T09:37:23.92 3.0 undecidable manual S -1.94 0
OT.TAR1.HHZ. 2021-08-31T09:37:22.44 0.1 undecidable manual S 89 0.6277 113 -0.57 80
IV.MRVN.HHE. 2021-08-31T09:37:20.71 0.1 undecidable manual S 340 0.5756 115 -0.9 70
IV.GRIS.EHZ. 2021-08-31T09:37:17.87 0.1 undecidable manual P 211 0.9056 54 0.39 81
IV.SCHR.EHZ. 2021-08-31T09:37:17.48 0.3 undecidable manual S 222 0.4335 123 -0.42 66
IV.AMUR.HHZ. 2021-08-31T09:37:17.55 0.1 undecidable manual S 16 0.402 125 0.41 88
IV.MGR.HHZ. 2021-08-31T09:37:15.87 3.0 positive manual P 0.13 0
OT.TAR1.HHZ. 2021-08-31T09:37:13.60 0.1 undecidable manual P 89 0.6277 113 0.06 91
GE.MATE.HHZ. 2021-08-31T09:37:13.05 0.1 undecidable manual S 55 0.2266 142 -0.28 94
IV.PALZ.HHZ. 2021-08-31T09:37:13.36 3.0 negative manual P 0.74 0
IV.MTSN.HHZ. 2021-08-31T09:37:12.55 3.0 negative manual P -0.53 0
IV.CRAC.EHZ. 2021-08-31T09:37:12.07 0.1 undecidable manual S 187 0.1394 155 0.1 97
IV.SIRI.HHZ. 2021-08-31T09:37:12.27 0.6 negative manual P 233 0.563 116 -0.26 44
IV.PZUN.HHZ. 2021-08-31T09:37:12.36 3.0 positive manual P 0.5 0
IV.MCEL.HHZ. 2021-08-31T09:37:12.07 3.0 undecidable manual P -0.2 0
IV.MRVN.HHE. 2021-08-31T09:37:12.57 0.1 undecidable manual P 340 0.5756 115 -0.16 89
IV.NOCI.HHZ. 2021-08-31T09:37:12.23 0.1 undecidable manual P 59 0.5324 117 0.17 90
IV.MIGL.HHZ. 2021-08-31T09:37:11.85 0.1 undecidable manual S 351 0.0854 164 0.45 91
IV.SCHR.EHZ. 2021-08-31T09:37:10.04 1.0 positive manual P 222 0.4335 123 -0.55 21
IV.AMUR.HHZ. 2021-08-31T09:37:10.47 0.1 undecidable manual P 16 0.402 125 0.32 90
IV.PTRP.HHZ. 2021-08-31T09:37:09.06 0.1 undecidable manual P 270 0.3022 134 0.25 93
GE.MATE.HHZ. 2021-08-31T09:37:08.00 0.1 undecidable manual P 55 0.2266 142 0.05 98
IV.CRAC.EHZ. 2021-08-31T09:37:07.06 0.1 positive manual P 187 0.1394 155 -0.11 99
IV.MIGL.HHZ. 2021-08-31T09:37:06.90 0.1 undecidable manual P 351 0.0854 164 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRAC.EHN. ML:1.9 0.0002865 0.58 AML other m 2021-08-31T09:37:07.65
IV.MIGL.HHN. ML:2.6 0.00165 0.34 AML other m 2021-08-31T09:37:12.01
IV.MIGL.HHE. ML:2.4 0.0009865 0.16 AML other m 2021-08-31T09:37:12.24
IV.CRAC.EHE. ML:2.1 0.000456 0.64 AML other m 2021-08-31T09:37:13.56
GE.MATE.HHN. ML:1.5 0.000109 0.78 AML other m 2021-08-31T09:37:13.87
GE.MATE.HHE. ML:1.4 7.775E-5 0.98 AML other m 2021-08-31T09:37:14.73
IV.AMUR.HNN. ML:2.1 0.000256 1.38 AML other m 2021-08-31T09:37:17.81
IV.AMUR.HHN. ML:2.1 0.0002865 0.2 AML other m 2021-08-31T09:37:17.81
IV.AMUR.HNE. ML:2.1 0.000255 0.26 AML other m 2021-08-31T09:37:17.74
IV.SCHR.EHN. ML:1.5 6.225E-5 1.08 AML other m 2021-08-31T09:37:18.05
IV.SCHR.EHE. ML:1.5 6.48E-5 0.26 AML other m 2021-08-31T09:37:18.07
IV.AMUR.HHE. ML:1.7 0.0001169 1.48 AML other m 2021-08-31T09:37:18.06
IV.MCEL.HHE. ML:1.5 5.14E-5 1.38 AML other m 2021-08-31T09:37:21.90
IV.MCEL.HHN. ML:1.7 9.06E-5 0.38 AML other m 2021-08-31T09:37:21.26
IV.SIRI.HHE. ML:1.2 2.3E-5 0.48 AML other m 2021-08-31T09:37:21.51
IV.MTSN.HHE. ML:1.3 3.095E-5 1.72 AML other m 2021-08-31T09:37:21.00
IV.MTSN.HHN. ML:1.4 3.495E-5 0.56 AML other m 2021-08-31T09:37:22.19
IV.NOCI.HHN. ML:1.7 8.855E-5 0.34 AML other m 2021-08-31T09:37:22.84
IV.NOCI.HHE. ML:1.6 6.94E-5 0.44 AML other m 2021-08-31T09:37:24.25
IV.SIRI.HHN. ML:1.4 4.13E-5 0.72 AML other m 2021-08-31T09:37:24.45
IV.MGR.HHE. ML:1.4 2.355E-5 0.76 AML other m 2021-08-31T09:37:28.32
IV.MGR.HHN. ML:1.4 2.33E-5 1.14 AML other m 2021-08-31T09:37:30.21
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