Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 1.2 on date 27-10-2021 and time 10:10:21 (Italy) in region 13 km SE Rignano Garganico (FG)

A magnitude ML 1.2 (quarry blast) earthquake occured in region: 13 km SE Rignano Garganico (FG), on

  • 27-10-2021 08:10:21 (UTC)
  • 27-10-2021 10:10:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.5980, 15.6950 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.

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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
Rignano Garganico FG 13 2117 2117
San Giovanni Rotondo FG 13 27184 29301
San Marco in Lamis FG 14 13831 43132
Manfredonia FG 19 57279 100411
Foggia FG 20 151991 252402

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km W of Manfredonia (57279 inhabitants)
20 Km NE of Foggia (151991 inhabitants)
28 Km E of San Severo (53905 inhabitants)
41 Km NW of Cerignola (58396 inhabitants)
58 Km NW of Barletta (94814 inhabitants)
65 Km NW of Andria (100440 inhabitants)
70 Km NW of Trani (56217 inhabitants)
78 Km NW of Bisceglie (55422 inhabitants)
87 Km NW of Molfetta (59874 inhabitants)
92 Km NE of Benevento (60091 inhabitants)
100 Km NW 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 		ML 1.2 2021-10-27
08:10:21		 41.5978 15.6953 1 2022-03-30
13:04:38		 Bollettino Sismico Italiano INGV 101077681
Reviewed
Rev100 		ML 1.2 2021-10-27
08:10:21		 41.5992 15.7005 3 2021-10-27
08:18:35		 Sala Sismica INGV-Roma 97017341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-27 08:10:21 ± 0.24
Latitude 41.5978 ± 0.0144
Longitude 15.6953 ± 0.0060
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 101077681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1650
Semi-minor axis of confidence ellipse (meter) 440
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 10
Circular confidence region, given by single value of horizontal uncertainty (meter) 1650.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 234
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.02968
Epicentral distance of station farthest from the epicenter (degree) 0.19695
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 101077681
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-17 10:13:54

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 97017341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-27 08:18:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MSAG.HHZ. 2021-10-27T08:10:25.59 0.1 undecidable manual P 54 21.867 91 -0.09 98
IV.APRC.HHZ. 2021-10-27T08:10:25.39 0.1 undecidable manual P 325 21.7671 91 -0.28 94
IV.SGRT.HHZ. 2021-10-27T08:10:24.80 0.3 undecidable manual P 13 17.871 92 -0.09 74
OT.OT06.EHZ. 2021-10-27T08:10:24.07 0.3 undecidable manual P 319 12.876 92 0.18 73
OT.OT04.EHZ. 2021-10-27T08:10:24.57 0.3 undecidable manual P 325 16.4724 92 -0.05 75
OT.OT12.EHZ. 2021-10-27T08:10:24.93 0.3 undecidable manual P 78 18.0708 92 0.01 75
OT.OT03.EHZ. 2021-10-27T08:10:24.11 0.3 undecidable manual P 343 13.2756 92 0.14 74
OT.OT05.EHZ. 2021-10-27T08:10:23.45 0.1 undecidable manual P 312 10.2786 93 0.08 100
OT.OT07.EHZ. 2021-10-27T08:10:22.12 0.1 undecidable manual P 37 3.2967 99 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OT.OT05.EHN. ML:1.4 0.0005105 1.18 AML other m 2021-10-27T08:10:27.71
OT.OT05.EHE. ML:-0.1 0.0000174 0.26 AML other m 2021-10-27T08:10:28.52
IV.SGRT.HHE. ML:1.3 0.00019166365000000002 0.4608 AML other m 2021-10-27T08:10:30.39
IV.MSAG.HHE. ML:0.9 0.0000620345 0.3456 AML other m 2021-10-27T08:10:30.73
IV.MSAG.HNE. ML:1.3 0.0001480886 0.3456 AML other m 2021-10-27T08:10:30.73
IV.SGRT.HHN. ML:1.3 0.00020846835 0.4608 AML other m 2021-10-27T08:10:30.92
OT.OT12.EHN. ML:1.0 0.000106089925 0.4608 AML other m 2021-10-27T08:10:31.81
IV.MSAG.HHN. ML:1.2 0.00011344999999999999 1.66 AML other m 2021-10-27T08:10:31.90
IV.MSAG.HNN. ML:1.6 0.00027105985 1.6608 AML other m 2021-10-27T08:10:31.90
OT.OT12.EHE. ML:0.7 0.00005122172499999999 0.3008 AML other m 2021-10-27T08:10:33.23
IV.APRC.HHN. ML:1.4 0.00019484955 0.4032 AML other m 2021-10-27T08:10:33.47
IV.APRC.HNE. ML:1.4 0.00018583445 0.4736 AML other m 2021-10-27T08:10:35.08
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