Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 1.5 on date 26-05-2023 and time 09:48:02 (UTC) in region 8 km SE Rignano Garganico (FG)

A magnitude ML 1.5 (quarry blast) earthquake occured in region: 8 km SE Rignano Garganico (FG), on

  • 26-05-2023 09:48:02 (UTC)
  • 26-05-2023 11:48:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.6220, 15.6450 at 8 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.

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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 8 2117 2117
San Marco in Lamis FG 10 13831 15948
San Giovanni Rotondo FG 12 27184 43132
Foggia FG 20 151991 195123

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NE of Foggia (151991 inhabitants)
23 Km W of Manfredonia (57279 inhabitants)
23 Km E of San Severo (53905 inhabitants)
45 Km NW of Cerignola (58396 inhabitants)
63 Km NW of Barletta (94814 inhabitants)
70 Km NW of Andria (100440 inhabitants)
75 Km NW of Trani (56217 inhabitants)
83 Km NW of Bisceglie (55422 inhabitants)
90 Km NE of Benevento (60091 inhabitants)
92 Km NW of Molfetta (59874 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
Reviewed
Rev100 		ML 1.5 2023-05-26
09:48:02		 41.6222 15.6453 8 2023-05-26
09:56:30		 Sala Sismica INGV-Roma 117737831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-26 09:48:02 ± 0.12
Latitude 41.6222 ± 0.0045
Longitude 15.6453 ± 0.0036
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type quarry blast
Origin ID 117737831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 532
Semi-minor axis of confidence ellipse (meter) 125
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 27
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 228
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.04856
Epicentral distance of station farthest from the epicenter (degree) 0.19605
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 117737831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-26 09:56:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OT.OT12.EHZ. 2023-05-26T09:48:10.52 0.3 undecidable manual S 87 21.7671 110 -0.18 71
IV.APRC.HHZ. 2023-05-26T09:48:09.32 0.3 undecidable manual S 331 17.2716 115 0.08 73
IV.SGRT.HHZ. 2023-05-26T09:48:09.07 0.3 undecidable manual S 29 16.7721 116 -0.03 74
OT.OT12.EHZ. 2023-05-26T09:48:07.10 0.1 undecidable manual P 87 21.7671 110 -0.19 94
OT.OT04.EHE. 2023-05-26T09:48:07.68 0.3 undecidable manual S 334 12.0768 124 0.01 75
OT.OT03.EHE. 2023-05-26T09:48:06.99 0.3 undecidable manual S 2 9.9789 129 -0.1 74
IV.SGRT.HHZ. 2023-05-26T09:48:06.53 0.1 positive manual P 29 16.7721 116 0.16 96
OT.OT06.EHE. 2023-05-26T09:48:06.68 0.3 undecidable manual S 329 8.1807 135 0.05 75
OT.OT07.EHE. 2023-05-26T09:48:06.34 0.3 undecidable manual S 91 6.0939 143 0.19 73
IV.APRC.HHZ. 2023-05-26T09:48:06.40 0.1 positive manual P 331 17.2716 115 -0.05 98
OT.OT04.EHE. 2023-05-26T09:48:05.57 0.1 positive manual P 334 12.0768 124 0.03 99
OT.OT05.EHZ. 2023-05-26T09:48:05.78 0.3 undecidable manual S 319 5.3946 146 -0.23 72
OT.OT03.EHE. 2023-05-26T09:48:05.31 0.1 positive manual P 2 9.9789 129 0.1 98
OT.OT05.EHZ. 2023-05-26T09:48:04.48 0.1 positive manual P 319 5.3946 146 -0.1 99
OT.OT06.EHE. 2023-05-26T09:48:04.96 0.1 positive manual P 329 8.1807 135 0.02 100
OT.OT07.EHE. 2023-05-26T09:48:04.85 0.1 positive manual P 91 6.0939 143 0.19 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OT.OT05.EHE. ML:0.1 0.00002075 0.36 AML other m 2023-05-26T09:48:06.45
OT.OT05.EHN. ML:2.4 0.00418 1.62 AML other m 2023-05-26T09:48:07.87
IV.SGRT.HHN. ML:1.4 0.000262 0.2 AML other m 2023-05-26T09:48:09.44
IV.SGRT.HHE. ML:1.5 0.0003035 0.22 AML other m 2023-05-26T09:48:09.54
IV.APRC.HHN. ML:1.9 0.000766 0.32 AML other m 2023-05-26T09:48:12.16
IV.APRC.HHE. ML:1.8 0.0005915 0.82 AML other m 2023-05-26T09:48:12.18
OT.OT12.EHN. ML:1.2 0.00010705 0.32 AML other m 2023-05-26T09:48:15.39
OT.OT12.EHE. ML:1.1 0.0000813 0.4 AML other m 2023-05-26T09:48:16.52
IV.APRC.HNE. ML:1.7 0.00044683845 0.3136 AML other m 2023-05-26T09:48:12.18
IV.SGRT.HNE. ML:1.5 0.00029350565 0.2176 AML other m 2023-05-26T09:48:09.54
IV.SGRT.HNN. ML:1.4 0.00023263595 0.2048 AML other m 2023-05-26T09:48:09.44
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