Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 03-04-2021 and time 22:20:59 (UTC) in region Costa Garganica (Foggia)

A magnitude ML 1.6 earthquake occured in region: Costa Garganica (Foggia), on

  • 03-04-2021 22:20:59 (UTC)
  • 04-04-2021 00:20:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.9740, 15.6370 at 10 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
San Nicandro Garganico FG 16 15566 15566
Isole Tremiti FG 20 469 16035
Cagnano Varano FG 20 7330 23365

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km NE of San Severo (53905 inhabitants)
45 Km NW of Manfredonia (57279 inhabitants)
57 Km N of Foggia (151991 inhabitants)
82 Km N of Cerignola (58396 inhabitants)
90 Km NW of Barletta (94814 inhabitants)
100 Km NW of Andria (100440 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 1.6 2021-04-03
22:20:59		 41.9745 15.6368 10 2021-07-12
16:55:17		 Bollettino Sismico Italiano INGV 92266801
Reviewed
Rev100 		ML 1.6 2021-04-03
22:20:59		 41.9813 15.6362 10 2021-04-03
22:29:07		 Sala Sismica INGV-Roma 88753651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-03 22:20:59 ± 0.11
Latitude 41.9745 ± 0.0108
Longitude 15.6368 ± 0.0097
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 92266801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1237
Semi-minor axis of confidence ellipse (meter) 639
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 19
Circular confidence region, given by single value of horizontal uncertainty (meter) 1240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.17537
Epicentral distance of station farthest from the epicenter (degree) 0.63222
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 88753651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-03 22:29:07

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 92266801
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-05 15:58:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MELA.HHZ. 2021-04-03T22:21:17.02 0.6 undecidable manual S 235 51.6039 50 0.79 38
OT.OT13.EHZ. 2021-04-03T22:21:14.55 0.6 undecidable manual S 103 46.0206 50 -0.19 48
OT.OT12.EHZ. 2021-04-03T22:21:14.56 0.6 undecidable manual S 149 44.1225 50 0.32 45
OT.OT07.EHE. 2021-04-03T22:21:13.38 0.6 undecidable manual S 170 39.7269 50 0.31 46
IV.CIGN.HHE. 2021-04-03T22:21:12.81 0.6 undecidable manual P 240 70.1742 50 0.72 38
IV.MSAG.HHZ. 2021-04-03T22:21:12.49 0.6 undecidable manual S 142 36.8298 50 0.2 47
OT.OT03.EHZ. 2021-04-03T22:21:10.39 0.6 undecidable manual S 178 29.1486 50 0.16 48
OT.OT05.EHZ. 2021-04-03T22:21:10.61 0.3 undecidable manual S 185 35.1426 50 -1.22 48
IV.APRC.HHZ. 2021-04-03T22:21:09.23 0.6 undecidable manual S 198 25.2525 111 0.19 50
IV.SGRT.HHZ. 2021-04-03T22:21:09.81 0.6 undecidable manual S 160 25.9518 110 0.57 46
IV.MELA.HHZ. 2021-04-03T22:21:09.72 0.6 undecidable manual P 235 51.6039 50 0.49 43
OT.OT12.EHZ. 2021-04-03T22:21:08.00 0.1 undecidable manual P 149 44.1225 50 -0.08 96
OT.OT13.EHZ. 2021-04-03T22:21:08.56 1.0 undecidable manual P 103 46.0206 50 0.2 23
OT.OT14.EHZ. 2021-04-03T22:21:08.90 0.6 undecidable manual S 111 23.8539 112 0.32 48
OT.OT07.EHE. 2021-04-03T22:21:07.25 0.1 undecidable manual P 170 39.7269 50 -0.16 95
IV.TREM.HNZ. 2021-04-03T22:21:07.15 0.3 undecidable manual S 328 19.4694 116 -0.04 75
OT.OT06.EHZ. 2021-04-03T22:21:06.24 0.1 undecidable manual P 186 32.2455 50 0 99
IV.MSAG.HHZ. 2021-04-03T22:21:06.87 0.3 undecidable manual P 142 36.8298 50 -0.08 73
OT.OT05.EHZ. 2021-04-03T22:21:06.08 0.3 undecidable manual P 185 35.1426 50 -0.61 64
OT.OT04.EHZ. 2021-04-03T22:21:05.55 0.3 undecidable manual P 189 28.6491 50 -0.15 72
IV.APRC.HHZ. 2021-04-03T22:21:05.12 0.1 undecidable manual P 198 25.2525 111 0.05 99
OT.OT03.EHZ. 2021-04-03T22:21:05.69 0.1 undecidable manual P 178 29.1486 50 -0.08 98
IV.SGRT.HHZ. 2021-04-03T22:21:05.32 0.1 undecidable manual P 160 25.9518 110 0.13 99
OT.OT14.EHZ. 2021-04-03T22:21:04.90 0.1 undecidable manual P 111 23.8539 112 0.09 100
IV.TREM.HNZ. 2021-04-03T22:21:03.84 0.3 undecidable manual P 328 19.4694 116 -0.16 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SGRT.HHE. ML:1.6 0.0002455 1.12 AML other m 2021-04-03T22:21:10.07
OT.OT05.EHE. ML:1.7 0.0001945 0.08 AML other m 2021-04-03T22:21:10.85
OT.OT05.EHN. ML:1.5 0.00014050000000000003 0.94 AML other m 2021-04-03T22:21:11.24
IV.SGRT.HHN. ML:1.4 0.0001495 0.76 AML other m 2021-04-03T22:21:11.24
IV.MSAG.HHE. ML:1.0 0.000036973715 0.2304 AML other m 2021-04-03T22:21:12.86
IV.MSAG.HHN. ML:1.3 0.000078346885 0.2432 AML other m 2021-04-03T22:21:13.03
IV.MSAG.HNN. ML:1.7 0.00018467435 0.256 AML other m 2021-04-03T22:21:13.03
OT.OT12.EHE. ML:1.2 0.000051156654999999994 0.2944 AML other m 2021-04-03T22:21:14.75
OT.OT12.EHN. ML:1.6 0.00011728485 0.32 AML other m 2021-04-03T22:21:15.37
OT.OT13.EHE. ML:2.0 0.00026715475 0.2688 AML other m 2021-04-03T22:21:16.22
OT.OT13.EHN. ML:2.1 0.0003607744 0.3072 AML other m 2021-04-03T22:21:16.27
IV.MSAG.HNE. ML:1.6 0.00013700529 0.768 AML other m 2021-04-03T22:21:17.00
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