Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 04-05-2021 and time 01:59:23 (UTC) in region Costa Garganica (Foggia)

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

  • 04-05-2021 01:59:23 (UTC)
  • 04-05-2021 03:59:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.0290, 15.7430 at 16 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
Rodi Garganico FG 16 3693 3693
Ischitella FG 19 4432 8125

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km NW of Manfredonia (57279 inhabitants)
48 Km NE of San Severo (53905 inhabitants)
65 Km N of Foggia (151991 inhabitants)
86 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 2021-05-04
01:59:23		 42.0288 15.743 16 2021-12-29
11:11:59		 Bollettino Sismico Italiano INGV 89961811
Reviewed
Rev100 		ML 1.7 2021-05-04
01:59:22		 42.03 15.7428 18 2021-05-04
02:05:22		 Sala Sismica INGV-Roma 89753641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-04 01:59:23 ± 0.14
Latitude 42.0288 ± 0.0063
Longitude 15.7430 ± 0.0061
Depth (km) 16 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89961811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 628
Semi-minor axis of confidence ellipse (meter) 422
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 206
Circular confidence region, given by single value of horizontal uncertainty (meter) 630.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 175
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.17986
Epicentral distance of station farthest from the epicenter (degree) 1.29322
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 89961811
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-02 09:10:29

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 89753641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-04 02:05:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.AMUR.HHZ. 2021-05-04T01:59:47.55 0.3 undecidable manual P 150 143.5452 92 0.95 45
IV.MRVN.HHZ. 2021-05-04T01:59:41.96 0.3 undecidable manual P 161 113.7972 93 -0.05 63
OT.OT12.EHZ. 2021-05-04T01:59:37.48 0.6 undecidable manual S 163 46.1205 99 -0.43 44
OT.OT13.EHZ. 2021-05-04T01:59:36.19 0.6 undecidable manual S 114 39.5271 101 0 49
IV.APRC.HHZ. 2021-05-04T01:59:35.05 0.6 undecidable manual S 209 34.3434 104 0.22 49
OT.OT03.EHE. 2021-05-04T01:59:35.31 0.3 undecidable manual S 192 35.9418 103 0.06 74
OT.OT04.EHE. 2021-05-04T01:59:35.52 0.6 undecidable manual S 201 36.8298 102 0.04 49
IV.MSAG.HHZ. 2021-05-04T01:59:35.79 0.6 undecidable manual S 159 37.7289 102 0.07 50
IV.MELA.HHZ. 2021-05-04T01:59:34.45 0.1 undecidable manual P 235 62.1933 96 0.36 89
IV.SGRT.HHZ. 2021-05-04T01:59:33.63 0.6 undecidable manual S 180 30.4473 106 -0.19 48
IV.TREM.HHZ. 2021-05-04T01:59:31.66 0.6 undecidable manual S 299 21.867 115 -0.01 51
OT.OT14.EHZ. 2021-05-04T01:59:31.47 0.6 undecidable manual S 137 19.9689 118 0.25 49
OT.OT12.EHZ. 2021-05-04T01:59:31.44 0.1 undecidable manual P 163 46.1205 99 -0.19 94
OT.OT07.EHE. 2021-05-04T01:59:31.27 0.1 undecidable manual P 182 45.2214 99 -0.22 93
OT.OT03.EHE. 2021-05-04T01:59:30.03 0.1 undecidable manual P 192 35.9418 103 -0.06 98
OT.OT04.EHE. 2021-05-04T01:59:30.03 0.1 undecidable manual P 201 36.8298 102 -0.19 95
IV.MSAG.HHZ. 2021-05-04T01:59:30.32 0.1 undecidable manual P 159 37.7289 102 -0.04 98
OT.OT13.EHZ. 2021-05-04T01:59:30.53 0.1 undecidable manual P 114 39.5271 101 -0.1 97
OT.OT06.EHZ. 2021-05-04T01:59:30.76 0.3 undecidable manual P 198 40.0266 101 0.06 74
OT.OT05.EHZ. 2021-05-04T01:59:30.98 0.3 undecidable manual P 196 42.624 100 -0.12 72
IV.SGRT.HHZ. 2021-05-04T01:59:29.24 0.1 undecidable manual P 180 30.4473 106 -0.02 99
IV.APRC.HHZ. 2021-05-04T01:59:29.94 0.1 undecidable manual P 209 34.3434 104 0.09 99
IV.TREM.HHZ. 2021-05-04T01:59:27.81 0.1 undecidable manual P 299 21.867 115 -0.21 98
OT.OT14.EHZ. 2021-05-04T01:59:27.90 0.1 negative manual P 137 19.9689 118 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TREM.HHE. ML:2.0 0.0005525 1.44 AML other m 2021-05-04T01:59:32.86
IV.TREM.HHN. ML:1.9 0.00043000000000000004 0.26 AML other m 2021-05-04T01:59:32.17
IV.SGRT.HHN. ML:1.4 0.000118 1.44 AML other m 2021-05-04T01:59:34.10
IV.SGRT.HHE. ML:1.5 0.000124 1.1 AML other m 2021-05-04T01:59:34.33
IV.APRC.HHE. ML:1.4 0.00008265 0.88 AML other m 2021-05-04T01:59:35.52
IV.MSAG.HHE. ML:1.1 0.0000461 1.4 AML other m 2021-05-04T01:59:36.13
IV.MSAG.HHN. ML:1.5 0.00010425000000000001 0.86 AML other m 2021-05-04T01:59:38.52
IV.APRC.HHN. ML:1.5 0.0001305 1.42 AML other m 2021-05-04T01:59:38.14
OT.OT13.EHE. ML:1.8 0.00021799999999999999 1.7 AML other m 2021-05-04T01:59:39.03
OT.OT13.EHN. ML:2.0 0.000367 1.02 AML other m 2021-05-04T01:59:39.94
OT.OT12.EHE. ML:1.4 0.00007505000000000001 0.52 AML other m 2021-05-04T01:59:39.72
OT.OT12.EHN. ML:1.8 0.0001605 1.66 AML other m 2021-05-04T01:59:40.91
IV.MELA.HHN. ML:2.1 0.000235 0.22 AML other m 2021-05-04T01:59:45.82
IV.MELA.HHE. ML:2.1 0.000265 0.18 AML other m 2021-05-04T01:59:45.85
IV.MRVN.HHE. ML:1.6 0.00002765 0.86 AML other m 2021-05-04T01:59:59.98
IV.MRVN.HHN. ML:1.4 0.00002095 0.86 AML other m 2021-05-04T02:00:00.33
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