Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 31-07-2020 and time 23:58:15 (UTC) in region Costa Garganica (Foggia)

A magnitude ML 1.1 earthquake occured in region: Costa Garganica (Foggia), on

  • 31-07-2020 23:58:15 (UTC)
  • 01-08-2020 01:58:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.9060, 15.4650 at 9 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
Lesina FG 10 6410 6410
San Nicandro Garganico FG 11 15566 21976
Poggio Imperiale FG 12 2724 24700
Apricena FG 13 13328 38028

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km N of San Severo (53905 inhabitants)
49 Km NW of Manfredonia (57279 inhabitants)
50 Km N of Foggia (151991 inhabitants)
80 Km NW of Cerignola (58396 inhabitants)
94 Km NW of Barletta (94814 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 1.1 2020-07-31
23:58:15		 41.9058 15.4653 9 2020-11-19
12:36:59		 Bollettino Sismico Italiano INGV 82587701
Reviewed
Rev100 		ML 1.0 2020-07-31
23:58:15		 41.9072 15.4652 2 2020-08-01
00:09:28		 Sala Sismica INGV-Roma 81520311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-31 23:58:15 ± 0.13
Latitude 41.9058 ± 0.0054
Longitude 15.4653 ± 0.0109
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 82587701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 785
Semi-minor axis of confidence ellipse (meter) 481
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 81
Circular confidence region, given by single value of horizontal uncertainty (meter) 780.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.15918
Epicentral distance of station farthest from the epicenter (degree) 0.38311
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:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 82587701
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-09-17 14:04:38

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 81520311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-01 00:09:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MSAG.HNE. 2020-07-31T23:58:29.88 0.3 undecidable manual S 120 42.5241 50 0.3 68
IV.MELA.HHZ. 2020-07-31T23:58:27.84 0.3 undecidable manual S 232 35.742 50 0.1 72
IV.SGRT.HHZ. 2020-07-31T23:58:25.52 0.3 undecidable manual S 126 28.4493 107 -0.03 74
OT.OT05.EHZ. 2020-07-31T23:58:25.30 0.3 undecidable manual S 157 29.6481 106 -0.64 64
OT.OT06.EHZ. 2020-07-31T23:58:25.09 0.3 undecidable manual S 156 26.6511 108 0.14 73
OT.OT03.EHZ. 2020-07-31T23:58:24.90 0.3 undecidable manual S 145 26.3514 108 0.05 74
IV.TREM.HHZ. 2020-07-31T23:58:24.32 0.6 undecidable manual S 9 24.3534 110 0.12 49
OT.OT04.EHZ. 2020-07-31T23:58:23.77 0.3 undecidable manual S 155 22.755 111 0.1 74
IV.MSAG.HNE. 2020-07-31T23:58:23.37 0.3 undecidable manual P 120 42.5241 50 -0.15 71
IV.MELA.HHZ. 2020-07-31T23:58:22.38 0.3 undecidable manual P 232 35.742 50 -0.07 73
IV.APRC.HHZ. 2020-07-31T23:58:22.77 0.3 undecidable manual S 159 17.6712 116 0.71 63
IV.TREM.HHZ. 2020-07-31T23:58:20.43 0.1 undecidable manual P 9 24.3534 110 0.02 100
OT.OT06.EHZ. 2020-07-31T23:58:20.82 0.3 undecidable manual P 156 26.6511 108 -0.02 75
IV.SGRT.HHZ. 2020-07-31T23:58:20.97 0.3 undecidable manual P 126 28.4493 107 -0.22 71
OT.OT04.EHZ. 2020-07-31T23:58:20.14 0.3 undecidable manual P 155 22.755 111 0.04 75
OT.OT05.EHZ. 2020-07-31T23:58:20.65 0.3 undecidable manual P 157 29.6481 106 -0.76 61
OT.OT03.EHZ. 2020-07-31T23:58:20.47 0.6 undecidable manual P 145 26.3514 108 -0.31 47
IV.APRC.HHZ. 2020-07-31T23:58:19.59 0.3 undecidable manual P 159 17.6712 116 0.42 70
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.APRC.HNE. ML:1.3 0.00017044815 0.1792 AML other m 2020-07-31T23:58:22.87
IV.APRC.HHE. ML:1.3 0.00015727755 0.1792 AML other m 2020-07-31T23:58:22.96
IV.APRC.HHN. ML:1.3 0.00018708089999999999 1.8592 AML other m 2020-07-31T23:58:23.94
IV.TREM.HNE. ML:1.5 0.00018638335 0.8704 AML other m 2020-07-31T23:58:24.53
IV.TREM.HHE. ML:1.1 0.000082888395 0.5376 AML other m 2020-07-31T23:58:24.65
OT.OT05.EHN. ML:0.8 0.00003249936 0.2176 AML other m 2020-07-31T23:58:25.31
OT.OT05.EHE. ML:0.8 0.000036462715 0.4352 AML other m 2020-07-31T23:58:25.57
IV.SGRT.HHN. ML:0.6 0.00002113322 1.68 AML other m 2020-07-31T23:58:25.95
IV.MELA.HHE. ML:0.9 0.00003181904 0.8576 AML other m 2020-07-31T23:58:28.49
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