Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 26-08-2021 and time 01:34:49 (Italy) in region 4 km N Lesina (FG)

A magnitude ML 1.4 earthquake occured in region: 4 km N Lesina (FG), on

  • 25-08-2021 23:34:49 (UTC)
  • 26-08-2021 01:34:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.9040, 15.3560 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
Lesina FG 5 6410 6410
Poggio Imperiale FG 9 2724 9134
Apricena FG 15 13328 22462
Chieuti FG 17 1698 24160
San Nicandro Garganico FG 19 15566 39726
Serracapriola FG 19 3931 43657
San Paolo di Civitate FG 20 5818 49475

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km N of San Severo (53905 inhabitants)
52 Km NW of Foggia (151991 inhabitants)
56 Km NW of Manfredonia (57279 inhabitants)
84 Km NW of Cerignola (58396 inhabitants)
98 Km NE of Benevento (60091 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 1.4 2021-08-25
23:34:49		 41.9045 15.3565 10 2021-12-29
11:12:52		 Bollettino Sismico Italiano INGV 97716251
Reviewed
Rev100 		ML 1.4 2021-08-25
23:34:49		 41.8855 15.3557 10 2021-08-25
23:43:00		 Sala Sismica INGV-Roma 94638771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-25 23:34:49 ± 0.13
Latitude 41.9045 ± 0.0072
Longitude 15.3565 ± 0.0073
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 97716251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 719
Semi-minor axis of confidence ellipse (meter) 597
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 341
Circular confidence region, given by single value of horizontal uncertainty (meter) 720.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
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) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.15558
Epicentral distance of station farthest from the epicenter (degree) 0.45506
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 97716251
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-23 12:03:26

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 94638771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-25 23:43:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MSAG.HNE. 2021-08-25T23:35:06.50 0.6 undecidable manual S 115 50.5161 50 0.64 41
OT.OT07.EHN. 2021-08-25T23:35:04.28 0.6 undecidable manual S 136 43.4232 50 0.3 46
OT.OT14.EHZ. 2021-08-25T23:35:04.33 0.6 undecidable manual S 91 45.4212 50 -0.19 47
IV.SGRT.HHZ. 2021-08-25T23:35:02.04 0.6 undecidable manual S 117 36.0417 50 0.03 49
OT.OT06.EHN. 2021-08-25T23:35:00.73 0.6 undecidable manual S 141 31.2465 50 0 50
OT.OT03.EHN. 2021-08-25T23:35:00.82 0.6 undecidable manual S 131 32.2455 50 -0.18 48
OT.OT05.EHZ. 2021-08-25T23:35:00.71 0.6 undecidable manual S 143 33.9438 50 -0.74 41
IV.MELA.HHZ. 2021-08-25T23:35:00.53 0.6 undecidable manual S 221 29.0487 50 0.39 46
OT.OT14.EHZ. 2021-08-25T23:34:59.02 0.3 undecidable manual P 91 45.4212 50 0.77 59
IV.TREM.HHN. 2021-08-25T23:34:59.50 0.6 undecidable manual S 28 27.3504 50 -0.18 48
OT.OT04.EHZ. 2021-08-25T23:34:59.48 0.6 undecidable manual S 138 27.6501 50 -0.28 47
IV.MSAG.HNE. 2021-08-25T23:34:59.63 0.3 undecidable manual P 115 50.5161 50 0.61 62
IV.APRC.HHZ. 2021-08-25T23:34:58.45 0.6 undecidable manual S 137 22.4553 114 0.24 48
OT.OT07.EHN. 2021-08-25T23:34:58.10 0.3 undecidable manual P 136 43.4232 50 0.16 71
IV.CIGN.HHN. 2021-08-25T23:34:58.91 0.6 undecidable manual P 234 46.5201 50 0.49 44
OT.OT16.EHZ. 2021-08-25T23:34:56.53 0.6 undecidable manual S 243 17.2716 120 -0.07 50
IV.SGRT.HHZ. 2021-08-25T23:34:56.65 0.3 undecidable manual P 117 36.0417 50 -0.15 72
OT.OT03.EHN. 2021-08-25T23:34:56.16 0.3 undecidable manual P 131 32.2455 50 -0.06 74
IV.MELA.HHZ. 2021-08-25T23:34:55.84 0.3 undecidable manual P 221 29.0487 50 0.12 73
OT.OT06.EHN. 2021-08-25T23:34:55.86 0.3 undecidable manual P 141 31.2465 50 -0.2 72
IV.TREM.HHN. 2021-08-25T23:34:55.27 0.3 undecidable manual P 28 27.3504 50 -0.19 72
OT.OT04.EHZ. 2021-08-25T23:34:55.26 0.1 undecidable manual P 138 27.6501 50 -0.25 95
OT.OT05.EHZ. 2021-08-25T23:34:55.78 0.3 undecidable manual P 143 33.9438 50 -0.7 62
IV.APRC.HHZ. 2021-08-25T23:34:54.67 0.1 undecidable manual P 137 22.4553 114 0.06 100
OT.OT16.EHZ. 2021-08-25T23:34:53.49 0.1 undecidable manual P 243 17.2716 120 -0.19 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OT.OT16.EHE. ML:1.7 0.000419 0.38 AML other m 2021-08-25T23:34:56.82
OT.OT16.EHN. ML:1.6 0.00035299999999999996 1.42 AML other m 2021-08-25T23:34:57.00
IV.APRC.HHN. ML:1.5 0.0002265 0.6 AML other m 2021-08-25T23:34:58.94
IV.APRC.HHE. ML:1.3 0.00014700000000000002 0.16 AML other m 2021-08-25T23:34:59.29
IV.MELA.HHE. ML:1.5 0.0001555 0.26 AML other m 2021-08-25T23:35:00.80
IV.SGRT.HHE. ML:1.2 0.00006154999999999999 0.18 AML other m 2021-08-25T23:35:02.34
IV.SGRT.HHN. ML:1.2 0.00006429999999999999 0.14 AML other m 2021-08-25T23:35:02.28
IV.MELA.HHN. ML:1.4 0.00013749999999999998 0.5 AML other m 2021-08-25T23:35:04.32
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