Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 18-09-2021 and time 05:25:47 (Italy) in region 6 km E San Giovanni Rotondo (FG)

A magnitude ML 1.5 earthquake occured in region: 6 km E San Giovanni Rotondo (FG), on

  • 18-09-2021 03:25:47 (UTC)
  • 18-09-2021 05:25:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7080, 15.7990 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
San Giovanni Rotondo FG 6 27184 27184
Monte Sant'Angelo FG 13 12657 39841
San Marco in Lamis FG 13 13831 53672
Manfredonia FG 13 57279 110951
Cagnano Varano FG 14 7330 118281
Carpino FG 16 4182 122463
Rignano Garganico FG 18 2117 124580

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km NW of Manfredonia (57279 inhabitants)
35 Km NE of Foggia (151991 inhabitants)
35 Km E of San Severo (53905 inhabitants)
50 Km N of Cerignola (58396 inhabitants)
59 Km NW of Barletta (94814 inhabitants)
68 Km NW of Andria (100440 inhabitants)
71 Km NW of Trani (56217 inhabitants)
78 Km NW of Bisceglie (55422 inhabitants)
87 Km NW of Molfetta (59874 inhabitants)
100 Km NW of Bitonto (55540 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 1.5 2021-09-18
03:25:47		 41.7083 15.7992 16 2022-03-30
13:04:07		 Bollettino Sismico Italiano INGV 95662151
Reviewed
Rev100 		ML 1.5 2021-09-18
03:25:47		 41.7037 15.8058 17 2021-09-18
03:30:15		 Sala Sismica INGV-Roma 95565871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-18 03:25:47 ± 0.14
Latitude 41.7083 ± 0.0054
Longitude 15.7992 ± 0.0048
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95662151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 592
Semi-minor axis of confidence ellipse (meter) 244
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 344
Circular confidence region, given by single value of horizontal uncertainty (meter) 590.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
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) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.06205
Epicentral distance of station farthest from the epicenter (degree) 0.71226
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:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 95662151
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-01 14:22:10

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 95565871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-18 03:30:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TREM.HHZ. 2021-09-18T03:26:04.00 0.3 undecidable manual S 333 51.8037 97 0.02 69
IV.MRVN.HHZ. 2021-09-18T03:26:02.17 0.3 undecidable manual P 155 79.0653 94 0.93 51
OT.OT13.EHZ. 2021-09-18T03:25:59.58 0.3 undecidable manual S 59 36.8298 101 -0.44 67
IV.TREM.HHZ. 2021-09-18T03:25:57.39 0.3 undecidable manual P 333 51.8037 97 0.32 65
IV.APRC.HHZ. 2021-09-18T03:25:56.18 0.1 undecidable manual S 284 21.867 113 -0.02 99
OT.OT14.EHZ. 2021-09-18T03:25:56.20 0.3 undecidable manual S 23 22.6551 112 -0.2 73
OT.OT04.EHE. 2021-09-18T03:25:55.26 0.1 undecidable manual S 274 18.1707 120 -0.04 99
OT.OT13.EHZ. 2021-09-18T03:25:54.54 0.3 undecidable manual P 59 36.8298 101 -0.24 70
OT.OT05.EHE. 2021-09-18T03:25:54.69 0.1 undecidable manual S 252 17.1717 122 -0.39 92
OT.OT03.EHE. 2021-09-18T03:25:54.17 0.3 undecidable manual S 272 12.3765 134 0.1 75
IV.SGRT.HHZ. 2021-09-18T03:25:53.52 0.3 undecidable manual S 318 6.8931 152 0.35 71
IV.MSAG.HHZ. 2021-09-18T03:25:53.89 0.1 undecidable manual S 87 9.1797 144 0.4 94
OT.OT07.EHE. 2021-09-18T03:25:53.89 0.1 undecidable manual S 214 11.6772 135 -0.05 99
OT.OT12.EHZ. 2021-09-18T03:25:53.85 0.1 undecidable manual S 133 12.3765 134 -0.22 96
OT.OT14.EHZ. 2021-09-18T03:25:52.61 0.1 positive manual P 23 22.6551 112 -0.08 99
OT.OT04.EHE. 2021-09-18T03:25:52.06 0.1 undecidable manual P 274 18.1707 120 0.01 100
IV.APRC.HHZ. 2021-09-18T03:25:52.55 0.1 undecidable manual P 284 21.867 113 -0.02 99
OT.OT07.EHE. 2021-09-18T03:25:51.22 0.1 undecidable manual P 214 11.6772 135 -0.05 100
OT.OT12.EHZ. 2021-09-18T03:25:51.14 0.1 undecidable manual P 133 12.3765 134 -0.2 97
OT.OT06.EHZ. 2021-09-18T03:25:51.86 0.1 undecidable manual P 262 17.1717 122 -0.06 99
OT.OT03.EHE. 2021-09-18T03:25:51.42 0.1 undecidable manual P 272 12.3765 134 0.08 100
IV.SGRT.HHZ. 2021-09-18T03:25:51.08 0.1 undecidable manual P 318 6.8931 152 0.26 97
IV.MSAG.HHZ. 2021-09-18T03:25:51.12 0.1 negative manual P 87 9.1797 144 0.11 99
OT.OT05.EHE. 2021-09-18T03:25:51.67 0.1 positive manual P 252 17.1717 122 -0.26 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MSAG.HNE. ML:1.4 0.000225 0.44 AML other m 2021-09-18T03:25:53.83
IV.MSAG.HHE. ML:1.0 0.00009894999999999999 0.44 AML other m 2021-09-18T03:25:53.83
IV.SGRT.HHN. ML:1.0 0.0000998 0.54 AML other m 2021-09-18T03:25:53.84
IV.SGRT.HHE. ML:0.9 0.00008225 0.92 AML other m 2021-09-18T03:25:53.40
IV.MSAG.HNN. ML:1.5 0.0003305 0.62 AML other m 2021-09-18T03:25:54.08
IV.MSAG.HHN. ML:1.2 0.00014649999999999998 0.62 AML other m 2021-09-18T03:25:54.39
IV.APRC.HHE. ML:1.4 0.0001645 0.14 AML other m 2021-09-18T03:25:56.50
IV.APRC.HHN. ML:1.5 0.00017749999999999998 0.58 AML other m 2021-09-18T03:25:56.62
OT.OT13.EHE. ML:1.8 0.0002245 0.34 AML other m 2021-09-18T03:25:59.82
OT.OT13.EHN. ML:2.1 0.000419 1.46 AML other m 2021-09-18T03:26:00.24
IV.TREM.HNN. ML:2.3 0.0005 0.96 AML other m 2021-09-18T03:26:05.20
IV.TREM.HNE. ML:1.8 0.000156 0.64 AML other m 2021-09-18T03:26:05.61
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