Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 29-09-2021 and time 18:27:21 (UTC) in region 3 km NE San Giovanni Rotondo (FG)

A magnitude ML 1.5 earthquake occured in region: 3 km NE San Giovanni Rotondo (FG), on

  • 29-09-2021 18:27:21 (UTC)
  • 29-09-2021 20:27:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7300, 15.7570 at 26 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 3 27184 27184
San Marco in Lamis FG 10 13831 41015
Cagnano Varano FG 11 7330 48345
Rignano Garganico FG 15 2117 50462
Carpino FG 15 4182 54644
Monte Sant'Angelo FG 17 12657 67301
Manfredonia FG 18 57279 124580

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km NW of Manfredonia (57279 inhabitants)
32 Km E of San Severo (53905 inhabitants)
35 Km NE of Foggia (151991 inhabitants)
53 Km N of Cerignola (58396 inhabitants)
63 Km NW of Barletta (94814 inhabitants)
72 Km NW of Andria (100440 inhabitants)
75 Km NW of Trani (56217 inhabitants)
82 Km NW of Bisceglie (55422 inhabitants)
91 Km NW of Molfetta (59874 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 2021-09-29
18:27:21		 41.73 15.7568 26 2022-03-30
13:04:09		 Bollettino Sismico Italiano INGV 96313371
Reviewed
Rev100 		ML 1.6 2021-09-29
18:27:21		 41.732 15.7542 26 2021-09-29
18:51:23		 Sala Sismica INGV-Roma 96040941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-29 18:27:21 ± 0.1
Latitude 41.7300 ± 0.0045
Longitude 15.7568 ± 0.0036
Depth (km) 26 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96313371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 446
Semi-minor axis of confidence ellipse (meter) 335
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 186
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.43347
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 96313371
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-18 11:17:54

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 96040941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-29 18:51:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CDRU.HHZ. 2021-09-29T18:27:46.99 3.0 undecidable manual Pg 3.17 0
IX.PGN3.HHZ.02 2021-09-29T18:27:42.05 3.0 undecidable manual Pn 0.04 0
IV.TREM.HHZ. 2021-09-29T18:27:37.19 0.6 undecidable manual S 335 48.1185 112 -0.13 46
IV.MRVN.HHZ. 2021-09-29T18:27:35.81 3.0 positive manual P -0.44 0
OT.OT13.EHE. 2021-09-29T18:27:34.70 0.6 undecidable manual S 64 38.7279 118 -0.34 44
OT.OT14.EHZ. 2021-09-29T18:27:31.30 0.6 undecidable manual S 34 22.2555 135 -0.17 47
OT.OT04.EHZ. 2021-09-29T18:27:30.15 0.6 undecidable manual S 266 14.6742 147 -0.03 49
IV.MSAG.HHZ. 2021-09-29T18:27:30.03 0.1 undecidable manual S 99 12.7761 151 0.1 97
OT.OT12.EHZ. 2021-09-29T18:27:30.40 0.6 undecidable manual S 131 16.5723 144 -0.08 48
OT.OT06.EHN. 2021-09-29T18:27:30.17 0.1 undecidable manual S 250 14.3745 148 0.03 98
IV.TREM.HHZ. 2021-09-29T18:27:30.36 0.1 undecidable manual P 335 48.1185 112 -0.16 91
IV.APRC.HHZ. 2021-09-29T18:27:30.71 0.6 undecidable manual S 280 17.9709 141 0.01 49
OT.OT05.EHZ. 2021-09-29T18:27:30.20 0.6 undecidable manual S 238 14.9739 147 -0.03 49
OT.OT07.EHN. 2021-09-29T18:27:29.85 0.1 undecidable manual S 194 12.4764 152 -0.03 98
OT.OT13.EHE. 2021-09-29T18:27:29.72 0.3 undecidable manual P 64 38.7279 118 0.51 63
IV.SGRT.HHZ. 2021-09-29T18:27:29.13 0.1 undecidable manual S 338 2.8971 173 0.03 100
OT.OT03.EHN. 2021-09-29T18:27:29.61 0.1 undecidable manual S 257 9.0798 159 0.1 98
OT.OT14.EHZ. 2021-09-29T18:27:27.10 0.1 positive manual P 34 22.2555 135 -0.04 97
OT.OT06.EHN. 2021-09-29T18:27:26.34 0.1 undecidable manual P 250 14.3745 148 -0.03 98
IV.APRC.HHZ. 2021-09-29T18:27:26.72 0.1 negative manual P 280 17.9709 141 0.02 98
OT.OT03.EHN. 2021-09-29T18:27:26.04 0.1 positive manual P 257 9.0798 159 0.03 99
OT.OT05.EHZ. 2021-09-29T18:27:26.36 0.1 undecidable manual P 238 14.9739 147 -0.07 97
OT.OT07.EHN. 2021-09-29T18:27:26.17 0.1 positive manual P 194 12.4764 152 -0.05 98
OT.OT04.EHZ. 2021-09-29T18:27:26.41 0.1 positive manual P 266 14.6742 147 0.01 99
IV.MSAG.HHZ. 2021-09-29T18:27:26.27 0.1 positive manual P 99 12.7761 151 0.02 99
OT.OT12.EHZ. 2021-09-29T18:27:26.41 0.1 positive manual P 131 16.5723 144 -0.16 95
IV.SGRT.HHZ. 2021-09-29T18:27:25.90 0.1 positive manual P 338 2.8971 173 0.13 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SGRT.HHN. ML:1.7 0.00030652205 0.1408 AML other m 2021-09-29T18:27:29.27
IV.SGRT.HHE. ML:2.0 0.0005715 0.14 AML other m 2021-09-29T18:27:29.39
IV.MSAG.HHN. ML:1.2 0.0000903039 0.2304 AML other m 2021-09-29T18:27:30.41
OT.OT05.EHN. ML:1.3 0.000101527215 0.2944 AML other m 2021-09-29T18:27:30.46
IV.MSAG.HHE. ML:0.9 0.00003881021 0.1024 AML other m 2021-09-29T18:27:30.35
IV.MSAG.HNE. ML:1.3 0.00010702082999999999 0.0768 AML other m 2021-09-29T18:27:30.36
IV.MSAG.HNN. ML:1.6 0.00020473089999999998 0.0768 AML other m 2021-09-29T18:27:30.42
OT.OT12.EHE. ML:0.7 0.00002565752 0.3584 AML other m 2021-09-29T18:27:30.84
IV.APRC.HHE. ML:1.4 0.00011124648500000001 0.1408 AML other m 2021-09-29T18:27:30.76
IV.APRC.HNE. ML:1.5 0.00013913946999999998 0.1536 AML other m 2021-09-29T18:27:30.76
IV.APRC.HHN. ML:1.6 0.00019460333000000002 0.1152 AML other m 2021-09-29T18:27:30.95
OT.OT05.EHE. ML:0.0 0.0000060346310000000004 0.1536 AML other m 2021-09-29T18:27:30.90
IV.TREM.HNE. ML:1.7 0.00010948764 0.4736 AML other m 2021-09-29T18:27:37.64
IV.TREM.HHE. ML:1.5 0.00007679497000000001 0.4992 AML other m 2021-09-29T18:27:37.66
IV.TREM.HHN. ML:1.8 0.00014299999999999998 0.26 AML other m 2021-09-29T18:27:37.60
IV.TREM.HNN. ML:1.7 0.00012702519500000002 0.2816 AML other m 2021-09-29T18:27:37.46
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