Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 17-08-2021 and time 08:15:01 (Italy) in region 1 km NW Santa Croce di Magliano (CB)

A magnitude ML 1.6 earthquake occured in region: 1 km NW Santa Croce di Magliano (CB), on

  • 17-08-2021 06:15:01 (UTC)
  • 17-08-2021 08:15:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7250, 14.9850 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
Santa Croce di Magliano CB 1 4435 4435
Montelongo CB 3 365 4800
Rotello CB 3 1212 6012
San Giuliano di Puglia CB 5 1042 7054
Bonefro CB 5 1384 8438
Montorio nei Frentani CB 6 437 8875
Colletorto CB 7 1938 10813
Larino CB 10 6793 17606
Ururi CB 10 2693 20299
Casacalenda CB 12 2135 22434
Provvidenti CB 13 119 22553
Sant'Elia a Pianisi CB 15 1818 24371
Carlantino FG 15 980 25351
Casalnuovo Monterotaro FG 15 1556 26907
Ripabottoni CB 15 514 27421
Macchia Valfortore CB 16 576 27997
San Martino in Pensilis CB 16 4793 32790
Morrone del Sannio CB 17 587 33377
Serracapriola FG 18 3931 37308
Casalvecchio di Puglia FG 18 1877 39185
Celenza Valfortore FG 18 1598 40783
Guardialfiera CB 18 1065 41848
Pietracatella CB 18 1375 43223
Monacilioni CB 19 523 43746
Castelnuovo della Daunia FG 19 1445 45191

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km W of San Severo (53905 inhabitants)
55 Km NW of Foggia (151991 inhabitants)
68 Km N of Benevento (60091 inhabitants)
78 Km W of Manfredonia (57279 inhabitants)
90 Km NE of Caserta (76326 inhabitants)
92 Km N of Avellino (54857 inhabitants)
92 Km NW of Cerignola (58396 inhabitants)
97 Km SE of Chieti (51815 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 2021-08-17
06:15:01		 41.7253 14.9848 10 2021-12-29
11:12:53		 Bollettino Sismico Italiano INGV 98245721
Reviewed
Rev100 		ML 1.4 2021-08-17
06:15:00		 41.7008 14.9868 16 2021-08-17
06:26:44		 Sala Sismica INGV-Roma 94285011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-17 06:15:01 ± 0.11
Latitude 41.7253 ± 0.0072
Longitude 14.9848 ± 0.0084
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 98245721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 938
Semi-minor axis of confidence ellipse (meter) 302
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 146
Circular confidence region, given by single value of horizontal uncertainty (meter) 940.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.67719
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 94285011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-17 06:26:44

ML:1.6

Field Value
Value 1.6
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 98245721
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-07 16:47:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PLMA.HHZ. 2021-08-17T06:16:55.84 3.0 undecidable manual Sn -2.41 0
IV.HVIT.HHZ. 2021-08-17T06:16:55.53 3.0 undecidable manual Sn 1.07 0
IV.FIR.HHZ. 2021-08-17T06:16:52.35 3.0 undecidable manual Sg 18.129999 0
ST.CARE.HNZ. 2021-08-17T06:16:44.31 3.0 positive manual Pg 21.32 0
IV.EUCT.HNZ. 2021-08-17T06:16:43.21 3.0 positive manual Pg 22.68 0
ST.RONC.EHZ. 2021-08-17T06:16:38.88 3.0 negative manual Pg 20.51 0
GU.PCP.HHZ. 2021-08-17T06:16:35.50 3.0 undecidable manual Pg 15.5 0
IV.ESCV.HHZ. 2021-08-17T06:16:35.09 3.0 undecidable manual Sn -0.66 0
OX.CIMO.HHZ. 2021-08-17T06:16:27.89 3.0 positive manual Pg 14 0
IV.VOBA.EHZ. 2021-08-17T06:16:23.06 3.0 negative manual Pn 7.65 0
SL.KOGS.BHZ. 2021-08-17T06:16:21.92 3.0 undecidable manual Pg 9.61 0
AC.SRN.HHZ. 2021-08-17T06:16:10.79 3.0 undecidable manual Pg 11.92 0
IV.ARVD.HHZ. 2021-08-17T06:16:08.11 3.0 undecidable manual Sn -0.34 0
IV.FIR.HHZ. 2021-08-17T06:16:00.82 3.0 undecidable manual Pg 8.86 0
IV.RAFF.HHZ. 2021-08-17T06:15:57.70 3.0 undecidable manual Pn -2.66 0
IV.HAGA.HHZ. 2021-08-17T06:15:57.97 3.0 undecidable manual Pn -1.18 0
IT.FIE.HGZ. 2021-08-17T06:15:53.38 3.0 negative manual Pn 1.44 0
IV.IMOL.HNZ. 2021-08-17T06:15:52.43 3.0 positive manual Pn -1.71 0
IV.ROM9.HNZ. 2021-08-17T06:15:52.65 3.0 undecidable manual Sn 0.53 0
IV.SPS2.HHZ. 2021-08-17T06:15:42.26 3.0 undecidable manual Pg 7.37 0
IV.ATFO.HHZ. 2021-08-17T06:15:38.68 3.0 negative manual Pn 0.19 0
IV.MRVN.HHZ. 2021-08-17T06:15:31.64 3.0 undecidable manual Sg 1.71 0
IV.MF5.EHZ. 2021-08-17T06:15:30.17 3.0 undecidable manual Pn 1.41 0
IV.LPEL.HHE. 2021-08-17T06:15:24.91 0.6 undecidable manual S 299 75.1692 50 0.48 42
IV.TERO.HHZ. 2021-08-17T06:15:20.61 3.0 undecidable manual Pn -3.33 0
IV.PSB1.HHZ. 2021-08-17T06:15:19.95 0.6 undecidable manual S 195 57.498 50 0.23 46
OT.OT04.EHE. 2021-08-17T06:15:17.70 0.6 undecidable manual S 91 49.3173 50 0.17 48
IV.APRC.HHN. 2021-08-17T06:15:17.01 0.6 undecidable manual S 85 46.3203 50 0.28 47
IV.SACR.HNN. 2021-08-17T06:15:16.08 0.6 undecidable manual S 213 43.1235 50 0.21 47
IV.ACER.HHZ. 2021-08-17T06:15:15.08 3.0 negative manual P -0.52 0
IV.BSSO.HHZ. 2021-08-17T06:15:15.04 0.6 undecidable manual S 239 38.0286 50 0.53 45
IV.LPEL.HHE. 2021-08-17T06:15:14.19 0.6 undecidable manual P 299 75.1692 50 -0.64 39
IV.PSB1.HHZ. 2021-08-17T06:15:11.56 0.1 undecidable manual P 195 57.498 50 -0.55 84
IV.GATE.HNN. 2021-08-17T06:15:11.12 0.6 undecidable manual S 195 24.3534 50 0.26 48
IV.SACR.HNN. 2021-08-17T06:15:10.12 0.6 undecidable manual P 213 43.1235 50 0.23 71
OT.OT04.EHE. 2021-08-17T06:15:10.33 0.3 undecidable manual P 91 49.3173 50 -0.52 64
IV.APRC.HHN. 2021-08-17T06:15:10.09 0.3 undecidable manual P 85 46.3203 50 -0.29 68
IV.BSSO.HHZ. 2021-08-17T06:15:09.11 0.1 undecidable manual P 239 38.0286 50 0 99
OT.OT16.EHZ. 2021-08-17T06:15:09.95 0.3 undecidable manual S 52 19.5693 118 0.58 67
IV.MELA.HHZ. 2021-08-17T06:15:07.46 0.3 undecidable manual S 100 11.9769 131 0.27 73
IV.GATE.HNN. 2021-08-17T06:15:07.21 0.1 undecidable manual P 195 24.3534 50 0.22 97
OT.OT16.EHZ. 2021-08-17T06:15:06.00 0.3 undecidable manual P 52 19.5693 118 -0.14 75
IV.CIGN.HHZ. 2021-08-17T06:15:06.79 0.6 undecidable manual S 220 10.2786 135 0.02 51
IV.CIGN.HHZ. 2021-08-17T06:15:04.28 0.1 undecidable manual P 220 10.2786 135 -0.35 98
IV.MELA.HHZ. 2021-08-17T06:15:04.66 0.1 undecidable manual P 100 11.9769 131 -0.22 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MELA.HNN. ML:1.5 0.0003745 0.1 AML other m 2021-08-17T06:15:07.63
IV.MELA.HHN. ML:1.6 0.00041150000000000003 0.1 AML other m 2021-08-17T06:15:07.63
IV.MELA.HHE. ML:1.4 0.00029400000000000004 0.22 AML other m 2021-08-17T06:15:07.65
IV.CIGN.HHE. ML:0.9 0.00009655 0.42 AML other m 2021-08-17T06:15:09.41
OT.OT16.EHN. ML:1.8 0.0004535 0.32 AML other m 2021-08-17T06:15:10.13
OT.OT16.EHE. ML:1.8 0.000506 0.28 AML other m 2021-08-17T06:15:10.11
IV.CIGN.HHN. ML:0.9 0.00010745000000000001 0.42 AML other m 2021-08-17T06:15:11.40
IV.MELA.HNE. ML:1.4 0.00027949999999999996 0.94 AML other m 2021-08-17T06:15:16.54
IV.TST02.HHE. ML:2.8 0.0014750000000000002 0.1 AML other m 2021-08-17T06:15:42.62
IV.TST02.HHN. ML:2.8 0.00127 0.4 AML other m 2021-08-17T06:15:42.62
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