Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 18-02-2021 and time 22:38:06 (Italy) in region 1 km NW Colletorto (CB)

A magnitude ML 1.3 earthquake occured in region: 1 km NW Colletorto (CB), on

  • 18-02-2021 21:38:06 (UTC)
  • 18-02-2021 22:38:06 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.6720, 14.9670 at 11 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
Colletorto CB 1 1938 1938
San Giuliano di Puglia CB 2 1042 2980
Bonefro CB 4 1384 4364
Santa Croce di Magliano CB 5 4435 8799
Montelongo CB 7 365 9164
Carlantino FG 9 980 10144
Rotello CB 9 1212 11356
Sant'Elia a Pianisi CB 9 1818 13174
Macchia Valfortore CB 10 576 13750
Montorio nei Frentani CB 10 437 14187
Celenza Valfortore FG 12 1598 15785
Casacalenda CB 12 2135 17920
Pietracatella CB 13 1375 19295
Casalnuovo Monterotaro FG 13 1556 20851
Provvidenti CB 13 119 20970
Ripabottoni CB 13 514 21484
Monacilioni CB 15 523 22007
Casalvecchio di Puglia FG 15 1877 23884
Larino CB 15 6793 30677
Castelnuovo della Daunia FG 16 1445 32122
Morrone del Sannio CB 16 587 32709
San Marco la Catola FG 17 1012 33721
Ururi CB 17 2693 36414
Campolieto CB 17 839 37253
Gambatesa CB 19 1464 38717
Pietramontecorvino FG 20 2721 41438
Castellino del Biferno CB 20 545 41983
Toro CB 20 1391 43374

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km W of San Severo (53905 inhabitants)
53 Km W of Foggia (151991 inhabitants)
62 Km N of Benevento (60091 inhabitants)
79 Km W of Manfredonia (57279 inhabitants)
85 Km NE of Caserta (76326 inhabitants)
85 Km N of Avellino (54857 inhabitants)
90 Km NW of Cerignola (58396 inhabitants)
95 Km NE of Acerra (59573 inhabitants)
100 Km NE of Afragola (65057 inhabitants)
100 Km NE of Aversa (53047 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 1.3 2021-02-18
21:38:06		 41.6722 14.9667 11 2021-07-12
16:55:06		 Bollettino Sismico Italiano INGV 89225311
Reviewed
Rev100 		ML 1.4 2021-02-18
21:38:06		 41.7217 14.9407 11 2021-02-18
21:44:04		 Sala Sismica INGV-Roma 87285121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-18 21:38:06 ± 0.11
Latitude 41.6722 ± 0.0081
Longitude 14.9667 ± 0.0072
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89225311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 873
Semi-minor axis of confidence ellipse (meter) 341
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 353
Circular confidence region, given by single value of horizontal uncertainty (meter) 870.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 52
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.04946
Epicentral distance of station farthest from the epicenter (degree) 0.86065
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 89225311
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-18 18:07:30

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 87285121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-18 21:44:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.INTR.HHZ. 2021-02-18T21:38:33.87 0.6 undecidable manual S 294 95.5377 50 -0.69 37
IV.SGRT.HHZ. 2021-02-18T21:38:26.65 0.6 undecidable manual S 82 64.9905 50 0.24 44
OT.OT04.EHZ. 2021-02-18T21:38:22.84 0.6 undecidable manual S 84 51.1155 50 0.13 46
IV.APRC.HHZ. 2021-02-18T21:38:21.99 0.3 undecidable manual S 79 48.618 50 -0.06 71
IV.INTR.HHZ. 2021-02-18T21:38:21.27 0.3 undecidable manual P 294 95.5377 50 -1.43 38
IV.SNAL.HHZ. 2021-02-18T21:38:20.96 0.3 undecidable manual P 166 85.248 50 -0.16 65
IV.TRIV.HHZ. 2021-02-18T21:38:19.18 0.6 undecidable manual S 287 36.0417 50 0.49 44
OT.OT11.EHZ. 2021-02-18T21:38:19.58 0.6 undecidable manual S 120 35.2425 50 1.11 34
IV.SACR.HHZ. 2021-02-18T21:38:19.75 0.6 undecidable manual S 216 37.4292 50 0.7 41
IV.SGRT.HHZ. 2021-02-18T21:38:18.02 0.3 undecidable manual P 82 64.9905 50 0.03 69
IV.BSSO.HHZ. 2021-02-18T21:38:18.64 0.6 undecidable manual S 246 33.9438 50 0.51 44
IT.GLNS.HNZ. 2021-02-18T21:38:17.26 0.6 undecidable manual S 351 26.9508 50 1.01 36
IV.TREM.HNN. 2021-02-18T21:38:17.88 0.3 undecidable manual P 42 67.1772 50 -0.45 63
OT.OT04.EHZ. 2021-02-18T21:38:15.55 0.3 undecidable manual P 84 51.1155 50 -0.31 67
IV.APRC.HHZ. 2021-02-18T21:38:15.25 0.3 undecidable manual P 79 48.618 50 -0.23 68
OT.OT06.EHN. 2021-02-18T21:38:15.29 0.3 undecidable manual P 88 52.0035 50 -0.71 59
IV.MELA.HHZ. 2021-02-18T21:38:13.12 0.6 undecidable manual S 74 13.7751 128 0.58 44
IV.SACR.HHZ. 2021-02-18T21:38:13.67 0.3 undecidable manual P 216 37.4292 50 -0.07 72
IT.LRNO.HNZ. 2021-02-18T21:38:13.63 0.6 undecidable manual S 346 15.3735 125 0.64 43
IV.TRIV.HHZ. 2021-02-18T21:38:13.68 0.3 undecidable manual P 287 36.0417 50 0.14 71
OT.OT11.EHZ. 2021-02-18T21:38:13.35 0.1 undecidable manual P 120 35.2425 50 -0.06 97
IV.BSSO.HHZ. 2021-02-18T21:38:13.24 0.1 undecidable manual P 246 33.9438 50 0.03 98
IT.GLNS.HNZ. 2021-02-18T21:38:12.08 0.3 undecidable manual P 351 26.9508 50 -0.05 74
IV.MELA.HHZ. 2021-02-18T21:38:10.07 0.1 positive manual P 74 13.7751 128 0.09 100
IT.LRNO.HNZ. 2021-02-18T21:38:10.18 0.3 undecidable manual P 346 15.3735 125 -0.07 75
IV.CIGN.HHZ. 2021-02-18T21:38:10.72 0.6 undecidable manual S 249 5.4945 153 0.08 51
IV.CIGN.HHZ. 2021-02-18T21:38:08.62 0.1 positive manual P 249 5.4945 153 -0.27 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CIGN.HHE. ML:1.3 0.00029099999999999997 0.3 AML other m 2021-02-18T21:38:10.77
IV.CIGN.HHN. ML:1.4 0.000347 1.38 AML other m 2021-02-18T21:38:11.23
IV.MELA.HNN. ML:1.8 0.000603 0.12 AML other m 2021-02-18T21:38:13.49
IV.MELA.HHN. ML:1.8 0.0006635 0.3 AML other m 2021-02-18T21:38:13.43
IV.MELA.HHE. ML:1.4 0.000261 0.82 AML other m 2021-02-18T21:38:14.80
IV.MELA.HNE. ML:1.6 0.00036350000000000005 0.82 AML other m 2021-02-18T21:38:14.80
IV.BSSO.HHE. ML:1.2 0.000058099999999999996 0.9 AML other m 2021-02-18T21:38:19.57
IV.BSSO.HHN. ML:1.1 0.0000514 1.56 AML other m 2021-02-18T21:38:19.82
OT.OT11.EHE. ML:2.0 0.0004075 1.86 AML other m 2021-02-18T21:38:20.95
IV.SACR.HHE. ML:1.1 0.000047799999999999996 0.4 AML other m 2021-02-18T21:38:20.37
IV.SACR.HNN. ML:1.4 0.00008458916499999999 0.2944 AML other m 2021-02-18T21:38:20.37
IV.SACR.HHN. ML:1.4 0.00008765 0.28 AML other m 2021-02-18T21:38:20.23
OT.OT11.EHN. ML:1.9 0.0003255 0.5 AML other m 2021-02-18T21:38:20.26
IV.TRIV.HHN. ML:1.2 0.00005300000000000001 1.08 AML other m 2021-02-18T21:38:20.05
IV.SACR.HNE. ML:1.1 0.00004802564 0.3328 AML other m 2021-02-18T21:38:21.31
IV.TRIV.HHE. ML:1.0 0.000034500000000000005 0.66 AML other m 2021-02-18T21:38:22.43
IV.APRC.HHE. ML:1.4 0.0000639 0.46 AML other m 2021-02-18T21:38:23.38
IV.APRC.HHN. ML:1.5 0.00008549999999999999 0.7 AML other m 2021-02-18T21:38:25.29
IV.SGRT.HHN. ML:1.1 0.00002295 0.42 AML other m 2021-02-18T21:38:30.09
IV.SGRT.HHE. ML:1.1 0.000023800000000000003 1.46 AML other m 2021-02-18T21:38:30.74
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