Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 27-08-2021 and time 07:35:18 (Italy) in region 1 km S Ripabottoni (CB)

A magnitude ML 1.6 earthquake occured in region: 1 km S Ripabottoni (CB), on

  • 27-08-2021 05:35:18 (UTC)
  • 27-08-2021 07:35:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.6790, 14.8100 at 20 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
Ripabottoni CB 1 514 514
Morrone del Sannio CB 5 587 1101
Provvidenti CB 5 119 1220
Campolieto CB 6 839 2059
Castellino del Biferno CB 7 545 2604
Casacalenda CB 8 2135 4739
Monacilioni CB 8 523 5262
Sant'Elia a Pianisi CB 8 1818 7080
Petrella Tifernina CB 10 1170 8250
Bonefro CB 11 1384 9634
Matrice CB 11 1115 10749
San Giovanni in Galdo CB 11 580 11329
Lupara CB 11 505 11834
Lucito CB 12 696 12530
Montagano CB 12 1086 13616
Castelbottaccio CB 12 312 13928
Pietracatella CB 12 1375 15303
Toro CB 12 1391 16694
Macchia Valfortore CB 13 576 17270
San Giuliano di Puglia CB 13 1042 18312
Montelongo CB 13 365 18677
Montorio nei Frentani CB 14 437 19114
Colletorto CB 14 1938 21052
Guardialfiera CB 14 1065 22117
Ripalimosani CB 14 3114 25231
Campodipietra CB 14 2570 27801
Civitacampomarano CB 15 417 28218
Limosano CB 16 768 28986
Santa Croce di Magliano CB 16 4435 33421
Larino CB 16 6793 40214
Carlantino FG 17 980 41194
Sant'Angelo Limosano CB 17 352 41546
Jelsi CB 18 1781 43327
Rotello CB 18 1212 44539
Campobasso CB 18 49431 93970
San Biase CB 19 189 94159
Castelmauro CB 19 1505 95664
Celenza Valfortore FG 19 1598 97262
Gildone CB 20 809 98071

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km W of San Severo (53905 inhabitants)
61 Km N of Benevento (60091 inhabitants)
66 Km W of Foggia (151991 inhabitants)
78 Km NE of Caserta (76326 inhabitants)
85 Km N of Avellino (54857 inhabitants)
89 Km NE of Acerra (59573 inhabitants)
92 Km SE of Chieti (51815 inhabitants)
92 Km W of Manfredonia (57279 inhabitants)
93 Km NE of Aversa (53047 inhabitants)
94 Km NE of Afragola (65057 inhabitants)
96 Km NE of Casoria (77642 inhabitants)
98 Km NE of Giugliano in Campania (122974 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 2021-08-27
05:35:18		 41.6793 14.8102 20 2021-12-29
11:12:23		 Bollettino Sismico Italiano INGV 94820451
Reviewed
Rev100 		ML 1.6 2021-08-27
05:35:17		 41.6738 14.8162 23 2021-08-27
05:49:29		 Sala Sismica INGV-Roma 94693131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-27 05:35:18 ± 0.13
Latitude 41.6793 ± 0.0054
Longitude 14.8102 ± 0.0072
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 94820451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 720
Semi-minor axis of confidence ellipse (meter) 101
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 312
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) 48
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 30
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) 1.20869
Number of stations at which the event was observed 39
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 94820451
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-23 10:14:09

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 94693131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-27 05:49:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MSSA.HHZ. 2021-08-27T05:37:24.26 3.0 undecidable manual Sn 6.01 0
IV.MNTV.EHZ. 2021-08-27T05:37:17.03 3.0 undecidable manual Sn 2.29 0
GU.LSD.HHZ. 2021-08-27T05:37:15.38 3.0 undecidable manual P 1.933 0
CR.ZAG.BHZ. 2021-08-27T05:37:12.68 3.0 undecidable manual Sn 4.24 0
IV.IMOL.HNZ. 2021-08-27T05:37:02.66 3.0 undecidable manual Sg 13.39 0
IV.MOCL.EHZ. 2021-08-27T05:36:50.83 3.0 undecidable manual Sn 0.69 0
IV.SALO.HHZ. 2021-08-27T05:36:49.36 3.0 undecidable manual P 1.692 0
OX.CIMO.HHZ. 2021-08-27T05:36:48.35 3.0 undecidable manual P 1.7 0
IV.GIZZ.HHZ. 2021-08-27T05:36:37.93 3.0 undecidable manual Sn 1.39 0
IV.ZEN8.EHZ. 2021-08-27T05:36:26.77 3.0 positive manual P -4.62 0
IV.FIR.HHZ. 2021-08-27T05:36:23.33 3.0 undecidable manual P 1.387 0
MN.TRI.HHZ. 2021-08-27T05:36:14.50 3.0 undecidable manual P -5.32 0
IV.TOLF.HHZ. 2021-08-27T05:36:13.83 3.0 undecidable manual Sn -1.69 0
IV.SRES.HHZ. 2021-08-27T05:36:07.13 3.0 undecidable manual Sn -0.36 0
IV.CRTC.HHZ. 2021-08-27T05:36:04.89 3.0 undecidable manual P 6.82 0
IV.SELL.HHZ. 2021-08-27T05:36:03.31 3.0 positive manual P -1.71 0
IV.MGAB.HHZ. 2021-08-27T05:35:55.22 3.0 undecidable manual P -0.4 0
IV.SACS.HHZ. 2021-08-27T05:35:53.83 3.0 undecidable manual P -3.15 0
IV.MRVN.HHZ. 2021-08-27T05:35:40.90 0.6 undecidable manual P 120 134.1657 94 0.74 33
IV.MSAG.HHZ. 2021-08-27T05:35:34.68 0.3 undecidable manual P 87 91.1421 96 1.13 46
OT.OT12.EHZ. 2021-08-27T05:35:34.11 1.0 undecidable manual P 93 91.1421 96 0.56 20
IV.PSB1.HHZ. 2021-08-27T05:35:33.90 1.0 undecidable manual S 180 50.616 103 -0.33 23
IV.SGRT.HHZ. 2021-08-27T05:35:31.55 1.0 undecidable manual P 84 77.7666 98 0.05 23
OT.OT04.EHE. 2021-08-27T05:35:29.98 0.6 undecidable manual P 86 63.9915 100 0.58 41
OT.OT16.EHZ. 2021-08-27T05:35:29.60 0.3 undecidable manual S 60 34.4433 111 -0.49 68
IV.SACR.HHZ. 2021-08-27T05:35:29.70 0.3 undecidable manual S 196 32.4453 112 0.1 74
IV.LPEL.HHZ. 2021-08-27T05:35:29.41 0.3 undecidable manual P 308 65.8896 99 -0.28 66
OT.OT05.EHE. 2021-08-27T05:35:29.61 0.3 undecidable manual P 92 65.6898 99 -0.05 71
IV.MELA.HHZ. 2021-08-27T05:35:28.00 0.3 undecidable manual S 83 26.4513 118 -0.14 75
OT.OT06.EHZ. 2021-08-27T05:35:28.50 1.0 undecidable manual P 89 64.9905 99 -1.05 17
IT.GLNS.HNZ. 2021-08-27T05:35:28.90 0.3 undecidable manual S 19 27.3504 117 0.54 68
IV.RNI2.HHZ. 2021-08-27T05:35:28.23 0.6 undecidable manual P 273 54.501 102 0.26 46
IV.APRC.HHZ. 2021-08-27T05:35:28.58 0.3 undecidable manual P 82 61.2942 100 -0.41 66
IV.PSB1.HHZ. 2021-08-27T05:35:27.07 0.3 undecidable manual P 180 50.616 103 -0.3 69
IT.PLTA.HNZ. 2021-08-27T05:35:27.60 0.3 undecidable manual S 356 23.0547 123 0.23 74
IV.BSSO.HHZ. 2021-08-27T05:35:27.60 0.3 undecidable manual S 231 23.2545 122 0.19 75
IT.LRNO.HNZ. 2021-08-27T05:35:26.06 0.6 undecidable manual S 33 16.7721 133 0.01 52
IV.GATE.HHZ. 2021-08-27T05:35:26.81 0.6 undecidable manual S 156 20.1687 127 0.07 51
IV.MIDA.HNZ. 2021-08-27T05:35:26.35 0.3 undecidable manual P 265 46.3203 104 -0.38 68
IV.TST01.HHN. 2021-08-27T05:35:25.31 0.3 undecidable manual P 283 35.8419 110 0.12 74
OT.OT16.EHZ. 2021-08-27T05:35:24.46 0.3 undecidable manual P 60 34.4433 111 -0.52 67
IV.SACR.HHZ. 2021-08-27T05:35:24.53 0.1 positive manual P 196 32.4453 112 -0.17 97
IV.MELA.HHZ. 2021-08-27T05:35:23.52 0.3 undecidable manual P 83 26.4513 118 -0.34 71
IT.GLNS.HNZ. 2021-08-27T05:35:23.89 0.3 undecidable manual P 19 27.3504 117 -0.09 75
IT.PLTA.HNZ. 2021-08-27T05:35:23.43 0.3 undecidable manual P 356 23.0547 123 0.02 77
IV.GATE.HHZ. 2021-08-27T05:35:23.60 0.3 undecidable manual P 156 20.1687 127 0.55 68
IV.BSSO.HHZ. 2021-08-27T05:35:23.58 0.1 undecidable manual P 231 23.2545 122 0.14 100
IT.LRNO.HNZ. 2021-08-27T05:35:22.48 0.3 undecidable manual P 33 16.7721 133 -0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BSSO.HHE. ML:1.2 0.000079463175 0.9408 AML other m 2021-08-27T05:35:27.91
IV.MELA.HHE. ML:1.9 0.000329 0.34 AML other m 2021-08-27T05:35:28.08
IV.BSSO.HHN. ML:1.4 0.000134 0.5 AML other m 2021-08-27T05:35:28.21
IV.MELA.HNN. ML:2.0 0.0005375 0.38 AML other m 2021-08-27T05:35:28.13
IV.MELA.HHN. ML:2.1 0.000612 0.38 AML other m 2021-08-27T05:35:28.13
IV.MELA.HNE. ML:1.8 0.000292 0.6 AML other m 2021-08-27T05:35:28.56
IV.GATE.HHN. ML:1.3 0.000099587515 1.68 AML other m 2021-08-27T05:35:28.75
OT.OT16.EHE. ML:2.0 0.000377 0.28 AML other m 2021-08-27T05:35:29.96
IV.SACR.HHE. ML:1.3 0.0000766 1.64 AML other m 2021-08-27T05:35:29.12
OT.OT16.EHN. ML:1.9 0.00026450000000000003 1.72 AML other m 2021-08-27T05:35:30.00
IV.GATE.HHE. ML:1.3 0.000122 0.28 AML other m 2021-08-27T05:35:30.03
IV.GATE.HNE. ML:1.3 0.00011999999999999999 0.3 AML other m 2021-08-27T05:35:30.02
IV.SACR.HHN. ML:1.4 0.0000926 0.4 AML other m 2021-08-27T05:35:30.22
IV.GATE.HNN. ML:1.3 0.00012204999999999999 1.48 AML other m 2021-08-27T05:35:30.23
IV.APRC.HHE. ML:1.7 0.0000917 0.96 AML other m 2021-08-27T05:35:37.47
IV.APRC.HHN. ML:1.7 0.00010415 0.96 AML other m 2021-08-27T05:35:37.48
IV.SGRT.HHE. ML:1.6 0.00005243665 0.16 AML other m 2021-08-27T05:35:44.71
IV.SGRT.HHN. ML:1.5 0.00004214677 0.1408 AML other m 2021-08-27T05:35:45.25
IV.MSAG.HHE. ML:1.3 0.00002077525 0.88 AML other m 2021-08-27T05:35:45.55
OT.OT12.EHN. ML:1.9 0.00008025216 0.2816 AML other m 2021-08-27T05:35:47.43
OT.OT12.EHE. ML:1.6 0.00005029976499999999 0.32 AML other m 2021-08-27T05:35:47.51
IV.MSAG.HHN. ML:1.4 0.000031652420000000003 0.2784 AML other m 2021-08-27T05:35:49.37
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