Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 20-01-2021 and time 06:34:54 (UTC) in region 2 km E Ferrazzano (CB)

A magnitude ML 1.1 earthquake occured in region: 2 km E Ferrazzano (CB), on

  • 20-01-2021 06:34:54 (UTC)
  • 20-01-2021 07:34:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.5280, 14.6910 at 14 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
Ferrazzano CB 2 3344 3344
Mirabello Sannitico CB 2 2180 5524
Campobasso CB 4 49431 54955
Gildone CB 5 809 55764
Campodipietra CB 6 2570 58334
Cercepiccola CB 8 681 59015
Cercemaggiore CB 8 3777 62792
Toro CB 8 1391 64183
San Giovanni in Galdo CB 8 580 64763
Jelsi CB 9 1781 66544
San Giuliano del Sannio CB 9 1029 67573
Vinchiaturo CB 9 3324 70897
Matrice CB 10 1115 72012
Ripalimosani CB 10 3114 75126
Baranello CB 11 2673 77799
Oratino CB 11 1641 79440
Busso CB 11 1273 80713
Riccia CB 13 5262 85975
Montagano CB 13 1086 87061
Monacilioni CB 14 523 87584
Campolieto CB 14 839 88423
Colle d'Anchise CB 15 807 89230
Sepino CB 15 1964 91194
Casalciprano CB 15 564 91758
Castropignano CB 15 947 92705
Santa Croce del Sannio BN 16 927 93632
Guardiaregia CB 16 801 94433
Pietracatella CB 16 1375 95808
Castelpagano BN 17 1483 97291
Spinete CB 17 1320 98611
Sassinoro BN 17 618 99229
Limosano CB 18 768 99997
Campochiaro CB 18 646 100643
San Polo Matese CB 18 470 101113
Petrella Tifernina CB 18 1170 102283
Sant'Elia a Pianisi CB 19 1818 104101
Gambatesa CB 19 1464 105565
Torella del Sannio CB 19 795 106360
Bojano CB 19 8058 114418
Sant'Elena Sannita IS 19 275 114693
Castellino del Biferno CB 20 545 115238
Sant'Angelo Limosano CB 20 352 115590
Macchia Valfortore CB 20 576 116166
Molise CB 20 167 116333

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km N of Benevento (60091 inhabitants)
59 Km NE of Caserta (76326 inhabitants)
60 Km W of San Severo (53905 inhabitants)
69 Km N of Avellino (54857 inhabitants)
70 Km NE of Acerra (59573 inhabitants)
71 Km W of Foggia (151991 inhabitants)
74 Km NE of Aversa (53047 inhabitants)
74 Km NE of Afragola (65057 inhabitants)
77 Km NE of Casoria (77642 inhabitants)
78 Km NE of Giugliano in Campania (122974 inhabitants)
82 Km NE of Marano di Napoli (59874 inhabitants)
83 Km NE of Portici (55274 inhabitants)
85 Km NE of Napoli (974074 inhabitants)
85 Km NE of Ercolano (53709 inhabitants)
87 Km NE of Torre del Greco (86275 inhabitants)
88 Km N of Scafati (50787 inhabitants)
91 Km NE of Pozzuoli (81661 inhabitants)
92 Km N of Cava de' Tirreni (53659 inhabitants)
94 Km N of Castellammare di Stabia (66466 inhabitants)
95 Km N of Salerno (135261 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 1.1 2021-01-20
06:34:54		 41.5285 14.6912 15 2021-07-12
16:55:01		 Bollettino Sismico Italiano INGV 87945421
Reviewed
Rev100 		ML 1.0 2021-01-20
06:34:54		 41.5372 14.6803 10 2021-01-20
06:43:41		 Sala Sismica INGV-Roma 86391711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-20 06:34:54 ± 0.14
Latitude 41.5285 ± 0.0072
Longitude 14.6912 ± 0.0096
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87945421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 840
Semi-minor axis of confidence ellipse (meter) 123
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 71
Circular confidence region, given by single value of horizontal uncertainty (meter) 840.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
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) 0.07464
Epicentral distance of station farthest from the epicenter (degree) 0.43887
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 87945421
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-09 14:47:19

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 86391711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-20 06:43:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RNI2.HNE. 2021-01-20T06:35:11.13 0.6 undecidable manual S 294 48.7179 96 0.83 36
IV.MELA.HHZ. 2021-01-20T06:35:09.12 0.6 undecidable manual S 61 41.1255 97 0.82 38
IV.VAGA.HHZ. 2021-01-20T06:35:08.64 0.6 undecidable manual S 252 40.0266 97 0.65 41
IV.VITU.HHZ. 2021-01-20T06:35:07.63 0.6 undecidable manual S 188 38.628 98 0 47
IV.MIDA.HNZ. 2021-01-20T06:35:07.42 0.6 undecidable manual S 289 38.3283 98 -0.14 47
IV.SGG.HHZ. 2021-01-20T06:35:06.05 0.3 undecidable manual S 239 30.3474 101 0.61 64
IV.TRIV.HHZ. 2021-01-20T06:35:05.63 0.3 undecidable manual S 336 28.8489 102 0.57 63
IV.RNI2.HNE. 2021-01-20T06:35:03.22 0.3 undecidable manual P 294 48.7179 96 -0.53 64
IV.VAGA.HHZ. 2021-01-20T06:35:02.19 0.6 undecidable manual P 252 40.0266 97 -0.23 46
IV.MELA.HHZ. 2021-01-20T06:35:02.27 0.1 undecidable manual P 61 41.1255 97 -0.33 90
IV.PSB1.HHZ. 2021-01-20T06:35:01.79 0.3 undecidable manual P 164 35.2425 99 0.09 72
IV.MIDA.HNZ. 2021-01-20T06:35:01.76 0.3 undecidable manual P 289 38.3283 98 -0.41 67
IV.SACR.HHZ. 2021-01-20T06:35:01.90 0.3 undecidable manual S 175 14.5743 123 0.4 71
IV.VITU.HHZ. 2021-01-20T06:35:01.71 0.3 undecidable manual P 188 38.628 98 -0.5 64
IV.CIGN.HHZ. 2021-01-20T06:35:00.07 0.3 undecidable manual P 52 22.5552 108 0.28 70
IV.TRIV.HHZ. 2021-01-20T06:35:00.59 0.1 undecidable manual P 336 28.8489 102 -0.14 96
IV.SGG.HHZ. 2021-01-20T06:35:00.68 0.1 undecidable manual P 239 30.3474 101 -0.27 92
IV.BSSO.HHZ. 2021-01-20T06:34:59.90 0.6 undecidable manual S 284 8.2806 143 -0.37 47
IV.SACR.HHZ. 2021-01-20T06:34:58.73 0.1 undecidable manual P 175 14.5743 123 0.06 100
IV.BSSO.HHZ. 2021-01-20T06:34:57.66 0.1 undecidable manual P 284 8.2806 143 -0.3 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BSSO.HHE. ML:1.2 0.000161 0.54 AML other m 2021-01-20T06:35:00.45
IV.BSSO.HHN. ML:1.1 0.000145 0.5 AML other m 2021-01-20T06:35:00.82
IV.SACR.HHE. ML:1.1 0.00011015 0.42 AML other m 2021-01-20T06:35:02.22
IV.SACR.HHN. ML:1.0 0.00008555 1.22 AML other m 2021-01-20T06:35:03.22
IV.SGG.HHE. ML:1.0 0.0000383 0.48 AML other m 2021-01-20T06:35:07.16
IV.SGG.HHN. ML:0.9 0.00003345 1.46 AML other m 2021-01-20T06:35:08.16
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