Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 22-04-2021 and time 23:17:40 (UTC) in region 2 km NW Gambatesa (CB)

A magnitude ML 0.8 earthquake occured in region: 2 km NW Gambatesa (CB), on

  • 22-04-2021 23:17:40 (UTC)
  • 23-04-2021 01:17:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.5190, 14.9000 at 19 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
Gambatesa CB 2 1464 1464
Tufara CB 6 925 2389
Riccia CB 6 5262 7651
Pietracatella CB 7 1375 9026
Celenza Valfortore FG 8 1598 10624
Macchia Valfortore CB 9 576 11200
Jelsi CB 9 1781 12981
San Marco la Catola FG 9 1012 13993
Castelvetere in Val Fortore BN 9 1240 15233
Carlantino FG 11 980 16213
Sant'Elia a Pianisi CB 12 1818 18031
Monacilioni CB 13 523 18554
Toro CB 13 1391 19945
Volturara Appula FG 13 430 20375
Gildone CB 13 809 21184
Campodipietra CB 13 2570 23754
Baselice BN 15 2397 26151
San Giovanni in Galdo CB 15 580 26731
Castelpagano BN 15 1483 28214
San Bartolomeo in Galdo BN 15 4867 33081
Cercemaggiore CB 16 3777 36858
Campolieto CB 17 839 37697
Colletorto CB 17 1938 39635
Motta Montecorvino FG 18 730 40365
Colle Sannita BN 18 2431 42796
Matrice CB 19 1115 43911
Mirabello Sannitico CB 19 2180 46091
Ferrazzano CB 19 3344 49435
Volturino FG 19 1743 51178
Pietramontecorvino FG 19 2721 53899
Foiano di Val Fortore BN 19 1410 55309
San Giuliano di Puglia CB 19 1042 56351
Circello BN 20 2388 58739
Castelnuovo della Daunia FG 20 1445 60184
Casalvecchio di Puglia FG 20 1877 62061

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of San Severo (53905 inhabitants)
44 Km N of Benevento (60091 inhabitants)
54 Km W of Foggia (151991 inhabitants)
68 Km N of Avellino (54857 inhabitants)
68 Km NE of Caserta (76326 inhabitants)
77 Km NE of Acerra (59573 inhabitants)
83 Km NE of Afragola (65057 inhabitants)
84 Km NE of Aversa (53047 inhabitants)
85 Km NE of Casoria (77642 inhabitants)
86 Km W of Manfredonia (57279 inhabitants)
88 Km NE of Giugliano in Campania (122974 inhabitants)
88 Km W of Cerignola (58396 inhabitants)
90 Km NE of Portici (55274 inhabitants)
91 Km NE of Marano di Napoli (59874 inhabitants)
91 Km NE of Scafati (50787 inhabitants)
91 Km NE of Ercolano (53709 inhabitants)
92 Km N of Cava de' Tirreni (53659 inhabitants)
93 Km NE of Torre del Greco (86275 inhabitants)
93 Km NE of Napoli (974074 inhabitants)
94 Km N of Salerno (135261 inhabitants)
98 Km NE of Castellammare di Stabia (66466 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 0.8 2021-04-22
23:17:40		 41.5187 14.8998 19 2021-07-12
16:55:16		 Bollettino Sismico Italiano INGV 91712701
Reviewed
Rev100 		ML 0.8 2021-04-22
23:17:39		 41.5353 14.8757 22 2021-04-22
23:29:20		 Sala Sismica INGV-Roma 89376241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-22 23:17:40 ± 0.13
Latitude 41.5187 ± 0.0063
Longitude 14.8998 ± 0.0072
Depth (km) 19 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91712701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 734
Semi-minor axis of confidence ellipse (meter) 485
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 150
Circular confidence region, given by single value of horizontal uncertainty (meter) 730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.67269
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 89376241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-22 23:29:20

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 91712701
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-22 14:35:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTRZ.HHZ. 2021-04-22T23:19:24.06 3.0 undecidable manual Sg 11.1 0
IV.SEI.HHZ. 2021-04-22T23:19:09.06 3.0 undecidable manual Sn 0.16 0
IV.ZONE.HHZ. 2021-04-22T23:19:07.91 3.0 positive manual Pg 14.51 0
IV.MCPD.HHZ. 2021-04-22T23:18:29.68 3.0 positive manual Pg 6.83 0
IV.ATFO.HHZ. 2021-04-22T23:18:13.95 3.0 positive manual Pg 1.33 0
MN.CUC.HHZ. 2021-04-22T23:18:01.22 3.0 negative manual P -0.27 0
OT.OT04.EHE. 2021-04-22T23:17:59.00 0.6 undecidable manual S 68 60.6948 99 0.07 62
OT.OT05.EHZ. 2021-04-22T23:17:59.10 0.6 undecidable manual S 75 60.2952 99 0.26 60
IV.SGRT.HHZ. 2021-04-22T23:17:53.57 0.3 undecidable manual P 69 74.6697 97 0.46 84
IV.PSB1.HHZ. 2021-04-22T23:17:52.21 0.6 undecidable manual S 193 33.5442 110 0.31 61
IV.BSSO.HHZ. 2021-04-22T23:17:50.37 0.3 undecidable manual S 277 25.5522 117 0.42 91
IV.APRC.HHN. 2021-04-22T23:17:50.99 0.3 undecidable manual P 63 59.496 100 0.2 91
OT.OT05.EHZ. 2021-04-22T23:17:50.61 0.3 undecidable manual P 75 60.2952 99 -0.31 86
IV.VAGA.HNZ. 2021-04-22T23:17:50.18 0.3 undecidable manual P 259 56.499 100 -0.16 91
IV.MELA.HHZ. 2021-04-22T23:17:50.50 0.6 undecidable manual S 42 28.0497 115 -0.03 64
OT.OT04.EHE. 2021-04-22T23:17:50.95 0.3 undecidable manual P 68 60.6948 99 -0.02 92
IV.SACR.HHZ. 2021-04-22T23:17:49.33 0.6 undecidable manual S 230 21.0678 124 0.44 61
IV.SGG.HNZ. 2021-04-22T23:17:48.67 0.3 undecidable manual P 251 45.7209 103 -0.04 95
IV.CIGN.HHZ. 2021-04-22T23:17:47.41 0.6 undecidable manual S 2 15.0738 135 -0.24 63
IV.VITU.HHZ. 2021-04-22T23:17:47.96 1.0 undecidable manual P 211 43.4232 104 -0.41 29
IV.PSB1.HHZ. 2021-04-22T23:17:46.63 0.3 undecidable manual P 193 33.5442 110 -0.28 92
IV.SACR.HHZ. 2021-04-22T23:17:45.05 0.3 undecidable manual P 230 21.0678 124 -0.13 98
IV.MELA.HHZ. 2021-04-22T23:17:45.65 0.1 undecidable manual P 42 28.0497 115 -0.47 88
IV.BSSO.HHZ. 2021-04-22T23:17:45.77 0.3 undecidable manual P 277 25.5522 117 -0.01 99
IV.CIGN.HHZ. 2021-04-22T23:17:44.45 0.3 undecidable manual P 2 15.0738 135 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACR.HHN. ML:0.4 0.000016556741 0.1792 AML other m 2021-04-22T23:17:49.97
IV.MELA.HHE. ML:1.0 0.000051726465 0.256 AML other m 2021-04-22T23:17:51.18
IV.BSSO.HHE. ML:0.8 0.000032351394999999996 0.2944 AML other m 2021-04-22T23:17:51.08
IV.BSSO.HHN. ML:0.9 0.0000347007 0.0896 AML other m 2021-04-22T23:17:51.89
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