Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 18-09-2020 and time 00:21:16 (UTC) in region 2 km W Colli a Volturno (IS)

A magnitude ML 1.3 earthquake occured in region: 2 km W Colli a Volturno (IS), on

  • 18-09-2020 00:21:16 (UTC)
  • 18-09-2020 02:21:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.5920, 14.0790 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
Colli a Volturno IS 2 1349 1349
Scapoli IS 3 680 2029
Rocchetta a Volturno IS 4 1113 3142
Montaquila IS 4 2456 5598
Filignano IS 5 648 6246
Fornelli IS 6 1909 8155
Castel San Vincenzo IS 7 516 8671
Cerro al Volturno IS 7 1281 9952
Macchia d'Isernia IS 8 1035 10987
Pozzilli IS 9 2380 13367
Pizzone IS 9 329 13696
Acquaviva d'Isernia IS 11 425 14121
Monteroduni IS 11 2264 16385
Viticuso FR 12 353 16738
Acquafondata FR 12 263 17001
Venafro IS 12 11280 28281
Isernia IS 12 21842 50123
Conca Casale IS 12 200 50323
San Biagio Saracinisco FR 13 349 50672
Sant'Agapito IS 13 1496 52168
Montenero Val Cocchiara IS 14 538 52706
Rionero Sannitico IS 14 1118 53824
Forlì del Sannio IS 14 675 54499
Vallerotonda FR 14 1581 56080
Capriati a Volturno CE 15 1541 57621
Miranda IS 15 1047 58668
Longano IS 16 690 59358
Alfedena AQ 16 864 60222
Pettoranello del Molise IS 17 460 60682
Ciorlano CE 17 426 61108
Pesche IS 17 1661 62769
Fontegreca CE 17 811 63580
Scontrone AQ 18 574 64154
Roccasicura IS 18 550 64704
San Vittore del Lazio FR 18 2636 67340
Sant'Elia Fiumerapido FR 19 6166 73506
Picinisco FR 19 1218 74724
Gallo Matese CE 19 579 75303
Sesto Campano IS 19 2388 77691
Cervaro FR 19 8109 85800
San Pietro Infine CE 19 944 86744
Castelpizzuto IS 20 155 86899
Barrea AQ 20 726 87625

Municipalities with at least 50000 inhabitants

An earthquake occurred to
61 Km NW of Caserta (76326 inhabitants)
70 Km N of Aversa (53047 inhabitants)
74 Km N of Giugliano in Campania (122974 inhabitants)
76 Km NW of Acerra (59573 inhabitants)
77 Km N of Afragola (65057 inhabitants)
78 Km N of Marano di Napoli (59874 inhabitants)
78 Km NW of Benevento (60091 inhabitants)
78 Km N of Casoria (77642 inhabitants)
83 Km N of Pozzuoli (81661 inhabitants)
85 Km S of Chieti (51815 inhabitants)
85 Km N of Napoli (974074 inhabitants)
88 Km N of Portici (55274 inhabitants)
90 Km N of Ercolano (53709 inhabitants)
93 Km N of Torre del Greco (86275 inhabitants)
96 Km NW of Avellino (54857 inhabitants)
98 Km S of Pescara (121014 inhabitants)
99 Km E of Latina (125985 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 2020-09-18
00:21:16		 41.5923 14.0787 11 2021-02-26
14:56:20		 Bollettino Sismico Italiano INGV 87375231
Reviewed
Rev100 		ML 1.3 2020-09-18
00:21:17		 41.5748 14.0878 8 2020-09-18
00:41:20		 Sala Sismica INGV-Roma 82995181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-18 00:21:16 ± 0.09
Latitude 41.5923 ± 0.0054
Longitude 14.0787 ± 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 87375231

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 617
Semi-minor axis of confidence ellipse (meter) 154
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 23
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.43887
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 87375231
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-22 10:12:46

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 82995181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-18 00:41:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTGR.HHZ. 2020-09-18T00:23:15.71 3.0 undecidable manual Sg 4.99 0
CR.ZAG.BHZ. 2020-09-18T00:23:06.08 3.0 undecidable manual Sn -0.65 0
IV.MESG.HHZ. 2020-09-18T00:22:41.02 3.0 undecidable manual Sg 3.04 0
IV.ARCI.HHZ. 2020-09-18T00:22:31.24 3.0 undecidable manual Sg 5.18 0
IV.RESU.HHZ. 2020-09-18T00:22:25.73 3.0 undecidable manual Pg 5.48 0
IV.ARCI.HHZ. 2020-09-18T00:21:54.61 3.0 undecidable manual Pg 0.15 0
IV.ARRO.EHZ. 2020-09-18T00:21:51.18 3.0 undecidable manual Sn -9.99 0
IV.T0110.HHZ. 2020-09-18T00:21:39.60 3.0 undecidable manual Sg 2.19 0
IV.GAVE.EHZ. 2020-09-18T00:21:36.04 3.0 undecidable manual Pn -4.64 0
IV.INTR.HHE. 2020-09-18T00:21:32.32 0.6 undecidable manual S 343 48.7179 90 0.24 44
IV.VVLD.HHZ. 2020-09-18T00:21:31.76 0.6 undecidable manual S 309 48.618 90 -0.31 44
IV.LRP.EHN. 2020-09-18T00:21:30.34 0.6 undecidable manual S 279 41.2254 90 0.24 45
IV.POFI.HNE. 2020-09-18T00:21:27.95 0.6 undecidable manual S 295 33.4443 90 -0.05 48
IT.OPI.HGE. 2020-09-18T00:21:26.38 0.6 undecidable manual S 315 28.9488 90 -0.44 44
IV.MCI.EHE. 2020-09-18T00:21:26.08 0.3 undecidable manual S 243 24.753 90 0.39 67
IV.VVLD.HHZ. 2020-09-18T00:21:25.09 0.1 undecidable manual P 309 48.618 90 -0.46 85
IV.INTR.HHE. 2020-09-18T00:21:25.35 0.1 undecidable manual P 343 48.7179 90 -0.2 90
IV.VAGA.HHZ. 2020-09-18T00:21:24.67 0.6 undecidable manual S 147 23.4543 90 -0.69 40
IV.LRP.EHN. 2020-09-18T00:21:24.85 0.3 undecidable manual P 279 41.2254 90 0.44 65
IV.MIDA.HHZ. 2020-09-18T00:21:23.10 0.3 undecidable manual S 69 15.5733 90 -0.14 71
IV.RNI2.HHZ. 2020-09-18T00:21:23.22 0.3 undecidable manual S 26 13.7751 92 0.47 68
IV.PTRJ.HNZ. 2020-09-18T00:21:23.32 3.0 undecidable manual P -2.97 0
IT.OPI.HGE. 2020-09-18T00:21:22.21 0.3 undecidable manual P 315 28.9488 90 -0.3 68
IV.MCI.EHE. 2020-09-18T00:21:22.06 0.3 undecidable manual P 243 24.753 90 0.2 70
IV.POFI.HNE. 2020-09-18T00:21:22.97 0.1 undecidable manual P 295 33.4443 90 -0.22 92
IV.VAGA.HHZ. 2020-09-18T00:21:21.85 0.1 undecidable manual P 147 23.4543 90 0.18 95
IV.MIDA.HHZ. 2020-09-18T00:21:20.59 0.1 undecidable manual P 69 15.5733 90 0.15 97
IV.RNI2.HHZ. 2020-09-18T00:21:20.60 0.1 positive manual P 26 13.7751 92 0.44 91
IV.CERA.HHZ. 2020-09-18T00:21:20.63 0.1 undecidable manual S 277 4.995 147 -0.23 95
IV.CERA.HHZ. 2020-09-18T00:21:19.07 0.1 undecidable manual P 277 4.995 147 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MIDA.HHE. ML:1.3 0.00016350000000000002 0.32 AML other m 2020-09-18T00:21:24.41
IV.MIDA.HHN. ML:1.2 0.0001565 0.5 AML other m 2020-09-18T00:21:24.25
IV.RNI2.HHN. ML:1.4 0.0002255 0.16 AML other m 2020-09-18T00:21:25.69
IV.RNI2.HNN. ML:1.3 0.00021500000000000002 0.18 AML other m 2020-09-18T00:21:25.70
IV.RNI2.HHE. ML:1.3 0.00020050000000000002 1.32 AML other m 2020-09-18T00:21:25.28
IV.RNI2.HNE. ML:1.3 0.00019649999999999998 1.32 AML other m 2020-09-18T00:21:25.28
IV.VAGA.HHE. ML:1.2 0.0000998 0.26 AML other m 2020-09-18T00:21:28.30
IV.VAGA.HHN. ML:1.3 0.00012415 0.96 AML other m 2020-09-18T00:21:30.15
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