Earthquake with magnitude of ML 0.9 on date 18-09-2020 and time 01:24:51 (Italy) in region 3 km W Montaquila (IS)

A magnitude ML 0.9 earthquake occured in region: 3 km W Montaquila (IS), on

  • 17-09-2020 23:24:51 (UTC)
  • 18-09-2020 01:24:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.58, 14.08 at 9 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Montaquila IS 3 2456 2456
Colli a Volturno IS 3 1349 3805
Filignano IS 4 648 4453
Scapoli IS 5 680 5133
Rocchetta a Volturno IS 6 1113 6246
Fornelli IS 6 1909 8155
Pozzilli IS 7 2380 10535
Macchia d'Isernia IS 7 1035 11570
Cerro al Volturno IS 9 1281 12851
Castel San Vincenzo IS 9 516 13367
Monteroduni IS 10 2264 15631
Venafro IS 10 11280 26911
Viticuso FR 11 353 27264
Conca Casale IS 11 200 27464
Pizzone IS 11 329 27793
Acquafondata FR 11 263 28056
Isernia IS 12 21842 49898
Sant'Agapito IS 12 1496 51394
Acquaviva d'Isernia IS 12 425 51819
Capriati a Volturno CE 13 1541 53360
San Biagio Saracinisco FR 13 349 53709
Vallerotonda FR 14 1581 55290
Longano IS 15 690 55980
Ciorlano CE 15 426 56406
Fontegreca CE 16 811 57217
Montenero Val Cocchiara IS 16 538 57755
Miranda IS 16 1047 58802
Forlì del Sannio IS 16 675 59477
Rionero Sannitico IS 16 1118 60595
Pettoranello del Molise IS 16 460 61055
Sesto Campano IS 17 2388 63443
San Vittore del Lazio FR 17 2636 66079
Gallo Matese CE 17 579 66658
Pesche IS 17 1661 68319
San Pietro Infine CE 18 944 69263
Cervaro FR 18 8109 77372
Alfedena AQ 18 864 78236
Sant'Elia Fiumerapido FR 18 6166 84402
Roccasicura IS 19 550 84952
Castelpizzuto IS 19 155 85107
Prata Sannita CE 19 1502 86609
Scontrone AQ 19 574 87183
Picinisco FR 19 1218 88401
Letino CE 20 712 89113

Municipalities with at least 50000 inhabitants

An earthquake occurred to
59 Km NW of Caserta (76326 inhabitants)
68 Km N of Aversa (53047 inhabitants)
73 Km N of Giugliano in Campania (122974 inhabitants)
74 Km NW of Acerra (59573 inhabitants)
75 Km N of Afragola (65057 inhabitants)
76 Km N of Marano di Napoli (59874 inhabitants)
76 Km N of Casoria (77642 inhabitants)
77 Km NW of Benevento (60091 inhabitants)
81 Km N of Pozzuoli (81661 inhabitants)
83 Km N of Napoli (974074 inhabitants)
87 Km N of Portici (55274 inhabitants)
87 Km S of Chieti (51815 inhabitants)
88 Km N of Ercolano (53709 inhabitants)
91 Km N of Torre del Greco (86275 inhabitants)
95 Km NW of Avellino (54857 inhabitants)
99 Km E of Latina (125985 inhabitants)
99 Km NW of Scafati (50787 inhabitants)
100 Km S of Pescara (121014 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.9 2020-09-17
23:24:51
41.58 14.08 9 2020-09-17
23:33:48
Sala Sismica INGV-Roma 82993641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-17 23:24:51 ± 0.21
Latitude 41.58 ± 0.01
Longitude 14.08 ± 0.01
Depth (km) 9 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82993641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1189
Semi-minor axis of confidence ellipse (meter) 814
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 322
Circular confidence region, given by single value of horizontal uncertainty (meter) 1190
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 152
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.29228
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 82993641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-17 23:33:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PANTE.HHZ. 2020-09-17T23:26:45.39 3.0 undecidable manual Sn -9.99 0
MN.CLTB.HHZ. 2020-09-17T23:26:39.63 3.0 undecidable manual Sg 5.07 0
IV.FIR.HHZ. 2020-09-17T23:26:21.41 3.0 undecidable manual Sg 2.77 0
IV.APEC.HHZ. 2020-09-17T23:25:57.98 3.0 undecidable manual Sn -4.18 0
IV.TREM.HHZ. 2020-09-17T23:25:32.03 3.0 undecidable manual Sg -0.62 0
IV.INTR.HHZ. 2020-09-17T23:24:59.91 3.0 positive manual P -1.68 0
IV.SGG.HHZ. 2020-09-17T23:24:57.74 0.3 undecidable manual P 130 0.2923 50 -0.14 71
IV.RNI2.HHZ. 2020-09-17T23:24:57.68 0.3 undecidable manual S 23 0.1385 120 0.35 70
IV.MIDA.HHZ. 2020-09-17T23:24:57.20 0.3 undecidable manual S 63 0.1457 119 -0.37 70
IV.IOCA.HHZ. 2020-09-17T23:24:56.62 3.0 undecidable manual P -4.48 0
IV.VAGA.HHE. 2020-09-17T23:24:56.23 0.3 undecidable manual P 144 0.197 112 0.33 70
IV.MIDA.HHZ. 2020-09-17T23:24:54.92 0.3 negative manual P 63 0.1457 119 0.06 74
IV.CERA.HHZ. 2020-09-17T23:24:54.74 0.3 undecidable manual S 296 0.0513 147 -0.08 75
IV.RNI2.HHZ. 2020-09-17T23:24:54.70 0.3 undecidable manual P 23 0.1385 120 -0.02 75
IV.CERA.HHZ. 2020-09-17T23:24:53.17 0.1 undecidable manual P 296 0.0513 147 -0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CERA.HHN. ML:1 0.0001705 1.36 AML other m 2020-09-17T23:24:55.12
IV.CERA.HHE. ML:0.8 0.0001055 1.12 AML other m 2020-09-17T23:24:55.83
IV.FIR.HHE. ML:3.3 0.00018 0.74 AML other m 2020-09-17T23:26:26.00
IV.FIR.HHN. ML:3.3 0.0002035 0.08 AML other m 2020-09-17T23:26:29.03
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download