Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.1 on date 09-04-1998 and time 18:19:41 (Italy) in region 4 km S Montaquila (IS)

A magnitude Md 2.1 earthquake occured in region: 4 km S Montaquila (IS), on

  • 09-04-1998 16:19:41 (UTC)
  • 09-04-1998 18:19:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.5340, 14.1150 at 12 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
Montaquila IS 4 2456 2456
Filignano IS 5 648 3104
Pozzilli IS 5 2380 5484
Monteroduni IS 5 2264 7748
Macchia d'Isernia IS 6 1035 8783
Colli a Volturno IS 7 1349 10132
Capriati a Volturno CE 8 1541 11673
Venafro IS 8 11280 22953
Fornelli IS 9 1909 24862
Sant'Agapito IS 9 1496 26358
Conca Casale IS 10 200 26558
Ciorlano CE 10 426 26984
Scapoli IS 10 680 27664
Fontegreca CE 10 811 28475
Rocchetta a Volturno IS 10 1113 29588
Longano IS 11 690 30278
Isernia IS 11 21842 52120
Gallo Matese CE 12 579 52699
Viticuso FR 12 353 53052
Sesto Campano IS 13 2388 55440
Prata Sannita CE 13 1502 56942
Acquafondata FR 14 263 57205
Cerro al Volturno IS 14 1281 58486
Castel San Vincenzo IS 14 516 59002
Pettoranello del Molise IS 14 460 59462
Letino CE 14 712 60174
Castelpizzuto IS 15 155 60329
Pratella CE 15 1565 61894
Acquaviva d'Isernia IS 16 425 62319
Pizzone IS 16 329 62648
San Pietro Infine CE 16 944 63592
Pesche IS 16 1661 65253
Miranda IS 17 1047 66300
San Vittore del Lazio FR 17 2636 68936
Valle Agricola CE 17 890 69826
Vallerotonda FR 17 1581 71407
Ailano CE 18 1369 72776
Presenzano CE 18 1766 74542
Mignano Monte Lungo CE 18 3250 77792
San Biagio Saracinisco FR 18 349 78141
Cervaro FR 18 8109 86250
Carpinone IS 19 1157 87407
Forlì del Sannio IS 19 675 88082
Castelpetroso IS 20 1680 89762
Rionero Sannitico IS 20 1118 90880

Municipalities with at least 50000 inhabitants

An earthquake occurred to
54 Km NW of Caserta (76326 inhabitants)
63 Km N of Aversa (53047 inhabitants)
68 Km N of Giugliano in Campania (122974 inhabitants)
69 Km NW of Acerra (59573 inhabitants)
70 Km N of Afragola (65057 inhabitants)
71 Km N of Marano di Napoli (59874 inhabitants)
71 Km N of Casoria (77642 inhabitants)
72 Km NW of Benevento (60091 inhabitants)
76 Km N of Pozzuoli (81661 inhabitants)
78 Km N of Napoli (974074 inhabitants)
81 Km N of Portici (55274 inhabitants)
83 Km N of Ercolano (53709 inhabitants)
86 Km N of Torre del Greco (86275 inhabitants)
89 Km NW of Avellino (54857 inhabitants)
91 Km S of Chieti (51815 inhabitants)
94 Km NW of Scafati (50787 inhabitants)
98 Km NW 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 		Md 2.1 1998-04-09
16:19:41		 41.534 14.115 12 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 333229
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1998-04-09 16:19:41 ± 0.34
Latitude 41.5340 ± 0.0236
Longitude 14.1150 ± 0.0083
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 333229

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 2710.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 195
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00032
Epicentral distance of station farthest from the epicenter (degree) 0.00251
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 333229
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:12:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.SDI.Z. 1998-04-09T16:19:53.30 10.0 undecidable manual SG 307 0.2775 -0.02 0.7
--.CPI2.Z. 1998-04-09T16:19:48.84 10.0 undecidable manual SG 71 0.1554 -0.22 0.4
--.SDI.Z. 1998-04-09T16:19:48.15 10.0 undecidable manual PG 307 0.2775 -0.18 1.1
--.CRVI.Z. 1998-04-09T16:19:47.89 10.0 undecidable manual PG 36 0.2331 0.49 0.6
--.PLI2.Z. 1998-04-09T16:19:46.80 10.0 undecidable manual SG 266 0.0333 -0.12 0.9
--.CPI2.Z. 1998-04-09T16:19:45.92 10.0 undecidable manual PG 71 0.1554 -0.11 1.6
--.PLI2.Z. 1998-04-09T16:19:44.52 10.0 undecidable manual PG 266 0.0333 0.15 1.9
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