Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 17-04-1997 and time 22:20:25 (UTC) in region 2 km NW Sepino (CB)

A magnitude Md 2.5 earthquake occured in region: 2 km NW Sepino (CB), on

  • 17-04-1997 22:20:25 (UTC)
  • 18-04-1997 00:20:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.4180, 14.6060 at 5 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
Sepino CB 2 1964 1964
San Giuliano del Sannio CB 5 1029 2993
Guardiaregia CB 6 801 3794
Sassinoro BN 7 618 4412
Cercepiccola CB 7 681 5093
Vinchiaturo CB 9 3324 8417
Pietraroja BN 9 545 8962
Campochiaro CB 9 646 9608
Morcone BN 10 4932 14540
San Polo Matese CB 10 470 15010
Cercemaggiore CB 11 3777 18787
Santa Croce del Sannio BN 11 927 19714
Cusano Mutri BN 12 4091 23805
Mirabello Sannitico CB 12 2180 25985
Colle d'Anchise CB 13 807 26792
Baranello CB 13 2673 29465
Bojano CB 13 8058 37523
Ferrazzano CB 14 3344 40867
Gildone CB 15 809 41676
Cerreto Sannita BN 15 3940 45616
Busso CB 16 1273 46889
Pontelandolfo BN 16 2167 49056
Campobasso CB 16 49431 98487
San Lorenzello BN 17 2227 100714
Castelpagano BN 17 1483 102197
Spinete CB 17 1320 103517
San Lupo BN 18 801 104318
Campolattaro BN 18 1072 105390
Guardia Sanframondi BN 18 5078 110468
Circello BN 18 2388 112856
San Massimo CB 18 855 113711
Faicchio BN 19 3634 117345
San Lorenzo Maggiore BN 19 2154 119499
Gioia Sannitica CE 19 3638 123137
Oratino CB 19 1641 124778
Casalduni BN 19 1378 126156
Casalciprano CB 19 564 126720
Jelsi CB 20 1781 128501
Campodipietra CB 20 2570 131071
San Gregorio Matese CE 20 988 132059
San Potito Sannitico CE 20 1925 133984
Castello del Matese CE 20 1494 135478
Colle Sannita BN 20 2431 137909

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km NW of Benevento (60091 inhabitants)
44 Km NE of Caserta (76326 inhabitants)
56 Km NE of Acerra (59573 inhabitants)
58 Km N of Avellino (54857 inhabitants)
60 Km NE of Aversa (53047 inhabitants)
60 Km NE of Afragola (65057 inhabitants)
63 Km NE of Casoria (77642 inhabitants)
64 Km NE of Giugliano in Campania (122974 inhabitants)
67 Km NE of Marano di Napoli (59874 inhabitants)
69 Km NE of Portici (55274 inhabitants)
71 Km NE of Napoli (974074 inhabitants)
71 Km NE of Ercolano (53709 inhabitants)
71 Km W of San Severo (53905 inhabitants)
73 Km N of Torre del Greco (86275 inhabitants)
75 Km N of Scafati (50787 inhabitants)
77 Km NE of Pozzuoli (81661 inhabitants)
78 Km W of Foggia (151991 inhabitants)
80 Km N of Cava de' Tirreni (53659 inhabitants)
81 Km N of Castellammare di Stabia (66466 inhabitants)
83 Km N of Salerno (135261 inhabitants)
95 Km NW of Battipaglia (50786 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 2.5 1997-04-17
22:20:25		 41.418 14.606 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 266199
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-04-17 22:20:25 ± 0.172
Latitude 41.4180 ± 0.0171
Longitude 14.6060 ± 0.0149
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 266199

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) 2273.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 129
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) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00073
Epicentral distance of station farthest from the epicenter (degree) 0.00907
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 266199
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:11:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.SGO.Z. 1997-04-17T22:20:45.35 10.0 undecidable manual PG 148 1.0101 -0.09 1
--.SDI.Z. 1997-04-17T22:20:38.32 10.0 undecidable manual PG 296 0.6549 -0.72 0.3
--.FG5.Z. 1997-04-17T22:20:36.78 10.0 undecidable manual PG 105 0.5106 0.48 0.8
--.RFI.Z. 1997-04-17T22:20:36.70 10.0 undecidable manual PG 256 0.4773 0.4 1
--.DUI.Z. 1997-04-17T22:20:31.44 10.0 undecidable manual PG 335 0.2553 0.36 1.1
--.SMB1.Z. 1997-04-17T22:20:29.10 10.0 undecidable manual SG 105 0.0777 0.12 0.6
--.SMB1.Z. 1997-04-17T22:20:26.91 10.0 negative manual PG 105 0.0777 -0.38 2.2
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