Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.4 on date 18-02-1997 and time 22:21:39 (Italy) in region 2 km SE San Pietro Avellana (IS)

A magnitude Md 2.4 earthquake occured in region: 2 km SE San Pietro Avellana (IS), on

  • 18-02-1997 21:21:39 (UTC)
  • 18-02-1997 22:21:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.7790, 14.2060 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
San Pietro Avellana IS 2 503 503
Vastogirardi IS 5 704 1207
Capracotta IS 8 903 2110
Castel di Sangro AQ 8 6538 8648
Ateleta AQ 9 1181 9829
Castel del Giudice IS 9 346 10175
Roccasicura IS 9 550 10725
Rionero Sannitico IS 9 1118 11843
Forlì del Sannio IS 9 675 12518
Carovilli IS 10 1359 13877
Sant'Angelo del Pesco IS 12 364 14241
Acquaviva d'Isernia IS 13 425 14666
Roccaraso AQ 13 1627 16293
Pescopennataro IS 13 285 16578
Montenero Val Cocchiara IS 14 538 17116
Agnone IS 14 5139 22255
Gamberale CH 14 320 22575
Scontrone AQ 14 574 23149
Alfedena AQ 15 864 24013
Miranda IS 15 1047 25060
Rivisondoli AQ 15 700 25760
Pescolanciano IS 16 855 26615
Pietrabbondante IS 16 759 27374
Castelverrino IS 16 115 27489
Cerro al Volturno IS 16 1281 28770
Pizzoferrato CH 16 1130 29900
Pescocostanzo AQ 17 1128 31028
Poggio Sannita IS 17 702 31730
Borrello CH 18 354 32084
Quadri CH 18 815 32899
Barrea AQ 18 726 33625
Castel San Vincenzo IS 18 516 34141
Rosello CH 18 237 34378
Chiauci IS 19 233 34611
Pizzone IS 19 329 34940
Sessano del Molise IS 19 727 35667
Belmonte del Sannio IS 19 768 36435
Pesche IS 20 1661 38096
Rocchetta a Volturno IS 20 1113 39209
Fornelli IS 20 1909 41118

Municipalities with at least 50000 inhabitants

An earthquake occurred to
64 Km S of Chieti (51815 inhabitants)
76 Km S of Pescara (121014 inhabitants)
79 Km N of Caserta (76326 inhabitants)
82 Km S of Montesilvano (53738 inhabitants)
87 Km NW of Benevento (60091 inhabitants)
90 Km N of Aversa (53047 inhabitants)
92 Km SE of L'Aquila (69753 inhabitants)
94 Km N of Acerra (59573 inhabitants)
95 Km N of Giugliano in Campania (122974 inhabitants)
96 Km N of Afragola (65057 inhabitants)
97 Km N of Casoria (77642 inhabitants)
98 Km N of Marano di Napoli (59874 inhabitants)
98 Km W of San Severo (53905 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 2.4 1997-02-18
21:21:39		 41.779 14.206 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 261379
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-02-18 21:21:39 ± 0.46
Latitude 41.7790 ± 0.0251
Longitude 14.2060 ± 0.0164
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 261379

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) 3106.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 225
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00186
Epicentral distance of station farthest from the epicenter (degree) 0.00639
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 261379
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:07:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.RFI.Z. 1997-02-18T21:21:58.44 10.0 undecidable manual SG 199 0.4995 0.13 0.7
--.RMI2.Z. 1997-02-18T21:21:58.50 10.0 undecidable manual SG 175 0.5217 -0.5 0.6
--.PSB1.Z. 1997-02-18T21:21:52.56 10.0 undecidable manual PG 140 0.7104 -1.56 0.2
--.RFI.Z. 1997-02-18T21:21:51.15 10.0 undecidable manual PG 199 0.4995 0.92 0.8
--.SDI.Z. 1997-02-18T21:21:51.12 10.0 undecidable manual SG 256 0.2997 0.11 0.8
--.SMB1.Z. 1997-02-18T21:21:50.72 10.0 undecidable manual PG 134 0.5439 -0.18 1.7
--.RMI2.Z. 1997-02-18T21:21:49.72 10.0 undecidable manual PG 175 0.5217 -0.91 0.9
--.DUI.Z. 1997-02-18T21:21:48.26 10.0 undecidable manual SG 122 0.2109 0.31 0.6
--.CPI2.Z. 1997-02-18T21:21:47.89 10.0 undecidable manual SG 156 0.2109 0.39 0.6
--.SDI.Z. 1997-02-18T21:21:46.50 10.0 undecidable manual PG 256 0.2997 0.03 2
--.DUI.Z. 1997-02-18T21:21:45.70 10.0 undecidable manual PG 122 0.2109 0.83 0.9
--.CPI2.Z. 1997-02-18T21:21:43.89 10.0 undecidable manual PG 156 0.2109 -0.09 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