Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 3.4 on date 26-02-1997 and time 03:36:51 (Italy) in region 1 km W Castelsaraceno (PZ)

A magnitude Md 3.4 earthquake occured in region: 1 km W Castelsaraceno (PZ), on

  • 26-02-1997 02:36:51 (UTC)
  • 26-02-1997 03:36:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.1680, 15.9880 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
Castelsaraceno PZ 1 1384 1384
San Chirico Raparo PZ 8 1084 2468
Latronico PZ 9 4556 7024
Carbone PZ 9 638 7662
San Martino d'Agri PZ 10 801 8463
Spinoso PZ 11 1462 9925
Sarconi PZ 12 1404 11329
Moliterno PZ 13 4062 15391
Calvera PZ 13 387 15778
Episcopia PZ 14 1434 17212
Teana PZ 15 613 17825
Montemurro PZ 15 1235 19060
Grumento Nova PZ 15 1700 20760
Fardella PZ 16 627 21387
Armento PZ 17 631 22018
Castronuovo di Sant'Andrea PZ 17 1067 23085
Castelluccio Superiore PZ 18 824 23909
Castelluccio Inferiore PZ 18 2131 26040
Lauria PZ 19 12919 38959
Gallicchio PZ 19 862 39821
Roccanova PZ 19 1543 41364
Nemoli PZ 20 1495 42859
Lagonegro PZ 20 5584 48443
Missanello PZ 20 566 49009
Chiaromonte PZ 20 1965 50974

Municipalities with at least 50000 inhabitants

An earthquake occurred to
55 Km S of Potenza (67122 inhabitants)
76 Km SW of Matera (60436 inhabitants)
88 Km SW of Altamura (70396 inhabitants)
98 Km SE of Battipaglia (50786 inhabitants)
100 Km N of Cosenza (67546 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		Md 3.4
ML-VAX 2.2 		1997-02-26
02:36:51		 40.168 15.988 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 261779
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-02-26 02:36:51 ± 0.145
Latitude 40.1680 ± 0.0122
Longitude 15.9880 ± 0.0147
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 261779

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) 1843.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00308
Epicentral distance of station farthest from the epicenter (degree) 0.02024
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 23
Magnitudes information

Md:3.4

Field Value
Value 3.4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 261779
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:07:38

ML:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 15
Type of magnitude ML
Reference to an origin 261779
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.FG3.Z. 1997-02-26T02:37:41.34 10.0 undecidable manual SN 358 1.5318 0.93 0.3
--.BRT.Z. 1997-02-26T02:37:31.40 10.0 undecidable manual SN 50 1.1211 0.38 0.7
--.SDI.Z. 1997-02-26T02:37:30.34 10.0 undecidable manual PN 313 2.2422 0.6 0.9
--.MO9.Z. 1997-02-26T02:37:29.42 10.0 undecidable manual PN 185 2.1756 0.73 0.8
--.SOI.Z. 1997-02-26T02:37:27.37 10.0 undecidable manual PN 178 2.0868 -0.19 1.3
--.CI9.Z. 1997-02-26T02:37:27.97 10.0 undecidable manual SG 313 1.0101 0.77 0.4
--.SA1.Z. 1997-02-26T02:37:24.32 10.0 undecidable manual PN 209 1.8315 0.3 1.3
--.RFI.Z. 1997-02-26T02:37:24.57 10.0 undecidable manual PN 307 1.887 -0.23 1.4
--.FG2.Z. 1997-02-26T02:37:22.64 10.0 undecidable manual PN 339 1.7427 -0.21 1.5
--.SMB1.Z. 1997-02-26T02:37:21.90 10.0 undecidable manual PN 322 1.554 0.9 0.7
--.LCI.Z. 1997-02-26T02:37:21.50 10.0 undecidable manual PN 83 1.6317 0.33 1.5
--.LT9.Z. 1997-02-26T02:37:19.70 10.0 undecidable manual SG 54 0.7659 -0.39 0.6
--.VTB1.Z. 1997-02-26T02:37:19.34 10.0 undecidable manual PN 314 1.443 0.69 1
--.FG3.Z. 1997-02-26T02:37:19.38 10.0 undecidable manual PN 358 1.5318 -0.56 1.3
--.PSB1.Z. 1997-02-26T02:37:18.39 10.0 undecidable manual PN 319 1.3764 0.62 1.2
--.GRI.Z. 1997-02-26T02:37:17.85 10.0 undecidable manual PN 165 1.3875 0.02 1.7
--.MRB1.Z. 1997-02-26T02:37:16.82 10.0 undecidable manual PN 321 1.221 1.15 0.5
--.FG5.Z. 1997-02-26T02:37:15.70 10.0 undecidable manual PN 333 1.2321 -0.14 1.8
--.SGO.Z. 1997-02-26T02:37:14.21 10.0 undecidable manual SG 307 0.6438 -1.47 0.2
--.BRT.Z. 1997-02-26T02:37:13.37 10.0 undecidable manual PN 50 1.1211 -0.94 0.9
--.TDS.Z. 1997-02-26T02:37:13.14 10.0 undecidable manual SG 151 0.5661 -0.13 0.7
--.CI9.Z. 1997-02-26T02:37:12.43 10.0 undecidable manual PG 313 1.0101 0.12 1.8
--.CA9.Z. 1997-02-26T02:37:09.10 10.0 undecidable manual PG 330 0.8325 -0.13 1.9
--.LT9.Z. 1997-02-26T02:37:08.86 10.0 undecidable manual PG 54 0.7659 1.02 0.8
--.SL9.Z. 1997-02-26T02:37:05.57 10.0 undecidable manual SG 309 0.3441 0 0.7
--.ORI.Z. 1997-02-26T02:37:05.96 10.0 undecidable manual SG 108 0.3552 -0.27 0.7
--.MU9.Z. 1997-02-26T02:37:04.74 10.0 undecidable manual PG 327 0.6993 -1.94 0.1
--.TDS.Z. 1997-02-26T02:37:03.16 10.0 undecidable manual PG 151 0.5661 -1.11 0.7
--.SGO.Z. 1997-02-26T02:37:03.50 10.0 undecidable manual PG! 307 0.6438 -2.16 0
--.ORI.Z. 1997-02-26T02:37:00.17 10.0 undecidable manual PG 108 0.3552 -0.04 1.9
--.SL9.Z. 1997-02-26T02:36:58.70 10.0 negative manual PG 309 0.3441 -1.13 1.6
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download