Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.7 on date 01-02-2004 and time 03:23:58 (Italy) in region 2 km SW Balsorano (AQ)

A magnitude Md 2.7 earthquake occured in region: 2 km SW Balsorano (AQ), on

  • 01-02-2004 02:23:58 (UTC)
  • 01-02-2004 03:23:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.7860, 13.5480 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
Balsorano AQ 3 3569 3569
San Vincenzo Valle Roveto AQ 6 2347 5916
Sora FR 9 26144 32060
Pescosolido FR 10 1555 33615
Villavallelonga AQ 11 919 34534
Broccostella FR 12 2741 37275
Morino AQ 12 1448 38723
Collelongo AQ 12 1233 39956
Castelliri FR 12 3454 43410
Campoli Appennino FR 12 1725 45135
Isola del Liri FR 12 11715 56850
Civita d'Antino AQ 13 979 57829
Veroli FR 15 20560 78389
Collepardo FR 15 968 79357
Arpino FR 16 7262 86619
Posta Fibreno FR 16 1139 87758
Monte San Giovanni Campano FR 16 12929 100687
Fontechiari FR 17 1303 101990
Boville Ernica FR 17 8737 110727
Vico nel Lazio FR 17 2234 112961
Civitella Roveto AQ 18 3268 116229
Vicalvi FR 18 783 117012
Alatri FR 18 28952 145964
Fontana Liri FR 19 2953 148917
Trasacco AQ 19 6246 155163
Guarcino FR 19 1623 156786
Alvito FR 20 2713 159499

Municipalities with at least 50000 inhabitants

An earthquake occurred to
64 Km S of L'Aquila (69753 inhabitants)
64 Km NE of Latina (125985 inhabitants)
65 Km E of Velletri (53303 inhabitants)
65 Km E of Tivoli (56533 inhabitants)
72 Km E of Guidonia Montecelio (88673 inhabitants)
78 Km E of Aprilia (73446 inhabitants)
81 Km SW of Chieti (51815 inhabitants)
85 Km E of Anzio (54211 inhabitants)
88 Km E of Pomezia (62966 inhabitants)
89 Km E of Roma (2864731 inhabitants)
93 Km SW of Pescara (121014 inhabitants)
95 Km SW of Montesilvano (53738 inhabitants)
98 Km S of Teramo (54892 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 2.7
ML-VAX 1.7 		2004-02-01
02:23:58		 41.786 13.548 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 492639
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2004-02-01 02:23:58 ± 0.164
Latitude 41.7860 ± 0.0116
Longitude 13.5480 ± 0.0127
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 492639

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) 1668.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
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) 0.01287
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

Md:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 492639
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 00:50:18

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 492639
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
--.NRCA.Z. 2004-02-01T02:24:37.37 10.0 undecidable manual SN 343 1.0878 0.89 0.2
--.MNS.Z. 2004-02-01T02:24:30.22 10.0 undecidable manual SG 313 0.8769 0.55 0.5
--.ASS.Z. 2004-02-01T02:24:26.37 10.0 undecidable manual PN 333 1.4319 1.21 0.2
--.MA9.Z. 2004-02-01T02:24:22.00 10.0 undecidable manual SG 269 0.6549 -0.73 0.4
--.NRCA.Z. 2004-02-01T02:24:20.66 10.0 undecidable manual PN 343 1.0878 0.19 1.3
--.CII.Z. 2004-02-01T02:24:20.67 10.0 undecidable manual SG 96 0.5661 0.95 0.3
--.MNS.Z. 2004-02-01T02:24:16.13 10.0 undecidable manual PG 313 0.8769 -0.41 1.2
--.CERT.Z. 2004-02-01T02:24:14.65 10.0 undecidable manual SG 291 0.444 -1.32 0.1
--.SGG.Z. 2004-02-01T02:24:13.60 10.0 undecidable manual PG 122 0.7326 -0.34 1.5
--.MA9.Z. 2004-02-01T02:24:11.88 10.0 undecidable manual PG 269 0.6549 -0.65 1.1
--.AQU.Z. 2004-02-01T02:24:11.90 10.0 undecidable manual PG 349 0.5772 0.94 0.8
--.CII.Z. 2004-02-01T02:24:10.80 10.0 undecidable manual PG 96 0.5661 -0.72 1.1
--.GIUL.Z. 2004-02-01T02:24:10.52 10.0 undecidable manual SG 224 0.3108 -0.37 0.6
--.CERT.Z. 2004-02-01T02:24:08.20 10.0 undecidable manual PG 291 0.444 -0.61 1.2
--.PTQR.Z. 2004-02-01T02:24:08.77 10.0 undecidable manual SG 335 0.2553 0.01 0.7
--.SDI.Z. 2004-02-01T02:24:06.65 10.0 undecidable manual SG 111 0.2109 -0.23 0.7
--.GIUL.Z. 2004-02-01T02:24:06.34 10.0 negative manual PG 224 0.3108 0.65 2.5
--.INTR.Z. 2004-02-01T02:24:05.80 10.0 undecidable manual PG 49 0.3441 -1.33 0.3
--.PTQR.Z. 2004-02-01T02:24:04.60 10.0 undecidable manual PG 335 0.2553 0.13 1.8
--.SDI.Z. 2004-02-01T02:24:03.58 10.0 positive manual PG 111 0.2109 0.2 3.5
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