Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.3 on date 09-04-2004 and time 05:36:23 (Italy) in region 2 km W Brallo di Pregola (PV)

A magnitude Md 2.3 earthquake occured in region: 2 km W Brallo di Pregola (PV), on

  • 09-04-2004 03:36:23 (UTC)
  • 09-04-2004 05:36:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.7300, 9.2560 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
Brallo di Pregola PV 2 599 599
Santa Margherita di Staffora PV 5 473 1072
Zerba PC 8 77 1149
Menconico PV 8 360 1509
Fabbrica Curone AL 9 656 2165
Cerignale PC 10 127 2292
Corte Brugnatella PC 10 586 2878
Bobbio PC 11 3577 6455
Varzi PV 11 3279 9734
Montacuto AL 12 278 10012
Coli PC 13 879 10891
Ottone PC 13 516 11407
Romagnese PV 13 687 12094
Carrega Ligure AL 14 84 12178
Cabella Ligure AL 14 528 12706
Gorreto GE 14 97 12803
Gremiasco AL 14 324 13127
Bagnaria PV 15 658 13785
Valverde PV 15 287 14072
Albera Ligure AL 15 325 14397
Zavattarello PV 16 991 15388
San Sebastiano Curone AL 16 583 15971
Rocchetta Ligure AL 16 200 16171
Cantalupo Ligure AL 17 527 16698
Dernice AL 17 185 16883
Rovegno GE 17 554 17437
Val di Nizza PV 18 624 18061
Mongiardino Ligure AL 18 165 18226
Fascia GE 18 81 18307
Ponte Nizza PV 19 807 19114
Roccaforte Ligure AL 19 136 19250
Rondanina GE 19 62 19312
Cecima PV 19 236 19548
Propata GE 19 142 19690
Pecorara PC 19 730 20420
Brignano-Frascata AL 19 456 20876

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km NE of Genova (586655 inhabitants)
50 Km SW of Piacenza (102191 inhabitants)
51 Km S of Pavia (72576 inhabitants)
54 Km E of Alessandria (93943 inhabitants)
72 Km SE of Vigevano (63310 inhabitants)
75 Km SW of Cremona (71901 inhabitants)
77 Km NE of Savona (61345 inhabitants)
82 Km S of Milano (1345851 inhabitants)
83 Km NW of La Spezia (93959 inhabitants)
85 Km E of Asti (76202 inhabitants)
85 Km W of Parma (192836 inhabitants)
90 Km S of Sesto San Giovanni (81608 inhabitants)
91 Km S of Rho (50434 inhabitants)
92 Km S of Cinisello Balsamo (75078 inhabitants)
94 Km SE of Novara (104380 inhabitants)
95 Km S of Monza (122671 inhabitants)
99 Km NW of Carrara (63133 inhabitants)
100 Km S of Legnano (60262 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 2.3
ML-VAX 1.6 		2004-04-09
03:36:23		 44.73 9.256 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 496159
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2004-04-09 03:36:23 ± 0.201
Latitude 44.7300 ± 0.0205
Longitude 9.2560 ± 0.0135
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 496159

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) 2514.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 199
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
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) 0.00121
Epicentral distance of station farthest from the epicenter (degree) 0.01214
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 496159
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 00:53:55

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 496159
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
--.PII.Z. 2004-04-09T03:37:07.54 10.0 undecidable manual SN 137 1.3431 -0.47 0.3
--.IMI.Z. 2004-04-09T03:37:06.88 10.0 undecidable manual SN 230 1.2654 0.87 0
--.BDI.Z. 2004-04-09T03:37:03.27 10.0 undecidable manual SN 124 1.1544 -0.23 0.6
--.FIN.Z. 2004-04-09T03:36:55.75 10.0 undecidable manual SG 235 0.9102 -0.26 0.6
--.PII.Z. 2004-04-09T03:36:49.46 10.0 undecidable manual PN 137 1.3431 0.09 1.7
--.BDI.Z. 2004-04-09T03:36:47.20 10.0 undecidable manual PN 124 1.1544 0.43 0.8
--.IMI.Z. 2004-04-09T03:36:47.88 10.0 undecidable manual PN 230 1.2654 -0.34 1.1
--.FIN.Z. 2004-04-09T03:36:42.41 10.0 undecidable manual PG 235 0.9102 -0.04 2.1
--.BOB.Z. 2004-04-09T03:36:29.72 10.0 undecidable manual SG 74 0.1332 0.1 0.8
--.BOB.Z. 2004-04-09T03:36:27.70 10.0 undecidable manual PG 74 0.1332 -0.14 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