Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.4 on date 16-05-1995 and time 14:53:02 (Italy) in region 2 km E Certaldo (FI)

A magnitude Md 2.4 earthquake occured in region: 2 km E Certaldo (FI), on

  • 16-05-1995 12:53:02 (UTC)
  • 16-05-1995 14:53:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5390, 11.0690 at 10 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
Certaldo FI 2 16121 16121
San Gimignano SI 8 7820 23941
Barberino Val d'Elsa FI 8 4386 28327
Tavarnelle Val di Pesa FI 9 7800 36127
Gambassi Terme FI 9 4870 40997
Poggibonsi SI 10 29196 70193
Castelfiorentino FI 11 17504 87697
Montespertoli FI 12 13537 101234
Montaione FI 13 3700 104934
Colle di Val d'Elsa SI 14 21620 126554
San Casciano in Val di Pesa FI 16 17062 143616
Castellina in Chianti SI 19 2859 146475

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SW of Scandicci (50609 inhabitants)
30 Km SW of Firenze (382808 inhabitants)
32 Km NW of Siena (53903 inhabitants)
38 Km S of Prato (191150 inhabitants)
46 Km S of Pistoia (90315 inhabitants)
57 Km SE of Lucca (89046 inhabitants)
57 Km E of Pisa (89158 inhabitants)
61 Km E of Livorno (159219 inhabitants)
66 Km W of Arezzo (99543 inhabitants)
75 Km E of Viareggio (62467 inhabitants)
87 Km N of Grosseto (82087 inhabitants)
93 Km SE of Massa (69479 inhabitants)
98 Km SE of Carrara (63133 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
ML-VAX 1.5 		1995-05-16
12:53:02		 43.539 11.069 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 226409
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1995-05-16 12:53:02 ± 0.638
Latitude 43.5390 ± 0.0367
Longitude 11.0690 ± 0.0277
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 226409

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) 4648.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 244
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00243
Epicentral distance of station farthest from the epicenter (degree) 0.00729
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 226409
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 20:34:07

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 226409
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
--.ZC9.Z. 1995-05-16T12:53:33.50 10.0 undecidable manual SG! 355 0.8103 2.86 0
--.SFI.Z. 1995-05-16T12:53:26.94 10.0 undecidable manual SG 56 0.666 0.94 0.1
--.BDI.Z. 1995-05-16T12:53:24.27 10.0 undecidable manual SG 327 0.6216 -0.23 0.7
--.CRE.Z. 1995-05-16T12:53:24.73 10.0 undecidable manual SG 82 0.6327 -0.4 0.5
--.ZC9.Z. 1995-05-16T12:53:21.00 10.0 undecidable manual PG! 355 0.8103 2.23 0
--.PTF.Z. 1995-05-16T12:53:18.83 10.0 undecidable manual SG 0 0.4107 0.87 0.1
--.CRE.Z. 1995-05-16T12:53:15.77 10.0 undecidable manual PG 82 0.6327 0.18 1.7
--.SFI.Z. 1995-05-16T12:53:15.98 10.0 undecidable manual PG 56 0.666 -0.11 1.8
--.BDI.Z. 1995-05-16T12:53:15.17 10.0 undecidable manual PG 327 0.6216 -0.05 1.9
--.SEI.Z. 1995-05-16T12:53:14.29 10.0 undecidable manual PG 22 0.5439 0.33 1.6
--.VMG.Z. 1995-05-16T12:53:13.95 10.0 undecidable manual PG 39 0.5439 0.21 1.8
--.FIR.Z. 1995-05-16T12:53:12.00 10.0 undecidable manual SG 29 0.2664 -1.16 0
--.PTF.Z. 1995-05-16T12:53:11.54 10.0 undecidable manual PG 0 0.4107 0.09 2
--.FIR.Z. 1995-05-16T12:53:08.00 10.0 undecidable manual PG 29 0.2664 -0.68 0.7
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