Earthquake with magnitude of Md 2.6 on date 07-04-1989 and time 16:25:02 (UTC) in region 6 km W Pomarance (PI)

A magnitude Md 2.6 earthquake occured in region: 6 km W Pomarance (PI), on

  • 07-04-1989 16:25:02 (UTC)
  • 07-04-1989 18:25:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.291, 10.797 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Pomarance PI 6 5897 5897
Montecatini Val di Cecina PI 12 1749 7646
Castelnuovo di Val di Cecina PI 13 2231 9877
Guardistallo PI 13 1234 11111
Volterra PI 13 10519 21630
Montescudaio PI 14 2144 23774
Monteverdi Marittimo PI 14 758 24532
Casale Marittimo PI 15 1122 25654
Bibbona LI 16 3175 28829
Monterotondo Marittimo GR 17 1371 30200
Riparbella PI 18 1603 31803

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of Siena (53903 inhabitants)
49 Km SE of Livorno (159219 inhabitants)
57 Km SE of Pisa (89158 inhabitants)
61 Km SW of Scandicci (50609 inhabitants)
64 Km NW of Grosseto (82087 inhabitants)
65 Km SW of Firenze (382808 inhabitants)
66 Km SE of Lucca (89046 inhabitants)
70 Km SW of Prato (191150 inhabitants)
72 Km S of Pistoia (90315 inhabitants)
78 Km SE of Viareggio (62467 inhabitants)
90 Km W of Arezzo (99543 inhabitants)
98 Km SE of Massa (69479 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 2.6
ML-VAX 2.4
1989-04-07
16:25:02
43.291 10.797 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 89449
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-04-07 16:25:02 ± 0.299
Latitude 43.2910 ± 0.0159
Longitude 10.7970 ± 0.0291
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 89449

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) 2942
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 163
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.00421
Epicentral distance of station farthest from the epicenter (degree) 0.01587
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 8
Type of magnitude Md
Reference to an origin 89449
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:23:55

ML:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 6
Type of magnitude ML
Reference to an origin 89449
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 Takeoff_angle Residual Weight
--.SFI.Z. 1989-04-07T16:25:37.00 10.0 undecidable manual SG 50 0.0087 1.23 0.1
--.CRE.Z. 1989-04-07T16:25:34.00 10.0 undecidable manual SG 67 0.008 0.72 0.2
--.BOB.Z. 1989-04-07T16:25:34.50 10.0 undecidable manual PN 326 0.0159 1.71 0
--.PGD.Z. 1989-04-07T16:25:32.53 10.0 undecidable manual SG 48 0.0079 -0.39 0.5
--.MAO.Z. 1989-04-07T16:25:32.91 10.0 undecidable manual SG 163 0.0082 -0.78 0.2
--.BDI.Z. 1989-04-07T16:25:29.46 10.0 undecidable manual SG 349 0.007 -0.13 0.5
--.ASS.Z. 1989-04-07T16:25:28.10 10.0 undecidable manual PN 98 0.0123 0.72 0.6
--.SFI.Z. 1989-04-07T16:25:21.81 10.0 undecidable manual PG 50 0.0087 0.1 1.2
--.FIR.N. 1989-04-07T16:25:21.00 10.0 undecidable manual SG 34 0.0053 -2.21 0
--.CRE.Z. 1989-04-07T16:25:20.50 10.0 undecidable manual PG 67 0.008 0.23 1.2
--.MME.Z. 1989-04-07T16:25:20.58 10.0 undecidable manual PG 355 0.0081 0.2 1.3
--.MAO.Z. 1989-04-07T16:25:20.27 10.0 negative manual PG 163 0.0082 -0.24 2.3
--.PGD.Z. 1989-04-07T16:25:19.99 10.0 negative manual PG 48 0.0079 -0.08 2.6
--.BDI.Z. 1989-04-07T16:25:18.20 10.0 negative manual PG 349 0.007 -0.13 2.5
--.PII.Z. 1989-04-07T16:25:18.90 10.0 undecidable manual SG 335 0.0042 -0.71 0.2
--.FIR.Z. 1989-04-07T16:25:14.00 10.0 undecidable manual PG 34 0.0053 -0.46 1
--.PII.Z. 1989-04-07T16:25:12.43 10.0 negative manual PG 335 0.0042 0.05 2.6
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