Earthquake with magnitude of Md 2.1 on date 17-03-1985 and time 12:15:02 (UTC) in region 4 km SE Pisa (PI)

A magnitude Md 2.1 earthquake occured in region: 4 km SE Pisa (PI), on

  • 17-03-1985 12:15:02 (UTC)
  • 17-03-1985 13:15:02 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.7, 10.44 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
Pisa PI 4 89158 89158
Calci PI 7 6426 95584
San Giuliano Terme PI 8 31399 126983
Cascina PI 9 45257 172240
Vecchiano PI 11 12189 184429
Vicopisano PI 11 8559 192988
Collesalvetti LI 12 16827 209815
Buti PI 12 5791 215606
Calcinaia PI 14 12439 228045
Bientina PI 14 8062 236107
Fauglia PI 15 3682 239789
Pontedera PI 16 29223 269012
Crespina Lorenzana PI 17 5457 274469
Ponsacco PI 17 15611 290080
Lucca LU 17 89046 379126
Livorno LI 19 159219 538345

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km SE of Pisa (89158 inhabitants)
17 Km S of Lucca (89046 inhabitants)
19 Km NE of Livorno (159219 inhabitants)
25 Km SE of Viareggio (62467 inhabitants)
45 Km SE of Massa (69479 inhabitants)
46 Km SW of Pistoia (90315 inhabitants)
51 Km SE of Carrara (63133 inhabitants)
56 Km W of Prato (191150 inhabitants)
60 Km W of Scandicci (50609 inhabitants)
66 Km W of Firenze (382808 inhabitants)
67 Km SE of La Spezia (93959 inhabitants)
83 Km NW of Siena (53903 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
Rev 1000 Md 2.1 1985-03-17
12:15:02
43.7 10.45 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 3319
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-03-17 12:15:02 ± 1.201
Latitude 43.70 ± 0.05
Longitude 10.45 ± 0.11
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 3319

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) 10413.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 283
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00057
Epicentral distance of station farthest from the epicenter (degree) 0.00979
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 3319
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:08:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CH1.Z. 1985-03-17T12:15:40.00 10.0 undecidable manual SN 93 0.0098 0.84 0.1
--.CH1.Z. 1985-03-17T12:15:24.00 10.0 undecidable manual PN 93 0.0098 0.21 1.1
--.BD1.Z. 1985-03-17T12:15:11.50 10.0 undecidable manual PG 16 0.0034 0.5 1
--.PS9.Z. 1985-03-17T12:15:06.50 10.0 undecidable manual SG 65 0.0006 -0.52 0.4
--.PS9.Z. 1985-03-17T12:15:04.80 10.0 positive manual PG 65 0.0006 -0.43 2.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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