Earthquake with magnitude of Md 1.9 on date 20-03-1985 and time 21:52:08 (Italy) in region 6 km W Piteglio (PT)

A magnitude Md 1.9 earthquake occured in region: 6 km W Piteglio (PT), on

  • 20-03-1985 20:52:08 (UTC)
  • 20-03-1985 21:52:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.04, 10.69 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
Piteglio PT 6 1683 1683
San Marcello Pistoiese PT 8 6416 8099
Bagni di Lucca LU 9 6161 14260
Cutigliano PT 9 1488 15748
Abetone PT 12 621 16369
Villa Basilica LU 13 1633 18002
Marliana PT 13 3210 21212
Borgo a Mozzano LU 13 6994 28206
Coreglia Antelminelli LU 14 5215 33421
Massa e Cozzile PT 15 7983 41404
Pescia PT 15 19644 61048
Fiumalbo MO 16 1280 62328
Barga LU 17 10034 72362
Uzzano PT 17 5770 78132
Buggiano PT 18 8825 86957
Montecatini-Terme PT 18 20409 107366
Serravalle Pistoiese PT 18 11659 119025
Pieve a Nievole PT 19 9266 128291
Pievepelago MO 20 2222 130513

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NW of Pistoia (90315 inhabitants)
26 Km NE of Lucca (89046 inhabitants)
37 Km W of Prato (191150 inhabitants)
40 Km E of Viareggio (62467 inhabitants)
43 Km NE of Pisa (89158 inhabitants)
44 Km E of Massa (69479 inhabitants)
48 Km E of Carrara (63133 inhabitants)
50 Km NW of Scandicci (50609 inhabitants)
54 Km NW of Firenze (382808 inhabitants)
62 Km NE of Livorno (159219 inhabitants)
69 Km E of La Spezia (93959 inhabitants)
70 Km S of Modena (184973 inhabitants)
73 Km SW of Bologna (386663 inhabitants)
74 Km S of Reggio nell'Emilia (171345 inhabitants)
84 Km S of Carpi (70699 inhabitants)
89 Km W of Imola (69797 inhabitants)
90 Km SE of Parma (192836 inhabitants)
95 Km NW of Siena (53903 inhabitants)
99 Km W of Faenza (58541 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 1.9 1985-03-20
20:52:08
44.04 10.69 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 3429
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-03-20 20:52:08 ± 0.441
Latitude 44.04 ± 0.03
Longitude 10.69 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 3429

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) 4244
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 183
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) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00065
Epicentral distance of station farthest from the epicenter (degree) 0.0089
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:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 3429
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:08:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CH1.Z. 1985-03-20T20:52:28.00 10.0 undecidable manual PG 113 0.0089 0.1 1.3
--.PS9.Z. 1985-03-20T20:52:22.00 10.0 undecidable manual SG 200 0.003 0.84 0.5
--.PS9.Z. 1985-03-20T20:52:15.00 10.0 undecidable manual PG 200 0.003 -0.75 1.5
--.BD1.Z. 1985-03-20T20:52:13.50 10.0 undecidable manual SG 290 0.0006 0.67 0.7
--.BD1.Z. 1985-03-20T20:52:09.90 10.0 undecidable manual PG 290 0.0006 -1.05 0.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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