Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.2 on date 04-02-1990 and time 02:05:33 (Italy) in region 9 km W Verghereto (FC)

A magnitude Md 2.2 earthquake occured in region: 9 km W Verghereto (FC), on

  • 04-02-1990 01:05:33 (UTC)
  • 04-02-1990 02:05:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.8020, 11.8990 at 74 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
Verghereto FC 9 1907 1907
Bagno di Romagna FC 9 6026 7933
Chiusi della Verna AR 12 2023 9956
Bibbiena AR 14 12241 22197
Poppi AR 14 6160 28357
Pratovecchio Stia AR 14 5845 34202
Chitignano AR 16 899 35101
Santa Sofia FC 16 4136 39237
Castel San Niccolò AR 17 2707 41944
Castel Focognano AR 17 3149 45093
Ortignano Raggiolo AR 18 878 45971
Pieve Santo Stefano AR 19 3183 49154
Caprese Michelangelo AR 19 1426 50580

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km N of Arezzo (99543 inhabitants)
46 Km SW of Cesena (96758 inhabitants)
48 Km S of Forlì (117913 inhabitants)
52 Km E of Firenze (382808 inhabitants)
54 Km S of Faenza (58541 inhabitants)
58 Km E of Scandicci (50609 inhabitants)
61 Km W of Rimini (147750 inhabitants)
63 Km S of Imola (69797 inhabitants)
65 Km E of Prato (191150 inhabitants)
71 Km NE of Siena (53903 inhabitants)
73 Km SW of Ravenna (159116 inhabitants)
80 Km E of Pistoia (90315 inhabitants)
82 Km W of Pesaro (94582 inhabitants)
87 Km NW of Perugia (166134 inhabitants)
89 Km SE of Bologna (386663 inhabitants)
90 Km W of Fano (60888 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 2.2
ML-VAX 1.5 		1990-02-04
01:05:33		 43.802 11.899 73 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 109419
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-02-04 01:05:33 ± 0.311
Latitude 43.8020 ± 0.0234
Longitude 11.8990 ± 0.0220
Depth (km) 73 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 109419

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) 3145.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
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) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00097
Epicentral distance of station farthest from the epicenter (degree) 0.02024
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 109419
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:41:46

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 109419
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
--.CTI.Z. 1990-02-04T01:06:33.53 10.0 undecidable manual S 355 2.2422 -1.01 0.1
--.CTI.Z. 1990-02-04T01:06:08.58 10.0 undecidable manual P 355 2.2422 -0.17 1.1
--.BDI.Z. 1990-02-04T01:06:05.00 10.0 undecidable manual S 285 0.9657 -0.56 0.4
--.PII.Z. 1990-02-04T01:06:05.37 10.0 undecidable manual S 265 0.9879 -0.68 0.3
--.ASS.Z. 1990-02-04T01:06:03.96 10.0 undecidable manual S 143 0.9213 -0.49 0.5
--.ARV.Z. 1990-02-04T01:06:01.96 10.0 undecidable manual S 111 0.8103 -0.33 0.7
--.PGD.Z. 1990-02-04T01:05:53.00 10.0 undecidable manual S 299 0.1443 0.51 0.5
--.SFI.Z. 1990-02-04T01:05:52.80 10.0 undecidable manual S 340 0.111 -0.21 0.8
--.BDI.Z. 1990-02-04T01:05:52.20 10.0 undecidable manual P 285 0.9657 0.18 1.9
--.PII.Z. 1990-02-04T01:05:52.73 10.0 undecidable manual P 265 0.9879 0.43 1.3
--.CRE.Z. 1990-02-04T01:05:51.80 10.0 undecidable manual S 168 0.1776 -0.94 0.1
--.ARV.Z. 1990-02-04T01:05:50.79 10.0 undecidable manual P 111 0.8103 0.67 0.9
--.ASS.Z. 1990-02-04T01:05:50.82 10.0 undecidable manual P 143 0.9213 -0.56 1.1
--.RSM.Z. 1990-02-04T01:05:46.26 10.0 undecidable manual P 72 0.4107 0.17 2.2
--.PGD.Z. 1990-02-04T01:05:45.00 10.0 undecidable manual P 299 0.1443 0.53 1.2
--.CRE.Z. 1990-02-04T01:05:44.50 10.0 undecidable manual P 168 0.1776 -0.11 2.2
--.SFI.Z. 1990-02-04T01:05:44.73 10.0 undecidable manual P 340 0.111 0.38 1.7
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