Earthquake with magnitude of Md 4.0 on date 02-10-1997 and time 23:38:42 (Italy) in region 6 km N Sansepolcro (AR)

A magnitude Md 4.0 earthquake occured in region: 6 km N Sansepolcro (AR), on

  • 02-10-1997 21:38:42 (UTC)
  • 02-10-1997 23:38:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.63, 12.15 at 4 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
Sansepolcro AR 7 15884 15884
San Giustino PG 9 11297 27181
Badia Tedalda AR 9 1087 28268
Pieve Santo Stefano AR 10 3183 31451
Anghiari AR 12 5638 37089
Borgo Pace PU 12 606 37695
Caprese Michelangelo AR 13 1426 39121
Citerna PG 15 3531 42652
Sestino AR 15 1355 44007
Mercatello sul Metauro PU 15 1378 45385
Monterchi AR 16 1757 47142
Casteldelci RN 18 407 47549
Chiusi della Verna AR 19 2023 49572

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NE of Arezzo (99543 inhabitants)
57 Km S of Cesena (96758 inhabitants)
59 Km SW of Rimini (147750 inhabitants)
61 Km NW of Perugia (166134 inhabitants)
67 Km S of Forlì (117913 inhabitants)
69 Km W of Pesaro (94582 inhabitants)
74 Km E of Firenze (382808 inhabitants)
74 Km W of Fano (60888 inhabitants)
74 Km E of Siena (53903 inhabitants)
76 Km S of Faenza (58541 inhabitants)
79 Km E of Scandicci (50609 inhabitants)
87 Km NW of Foligno (57155 inhabitants)
88 Km S of Ravenna (159116 inhabitants)
88 Km SE of Imola (69797 inhabitants)
89 Km E of Prato (191150 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 4.0
ML-MEDNET 4.0
1997-10-02
21:38:42
43.63 12.15 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 287619
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-10-02 21:38:42 ± 0.235
Latitude 43.63 ± 0.01
Longitude 12.15 ± 0.01
Depth (km) 4 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 287619

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) 1831
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.0013
Epicentral distance of station farthest from the epicenter (degree) 0.02121
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

Md:4

Field Value
Value 4
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 287619
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:31:01

ML:4

Field Value
Value 4
Uncertainty
Num. used stations
Type of magnitude ML
Reference to an origin 287619
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 10:37:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.VVI.Z. 1997-10-02T21:39:21.86 10.0 undecidable manual PN 4 0.0212 0.3 0.9
--.SDI.Z. 1997-10-02T21:39:20.50 10.0 undecidable manual PN 146 0.0204 0.13 1
--.PQ9.Z. 1997-10-02T21:39:15.48 10.0 undecidable manual PN 149 0.0166 0.94 0.4
--.RDP.Z. 1997-10-02T21:39:15.96 10.0 undecidable manual PN 167 0.0172 0.52 0.8
--.RMP.Z. 1997-10-02T21:39:15.50 10.0 undecidable manual PN 167 0.0167 0.8 0.5
--.AQU.Z. 1997-10-02T21:39:10.99 10.0 undecidable manual PN 143 0.0141 0.3 1.1
--.EB9.Z. 1997-10-02T21:39:09.99 10.0 undecidable manual PN 302 0.0133 0.55 0.9
--.GU9.Z. 1997-10-02T21:39:07.70 10.0 undecidable manual PN 303 0.012 0.22 1.3
--.CSNT.Z. 1997-10-02T21:39:06.32 10.0 undecidable manual SG 256 0.0057 0.52 0.5
--.MNS.Z. 1997-10-02T21:39:06.66 10.0 undecidable manual PN 162 0.0117 -0.38 1.2
--.ZC9.Z. 1997-10-02T21:39:05.47 10.0 undecidable manual PN 310 0.01 1.06 0.4
--.PII.Z. 1997-10-02T21:39:04.60 10.0 undecidable manual PN 274 0.0106 -0.74 0.8
--.BDI.Z. 1997-10-02T21:39:04.62 10.0 undecidable manual PN 291 0.0108 -1.02 0.4
--.ARV.Z. 1997-10-02T21:39:03.98 10.0 undecidable manual SG 102 0.0053 -0.15 0.6
--.SFI.Z. 1997-10-02T21:38:56.60 10.0 undecidable manual SG 321 0.0032 0.74 0.3
--.RSM.Z. 1997-10-02T21:38:56.42 10.0 undecidable manual SG 35 0.0033 -0.17 0.6
--.ASS.Z. 1997-10-02T21:38:55.66 10.0 undecidable manual PG 146 0.006 -0.77 0.8
--.CSNT.Z. 1997-10-02T21:38:55.30 10.0 positive manual PG 256 0.0057 -0.81 1.4
--.ARV.Z. 1997-10-02T21:38:53.76 10.0 undecidable manual PG 102 0.0053 -1.12 0.4
--.RSM.Z. 1997-10-02T21:38:50.79 10.0 positive manual PG 35 0.0033 0.27 2.9
--.PGD.Z. 1997-10-02T21:38:50.61 10.0 undecidable manual PG 308 0.0035 -0.47 1.2
--.SFI.Z. 1997-10-02T21:38:49.66 10.0 positive manual PG 321 0.0032 -0.45 2.5
--.CRE.Z. 1997-10-02T21:38:46.20 10.0 positive manual PG 266 0.0013 0.63 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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