Earthquake with magnitude of Md 3.8 on date 20-05-1998 and time 13:07:41 (Italy) in region 6 km E Monteverdi Marittimo (PI)

A magnitude Md 3.8 earthquake occured in region: 6 km E Monteverdi Marittimo (PI), on

  • 20-05-1998 11:07:41 (UTC)
  • 20-05-1998 13:07:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.17, 10.78 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
Monteverdi Marittimo PI 6 758 758
Monterotondo Marittimo GR 7 1371 2129
Castelnuovo di Val di Cecina PI 11 2231 4360
Sassetta LI 12 514 4874
Suvereto LI 13 3072 7946
Castagneto Carducci LI 14 9010 16956
Massa Marittima GR 16 8375 25331
Pomarance PI 16 5897 31228
Campiglia Marittima LI 18 13218 44446
Bibbona LI 19 3175 47621
Montieri GR 19 1204 48825
Casale Marittimo PI 20 1122 49947
Guardistallo PI 20 1234 51181

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km W of Siena (53903 inhabitants)
53 Km NW of Grosseto (82087 inhabitants)
57 Km SE of Livorno (159219 inhabitants)
68 Km SE of Pisa (89158 inhabitants)
73 Km SW of Scandicci (50609 inhabitants)
77 Km SW of Firenze (382808 inhabitants)
78 Km SE of Lucca (89046 inhabitants)
83 Km SW of Prato (191150 inhabitants)
86 Km S of Pistoia (90315 inhabitants)
89 Km SE of Viareggio (62467 inhabitants)
95 Km W of Arezzo (99543 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 3.8
ML-VAX 2.6
1998-05-20
11:07:41
43.17 10.78 5 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 339119
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1998-05-20 11:07:41 ± 0.431
Latitude 43.17 ± 0.02
Longitude 10.78 ± 0.03
Depth (km) 5 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 339119

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) 2827.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 171
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00121
Epicentral distance of station farthest from the epicenter (degree) 0.02736
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 24
Magnitudes information

Md:3.8

Field Value
Value 3.8
Uncertainty
Num. used stations 9
Type of magnitude Md
Reference to an origin 339119
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:17:40

ML:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 5
Type of magnitude ML
Reference to an origin 339119
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
--.PLI2.Z. 1998-05-20T11:08:30.10 10.0 undecidable manual PN 123 0.0262 1.11 0.3
--.VVI.Z. 1998-05-20T11:08:30.87 10.0 undecidable manual PN 22 0.0274 0.32 1
--.CTI.Z. 1998-05-20T11:08:30.71 10.0 undecidable manual PN 11 0.0264 1.57 0.1
--.ASS.Z. 1998-05-20T11:08:26.50 10.0 undecidable manual SN 94 0.0123 -0.3 0.6
--.SDI.Z. 1998-05-20T11:08:25.25 10.0 undecidable manual PN 122 0.024 -0.16 1.1
--.GU9.Z. 1998-05-20T11:08:22.47 10.0 undecidable manual SN 353 0.0106 0.42 0.6
--.ZC9.Z. 1998-05-20T11:08:21.28 10.0 undecidable manual SN 6 0.0107 -0.79 0.4
--.PQ9.Z. 1998-05-20T11:08:20.28 10.0 undecidable manual PN 120 0.0202 0.71 0.8
--.CKI.Z. 1998-05-20T11:08:18.00 10.0 undecidable manual PN 305 0.0198 -0.93 0.6
--.BOB.Z. 1998-05-20T11:08:15.29 10.0 undecidable manual PN 329 0.0167 0.95 0.6
--.RDP.Z. 1998-05-20T11:08:15.98 10.0 undecidable manual PN 134 0.0181 -0.36 1.2
--.BDI.Z. 1998-05-20T11:08:13.22 10.0 undecidable manual SG 351 0.0081 -0.5 0.5
--.NRCA.Z. 1998-05-20T11:08:12.32 10.0 undecidable manual PN 100 0.0155 -0.29 1.4
--.ARV.Z. 1998-05-20T11:08:10.99 10.0 undecidable manual PN 77 0.0144 0.19 1.5
--.MNS.Z. 1998-05-20T11:08:09.55 10.0 undecidable manual PN 118 0.0143 -1.18 0.4
--.FB9.Z. 1998-05-20T11:08:09.96 10.0 undecidable manual PN 69 0.0138 0.07 1.6
--.RSM.Z. 1998-05-20T11:08:09.40 10.0 undecidable manual PN 57 0.0128 1.05 0.6
--.SNTG.Z. 1998-05-20T11:08:09.89 10.0 undecidable manual PN 86 0.0141 -0.49 1.3
--.BS9.Z. 1998-05-20T11:08:09.27 10.0 undecidable manual PN 39 0.013 0.58 1.2
--.ASS.Z. 1998-05-20T11:08:06.88 10.0 undecidable manual PN 94 0.0123 -0.68 1.1
--.ZC9.Z. 1998-05-20T11:08:06.17 10.0 undecidable manual PN 6 0.0107 1.09 0.5
--.EB9.Z. 1998-05-20T11:08:06.67 10.0 undecidable manual PN 348 0.0114 0.38 1.4
--.GU9.Z. 1998-05-20T11:08:05.36 10.0 undecidable manual PN 353 0.0106 0.29 1.5
--.PII.Z. 1998-05-20T11:08:03.23 10.0 undecidable manual SG 341 0.0052 -0.23 0.6
--.SFI.Z. 1998-05-20T11:08:02.51 10.0 undecidable manual PG 46 0.0096 -0.76 0.9
--.CSNT.Z. 1998-05-20T11:08:00.62 10.0 undecidable manual SG 50 0.0042 0.54 0.5
--.BDI.Z. 1998-05-20T11:07:59.79 10.0 positive manual PG 351 0.0081 -0.48 2.7
--.PII.Z. 1998-05-20T11:07:53.99 10.0 positive manual PG 341 0.0052 -0.35 2.9
--.CSNT.Z. 1998-05-20T11:07:51.54 10.0 positive manual PG 50 0.0042 -0.85 1.6
--.GRFL.Z. 1998-05-20T11:07:48.80 10.0 undecidable manual SG 100 0.0012 1.25 0.1
--.GRFL.Z. 1998-05-20T11:07:44.66 10.0 undecidable manual PG 100 0.0012 -0.5 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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