Earthquake with magnitude of ML 1.4 on date 26-04-2020 and time 23:02:17 (UTC) in region 3 km W Monteverdi Marittimo (PI)

A magnitude ML 1.4 earthquake occured in region: 3 km W Monteverdi Marittimo (PI), on

  • 26-04-2020 23:02:17 (UTC)
  • 27-04-2020 01:02:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.19, 10.68 at 9 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 3 758 758
Castagneto Carducci LI 6 9010 9768
Sassetta LI 7 514 10282
Bibbona LI 12 3175 13457
Suvereto LI 12 3072 16529
Casale Marittimo PI 14 1122 17651
Guardistallo PI 15 1234 18885
San Vincenzo LI 15 6911 25796
Campiglia Marittima LI 15 13218 39014
Monterotondo Marittimo GR 15 1371 40385
Montescudaio PI 16 2144 42529
Castelnuovo di Val di Cecina PI 19 2231 44760
Cecina LI 19 28046 72806

Municipalities with at least 50000 inhabitants

An earthquake occurred to
51 Km SE of Livorno (159219 inhabitants)
55 Km W of Siena (53903 inhabitants)
59 Km NW of Grosseto (82087 inhabitants)
63 Km SE of Pisa (89158 inhabitants)
75 Km S of Lucca (89046 inhabitants)
76 Km SW of Scandicci (50609 inhabitants)
80 Km SW of Firenze (382808 inhabitants)
83 Km SE of Viareggio (62467 inhabitants)
84 Km SW of Prato (191150 inhabitants)
85 Km S of Pistoia (90315 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
ML 1.4 2020-04-26
23:02:17
43.19 10.68 9 2020-07-18
21:08:41
Bollettino Sismico Italiano INGV 80520231
Reviewed
Rev100
ML 1.5 2020-04-26
23:02:17
43.18 10.68 9 2020-04-26
23:08:54
Sala Sismica INGV-Roma 78610671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-26 23:02:17 ± 0.12
Latitude 43.19 ± 0.01
Longitude 10.68 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 80520231

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 715
Semi-minor axis of confidence ellipse (meter) 597
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 42
Circular confidence region, given by single value of horizontal uncertainty (meter) 710
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
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) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.08903
Epicentral distance of station farthest from the epicenter (degree) 0.82648
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 80520231
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-26 10:07:03

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 78610671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-26 23:08:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
Z3.A317A.HHE. 2020-04-26T23:02:39.66 0.6 undecidable manual S 258 0.6259 50 0.83 37
IV.CELB.HHZ. 2020-04-26T23:02:36.32 0.3 undecidable manual S 218 0.5576 50 -0.47 65
IV.CSNT.HHE. 2020-04-26T23:02:36.19 0.3 undecidable manual S 57 0.5288 50 0.25 69
IV.PII.HHZ. 2020-04-26T23:02:35.60 0.3 undecidable manual S 348 0.5477 50 -0.9 55
IV.MAON.HHZ. 2020-04-26T23:02:33.57 0.6 undecidable manual P 156 0.8265 50 0.41 42
IV.CASP.HHZ. 2020-04-26T23:02:32.17 0.3 undecidable manual S 161 0.4173 50 -0.47 67
IV.RIBO.EHE.01 2020-04-26T23:02:30.93 0.3 undecidable manual S 131 0.357 50 0.07 74
Z3.A317A.HHE. 2020-04-26T23:02:30.00 0.3 undecidable manual P 258 0.6259 50 0.27 67
IV.PII.HHZ. 2020-04-26T23:02:28.42 0.3 undecidable manual P 348 0.5477 50 0.03 72
IV.CELB.HHZ. 2020-04-26T23:02:28.55 0.3 undecidable manual P 218 0.5576 50 -0.01 72
IV.CSNT.HHE. 2020-04-26T23:02:28.54 0.6 undecidable manual P 57 0.5288 50 0.47 44
IV.CASP.HHZ. 2020-04-26T23:02:26.21 0.3 undecidable manual P 161 0.4173 50 0.05 73
IV.RIBO.EHE.01 2020-04-26T23:02:25.36 0.3 undecidable manual P 131 0.357 50 0.22 72
IV.TRIF.CHE. 2020-04-26T23:02:24.80 0.3 undecidable manual S 114 0.1772 114 0.01 77
IV.TRIF.CHE. 2020-04-26T23:02:21.18 0.3 undecidable manual P 114 0.1772 114 -0.45 71
IV.MAGO.CHE. 2020-04-26T23:02:21.68 0.3 undecidable manual S 350 0.089 132 -0.22 76
IV.MAGO.CHE. 2020-04-26T23:02:20.21 0.1 negative manual P 350 0.089 132 0.25 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PII.HHE. ML:0 2.605E-5 0.28 AML other m 2020-04-26T23:02:38.58
IV.CASP.HHN. ML:1.2 5.395E-5 0.7 AML other m 2020-04-26T23:02:36.75
IV.PII.HHN. ML:1.1 2.441186E-5 0.2816 AML other m 2020-04-26T23:02:37.66
IV.CELB.HHN. ML:1.8 0.00012131278 0.0768 AML other m 2020-04-26T23:02:37.66
IV.CELB.HHE. ML:2 0.00021385435 0.064 AML other m 2020-04-26T23:02:37.48
IV.MAON.HHE. ML:1.2 2.144559E-5 0.192 AML other m 2020-04-26T23:02:47.46
IV.MAON.HHN. ML:1.5 3.696755E-5 0.2432 AML other m 2020-04-26T23:02:46.84
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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