Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 27-04-2020 and time 00:39:49 (Italy) in region 3 km NW Monteverdi Marittimo (PI)

A magnitude ML 1.2 earthquake occured in region: 3 km NW Monteverdi Marittimo (PI), on

  • 26-04-2020 22:39:49 (UTC)
  • 27-04-2020 00:39:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1940, 10.6930 at 8 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Monteverdi Marittimo PI 3 758 758
Castagneto Carducci LI 8 9010 9768
Sassetta LI 8 514 10282
Bibbona LI 11 3175 13457
Suvereto LI 13 3072 16529
Casale Marittimo PI 13 1122 17651
Guardistallo PI 14 1234 18885
Monterotondo Marittimo GR 14 1371 20256
Montescudaio PI 16 2144 22400
Campiglia Marittima LI 16 13218 35618
San Vincenzo LI 16 6911 42529
Castelnuovo di Val di Cecina PI 17 2231 44760
Pomarance PI 19 5897 50657
Cecina LI 19 28046 78703

Municipalities with at least 50000 inhabitants

An earthquake occurred to
51 Km SE of Livorno (159219 inhabitants)
54 Km W of Siena (53903 inhabitants)
59 Km NW of Grosseto (82087 inhabitants)
63 Km SE of Pisa (89158 inhabitants)
74 Km S of Lucca (89046 inhabitants)
74 Km SW of Scandicci (50609 inhabitants)
79 Km SW of Firenze (382808 inhabitants)
83 Km SE of Viareggio (62467 inhabitants)
83 Km SW of Prato (191150 inhabitants)
84 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
Reviewed
Rev100 		ML 1.2 2020-04-26
22:39:49		 43.1938 10.6927 8 2020-04-26
22:46:27		 Sala Sismica INGV-Roma 78609801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-26 22:39:49 ± 0.12
Latitude 43.1938 ± 0.0081
Longitude 10.6927 ± 0.0086
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 78609801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 934
Semi-minor axis of confidence ellipse (meter) 577
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 26
Circular confidence region, given by single value of horizontal uncertainty (meter) 930.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.08364
Epicentral distance of station farthest from the epicenter (degree) 0.63672
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 78609801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-26 22:46:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
Z3.A317A.HHE. 2020-04-26T22:40:12.43 0.3 undecidable manual S 257 70.6737 50 0.55 59
IV.CSNT.HHZ. 2020-04-26T22:40:08.42 0.6 undecidable manual S 57 57.2982 50 0.11 45
IV.RIBO.EHZ.01 2020-04-26T22:40:03.16 0.6 undecidable manual S 133 39.5271 50 -0.4 44
Z3.A317A.HHE. 2020-04-26T22:40:02.59 0.3 undecidable manual P 257 70.6737 50 0.02 67
IV.PII.HHZ. 2020-04-26T22:40:00.36 0.6 undecidable manual P 347 60.0954 50 -0.6 40
IV.CELB.HHZ. 2020-04-26T22:40:00.85 0.6 undecidable manual P 218 63.1923 50 -0.57 40
IV.CSNT.HHZ. 2020-04-26T22:40:00.95 0.3 undecidable manual P 57 57.2982 50 0.43 63
IV.CASP.HHZ. 2020-04-26T22:39:58.57 1.0 undecidable manual P 163 46.8198 50 -0.34 22
IV.RIBO.EHZ.01 2020-04-26T22:39:57.60 0.3 undecidable manual P 133 39.5271 50 -0.17 69
IV.TRIF.CHZ. 2020-04-26T22:39:57.12 0.6 undecidable manual S 117 19.1697 113 0.05 49
IV.TRIF.CHZ. 2020-04-26T22:39:54.33 0.1 negative manual P 117 19.1697 113 0.3 93
IV.MAGO.CHZ. 2020-04-26T22:39:53.95 0.3 undecidable manual S 342 9.2796 131 -0.17 73
IV.MAGO.CHZ. 2020-04-26T22:39:52.32 0.1 undecidable manual P 342 9.2796 131 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MAGO.CHE. ML:1.3 0.00028083145 0.0896 AML other m 2020-04-26T22:39:54.79
IV.MAGO.CHN. ML:1.3 0.0003126996 0.1536 AML other m 2020-04-26T22:39:54.25
IV.TRIF.CHE. ML:1.1 0.000102448015 0.1024 AML other m 2020-04-26T22:39:58.06
IV.TRIF.CHN. ML:1.1 0.00011215277 0.1024 AML other m 2020-04-26T22:39:57.87
IV.RIBO.EHE.01 ML:1.4 0.00009745371499999999 0.1536 AML other m 2020-04-26T22:40:03.60
IV.CASP.HHN. ML:1.1 0.00003377645 0.2816 AML other m 2020-04-26T22:40:07.70
IV.CASP.HHE. ML:1.4 0.00007092493 0.2816 AML other m 2020-04-26T22:40:07.53
IV.PII.HHN. ML:0.9 0.000013748357999999999 0.384 AML other m 2020-04-26T22:40:09.79
IV.PII.HHE. ML:0.9 0.000015302881 0.2688 AML other m 2020-04-26T22:40:09.31
IV.CELB.HHN. ML:1.5 0.00006271934 0.0512 AML other m 2020-04-26T22:40:09.87
IV.CELB.HHE. ML:1.8 0.00013742764999999998 0.0512 AML other m 2020-04-26T22:40:09.71
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