Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 25-04-2020 and time 04:52:10 (UTC) in region 6 km NW Casole d'Elsa (SI)

A magnitude ML 1.4 earthquake occured in region: 6 km NW Casole d'Elsa (SI), on

  • 25-04-2020 04:52:10 (UTC)
  • 25-04-2020 06:52:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.3880, 11.0030 at 6 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
Casole d'Elsa SI 6 3897 3897
San Gimignano SI 10 7820 11717
Colle di Val d'Elsa SI 10 21620 33337
Volterra PI 12 10519 43856
Pomarance PI 14 5897 49753
Radicondoli SI 14 914 50667
Poggibonsi SI 15 29196 79863
Gambassi Terme FI 17 4870 84733
Monteriggioni SI 18 9810 94543
Certaldo FI 18 16121 110664
Montaione FI 20 3700 114364

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km W of Siena (53903 inhabitants)
44 Km SW of Scandicci (50609 inhabitants)
47 Km SW of Firenze (382808 inhabitants)
55 Km S of Prato (191150 inhabitants)
59 Km E of Livorno (159219 inhabitants)
61 Km SE of Pisa (89158 inhabitants)
61 Km S of Pistoia (90315 inhabitants)
65 Km SE of Lucca (89046 inhabitants)
70 Km N of Grosseto (82087 inhabitants)
72 Km W of Arezzo (99543 inhabitants)
81 Km SE of Viareggio (62467 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 1.4 2020-04-25
04:52:10		 43.3883 11.003 6 2020-04-25
05:03:27		 Sala Sismica INGV-Roma 78561731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-25 04:52:10 ± 0.13
Latitude 43.3883 ± 0.0063
Longitude 11.0030 ± 0.0087
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 78561731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 779
Semi-minor axis of confidence ellipse (meter) 355
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 303
Circular confidence region, given by single value of horizontal uncertainty (meter) 780.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.96407
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 18
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 17
Type of magnitude ML
Reference to an origin 78561731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-25 05:03:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ZONE.HHZ. 2020-04-25T04:53:29.11 3.0 undecidable manual Sg 6.83 0
SL.BOJS.BHZ. 2020-04-25T04:53:20.47 3.0 undecidable manual Pg 12.47 0
IV.MTRA.EHZ. 2020-04-25T04:53:14.42 3.0 undecidable manual Sg 5.85 0
IV.MOMA.HHZ. 2020-04-25T04:52:57.02 3.0 undecidable manual S 2.48 0
IV.RUFI.EHZ. 2020-04-25T04:52:30.16 0.6 undecidable manual S 39 64.3911 50 -0.72 39
IV.MPPT.EHZ. 2020-04-25T04:52:29.96 0.6 undecidable manual S 6 63.492 50 -0.69 39
IV.MAON.HHZ. 2020-04-25T04:52:29.88 0.6 undecidable manual P 174 107.0151 50 1.2 29
IV.PII.HHZ. 2020-04-25T04:52:27.00 0.6 undecidable manual S 314 53.3022 50 -0.94 36
IV.CELB.HHZ. 2020-04-25T04:52:27.72 0.3 undecidable manual P 222 95.8263 50 0.76 54
TV.SF14.HHN. 2020-04-25T04:52:25.44 0.3 undecidable manual P 145 85.9473 50 0 68
IV.CRE.HHZ. 2020-04-25T04:52:25.34 0.3 undecidable manual P 71 80.4639 50 0.75 56
IV.RIBO.EHZ.01 2020-04-25T04:52:25.98 0.3 undecidable manual S 176 48.9177 50 -0.76 59
IV.RONT.HHE. 2020-04-25T04:52:24.89 0.3 undecidable manual P 27 75.4689 50 1.07 49
TV.SF04.EHE. 2020-04-25T04:52:24.44 0.6 undecidable manual P 139 81.1521 50 -0.26 43
TV.SF13.HHZ. 2020-04-25T04:52:24.62 0.3 undecidable manual P 141 80.5638 50 0.01 68
GU.POPM.HHZ. 2020-04-25T04:52:24.18 0.3 undecidable manual P 345 75.4689 50 0.36 64
IV.RINC.HHN. 2020-04-25T04:52:23.66 0.3 undecidable manual P 41 73.4709 50 0.14 67
GU.MAIM.HHZ. 2020-04-25T04:52:23.36 0.3 undecidable manual P 325 71.2731 50 0.18 67
IV.CASP.HHE. 2020-04-25T04:52:22.84 0.3 undecidable manual P 190 67.1772 50 0.29 66
IV.MPPT.EHZ. 2020-04-25T04:52:21.97 0.3 undecidable manual P 6 63.492 50 -0.01 70
IV.RUFI.EHZ. 2020-04-25T04:52:21.98 0.3 undecidable manual P 39 64.3911 50 -0.12 69
IV.TRIF.CHZ. 2020-04-25T04:52:20.96 0.3 undecidable manual S 195 31.4463 101 -0.26 71
IV.PII.HHZ. 2020-04-25T04:52:20.33 0.3 undecidable manual P 314 53.3022 50 -0.08 71
IV.MAGO.CHZ. 2020-04-25T04:52:20.60 0.1 undecidable manual S 245 30.6471 101 -0.36 93
IV.RIBO.EHZ.01 2020-04-25T04:52:19.47 0.3 undecidable manual P 176 48.9177 50 -0.25 69
IV.CSNT.HHZ. 2020-04-25T04:52:18.62 0.1 undecidable manual S 68 24.9528 104 -0.41 92
IV.TRIF.CHZ. 2020-04-25T04:52:16.64 0.1 undecidable manual P 195 31.4463 101 0.11 98
IV.MAGO.CHZ. 2020-04-25T04:52:16.64 0.3 undecidable manual P 245 30.6471 101 0.26 71
IV.CSNT.HHZ. 2020-04-25T04:52:15.31 0.1 undecidable manual P 68 24.9528 104 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:1.3 0.00011364952999999999 0.08 AML other m 2020-04-25T04:52:18.85
IV.CSNT.HHN. ML:1.4 0.000157769365 0.0992 AML other m 2020-04-25T04:52:18.76
IV.MAGO.CHE. ML:1.6 0.00017582965 0.1056 AML other m 2020-04-25T04:52:22.24
IV.MAGO.CHN. ML:1.7 0.00026377970000000003 0.1024 AML other m 2020-04-25T04:52:21.49
IV.TRIF.CHE. ML:1.6 0.00021000180000000003 0.1856 AML other m 2020-04-25T04:52:22.32
IV.TRIF.CHN. ML:1.6 0.0002108513 0.1344 AML other m 2020-04-25T04:52:22.27
IV.RIBO.EHE.01 ML:1.3 0.000051508995000000004 0.1216 AML other m 2020-04-25T04:52:26.31
IV.PII.HHN. ML:1.3 0.00004440753 0.3392 AML other m 2020-04-25T04:52:28.85
IV.PII.HHE. ML:1.2 0.00003609909 0.3584 AML other m 2020-04-25T04:52:30.26
GU.POPM.HHN. ML:1.5 0.000047171135 0.2368 AML other m 2020-04-25T04:52:36.75
IV.MOMA.HHE. ML:1.9 0.00004720961 0.1792 AML other m 2020-04-25T04:52:59.99
IV.MOMA.HHN. ML:1.7 0.000030321775000000003 0.2208 AML other m 2020-04-25T04:52:59.85
GU.POPM.HHE. ML:1.4 0.00003517561 0.32 AML other m 2020-04-25T04:52:36.89
IV.CRE.HHN. ML:1.2 0.000019566134999999998 0.6016 AML other m 2020-04-25T04:52:36.11
IV.CRE.HHE. ML:0.9 0.000012479145 0.4 AML other m 2020-04-25T04:52:37.59
IV.CELB.HHN. ML:1.3 0.000022384355000000002 0.08 AML other m 2020-04-25T04:52:42.64
IV.CELB.HHE. ML:1.4 0.000024838715 0.08 AML other m 2020-04-25T04:52:42.54
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