Earthquake with magnitude of ML 1.2 on date 25-03-2021 and time 23:27:51 (Italy) in region 2 km W Castelnuovo di Val di Cecina (PI)

A magnitude ML 1.2 earthquake occured in region: 2 km W Castelnuovo di Val di Cecina (PI), on

  • 25-03-2021 22:27:51 (UTC)
  • 25-03-2021 23:27:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.202, 10.879 at 6 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
Castelnuovo di Val di Cecina PI 2 2231 2231
Monterotondo Marittimo GR 6 1371 3602
Pomarance PI 11 5897 9499
Monteverdi Marittimo PI 14 758 10257
Montieri GR 14 1204 11461
Radicondoli SI 15 914 12375
Massa Marittima GR 17 8375 20750
Chiusdino SI 18 1903 22653

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km W of Siena (53903 inhabitants)
53 Km NW of Grosseto (82087 inhabitants)
60 Km SE of Livorno (159219 inhabitants)
67 Km SW of Scandicci (50609 inhabitants)
69 Km SE of Pisa (89158 inhabitants)
70 Km SW of Firenze (382808 inhabitants)
78 Km S of Prato (191150 inhabitants)
78 Km SE of Lucca (89046 inhabitants)
82 Km S of Pistoia (90315 inhabitants)
86 Km W of Arezzo (99543 inhabitants)
90 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
Bulletin
Rev1000
ML 1.2 2021-03-25
22:27:51
43.2022 10.8788 6 2021-07-12
16:55:05
Bollettino Sismico Italiano INGV 88910081
Reviewed
Rev100
ML 1.2 2021-03-25
22:27:51
43.1925 10.8798 7 2021-03-25
22:59:22
Sala Sismica INGV-Roma 88471341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-25 22:27:51 ± 0.1
Latitude 43.2022 ± 0.0054
Longitude 10.8788 ± 0.0074
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88910081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 511
Semi-minor axis of confidence ellipse (meter) 479
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 40
Circular confidence region, given by single value of horizontal uncertainty (meter) 510
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 114
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) 0.08903
Epicentral distance of station farthest from the epicenter (degree) 0.6682
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 88910081
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-08 06:00:40

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 88471341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-25 22:59:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSNT.HHE. 2021-03-25T22:28:06.48 0.3 undecidable manual S 48 0.4038 50 -0.59 63
IV.CELB.HHZ. 2021-03-25T22:28:05.36 0.3 undecidable manual P 227 0.6682 50 0.37 63
IV.RIBO.EHZ.01 2021-03-25T22:28:02.16 0.3 undecidable manual S 154 0.2806 100 -0.29 70
IV.ARCI.HHN. 2021-03-25T22:28:02.94 0.3 undecidable manual P 129 0.5594 50 -0.19 67
IV.CSNT.HHE. 2021-03-25T22:28:00.58 0.3 undecidable manual P 48 0.4038 50 0.11 71
IV.CASP.HHN. 2021-03-25T22:28:00.80 0.1 undecidable manual P 181 0.411 50 0.19 92
IV.FROS.CHZ. 2021-03-25T22:27:59.63 0.3 undecidable manual S 88 0.2023 104 0.15 73
IV.MAGO.CHZ. 2021-03-25T22:27:58.19 0.1 undecidable manual S 294 0.1763 106 -0.32 94
IV.RIBO.EHZ.01 2021-03-25T22:27:57.80 0.1 undecidable manual P 154 0.2806 100 -0.01 98
IV.FROS.CHZ. 2021-03-25T22:27:56.42 0.1 undecidable manual P 88 0.2023 104 0.33 93
IV.MAGO.CHZ. 2021-03-25T22:27:55.76 0.1 undecidable manual P 294 0.1763 106 0.23 96
IV.TRIF.CHZ. 2021-03-25T22:27:55.14 0.1 undecidable manual S 169 0.089 120 -0.26 97
IV.TRIF.CHZ. 2021-03-25T22:27:53.84 0.1 undecidable manual P 169 0.089 120 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHN. ML:1.4 0.0004075 0.68 AML other m 2021-03-25T22:27:56.49
IV.TRIF.CHE. ML:1.4 0.00041 0.96 AML other m 2021-03-25T22:27:56.76
IV.MAGO.CHE. ML:1.1 0.0001065 0.94 AML other m 2021-03-25T22:27:59.57
IV.FROS.CHE. ML:1 6.72E-5 0.62 AML other m 2021-03-25T22:28:00.27
IV.FROS.CHN. ML:1.1 8.47E-5 0.28 AML other m 2021-03-25T22:28:00.44
IV.MAGO.CHN. ML:1.1 0.00010275 1.06 AML other m 2021-03-25T22:28:00.91
IV.RIBO.EHE.01 ML:1 4.3185705E-5 0.1664 AML other m 2021-03-25T22:28:03.99
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