Earthquake with magnitude of ML 1.4 on date 02-04-2020 and time 11:47:30 (Italy) in region 4 km NW San Gimignano (SI)

A magnitude ML 1.4 earthquake occured in region: 4 km NW San Gimignano (SI), on

  • 02-04-2020 09:47:30 (UTC)
  • 02-04-2020 11:47:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4860, 11.0080 at 10 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
San Gimignano SI 4 7820 7820
Gambassi Terme FI 7 4870 12690
Certaldo FI 8 16121 28811
Montaione FI 11 3700 32511
Colle di Val d'Elsa SI 12 21620 54131
Poggibonsi SI 12 29196 83327
Castelfiorentino FI 14 17504 100831
Barberino Val d'Elsa FI 15 4386 105217
Volterra PI 15 10519 115736
Tavarnelle Val di Pesa FI 16 7800 123536
Casole d'Elsa SI 16 3897 127433
Montespertoli FI 18 13537 140970
Monteriggioni SI 20 9810 150780

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NW of Siena (53903 inhabitants)
33 Km SW of Scandicci (50609 inhabitants)
37 Km SW of Firenze (382808 inhabitants)
45 Km S of Prato (191150 inhabitants)
50 Km S of Pistoia (90315 inhabitants)
55 Km E of Pisa (89158 inhabitants)
57 Km E of Livorno (159219 inhabitants)
57 Km SE of Lucca (89046 inhabitants)
71 Km W of Arezzo (99543 inhabitants)
74 Km SE of Viareggio (62467 inhabitants)
81 Km N of Grosseto (82087 inhabitants)
93 Km SE of Massa (69479 inhabitants)
98 Km SE of Carrara (63133 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 2020-04-02
09:47:30
43.4863 11.0077 10 2020-07-18
21:08:40
Bollettino Sismico Italiano INGV 79997361
Reviewed
Rev100
ML 1.8 2020-04-02
09:47:28
43.6942 10.9942 12 2020-04-02
10:02:18
Sala Sismica INGV-Roma 77784261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-02 09:47:30 ± 0.15
Latitude 43.4863 ± 0.0054
Longitude 11.0077 ± 0.0124
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 79997361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 913
Semi-minor axis of confidence ellipse (meter) 601
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 85
Circular confidence region, given by single value of horizontal uncertainty (meter) 910.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.64841
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 79997361
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-08 09:24:01

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 77784261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-02 10:02:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FOSV.EHZ. 2020-04-02T09:48:15.69 3.0 undecidable manual S 1.37 0
IV.NARO.HHZ. 2020-04-02T09:48:10.12 3.0 undecidable manual S -0.96 0
IV.SARZ.HHZ. 2020-04-02T09:48:06.02 3.0 negative manual Pn 1 0
GU.CARD.HHZ. 2020-04-02T09:47:55.93 3.0 undecidable manual S 0.83 0
IV.MPPT.EHN. 2020-04-02T09:47:47.39 0.6 undecidable manual S 7 52.7028 50 -0.17 46
IV.TRIF.CHE. 2020-04-02T09:47:44.44 1.0 undecidable manual S 192 42.1245 50 -0.3 23
IV.BDI.HHZ. 2020-04-02T09:47:43.75 0.6 undecidable manual P 333 71.9724 50 0.27 43
IV.OSSC.HHZ. 2020-04-02T09:47:41.59 3.0 undecidable manual S 1.48 0
IV.FROS.CHZ. 2020-04-02T09:47:41.98 1.0 undecidable manual S 159 32.9448 50 -0.32 23
IV.MPPT.EHN. 2020-04-02T09:47:40.88 0.6 undecidable manual P 7 52.7028 50 0.37 44
IV.PII.HHZ. 2020-04-02T09:47:39.34 0.1 negative manual P 304 46.7199 50 -0.25 91
IV.CSNT.HHZ. 2020-04-02T09:47:39.34 0.6 undecidable manual S 94 22.755 114 -0.19 48
IV.TRIF.CHE. 2020-04-02T09:47:39.28 0.6 undecidable manual P 192 42.1245 50 0.41 45
IV.FROS.CHZ. 2020-04-02T09:47:37.58 0.1 undecidable manual P 159 32.9448 50 0.11 96
IV.MAGO.CHZ. 2020-04-02T09:47:37.98 0.3 undecidable manual P 230 36.8298 50 -0.08 72
IV.CSNT.HHZ. 2020-04-02T09:47:35.88 0.1 negative manual P 94 22.755 114 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:1.2 0.000101106165 0.224 AML other m 2020-04-02T09:47:39.43
IV.CSNT.HHE. ML:1.3 0.00012167160999999998 0.2624 AML other m 2020-04-02T09:47:39.54
IV.FROS.CHE. ML:1.7 0.00024136775 0.3712 AML other m 2020-04-02T09:47:43.04
IV.FROS.CHN. ML:1.6 0.00017475165 0.1664 AML other m 2020-04-02T09:47:43.21
IV.PII.HHN. ML:1.2 0.000043554839999999994 0.2816 AML other m 2020-04-02T09:47:46.35
IV.PII.HHE. ML:1.2 0.000039519765 0.2368 AML other m 2020-04-02T09:47:47.69
IV.BDI.HNE. ML:1.9 0.00011398394499999999 0.9152 AML other m 2020-04-02T09:48:16.18
IV.BDI.HNN. ML:1.9 0.00013355835 0.7616 AML other m 2020-04-02T09:48:03.59
IV.BDI.HHN. ML:0.8 0.000009460714 0.2816 AML other m 2020-04-02T09:47:55.44
IV.BDI.HHE. ML:1.0 0.00001582427 0.3968 AML other m 2020-04-02T09:47:55.94
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download