Earthquake with magnitude of ML 1.8 on date 02-04-2020 and time 13:36:13 (Italy) in region 4 km W San Gimignano (SI)

A magnitude ML 1.8 earthquake occured in region: 4 km W San Gimignano (SI), on

  • 02-04-2020 11:36:13 (UTC)
  • 02-04-2020 13:36:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.48, 10.99 at 10 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.

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 10 3700 32511
Colle di Val d'Elsa SI 12 21620 54131
Poggibonsi SI 13 29196 83327
Castelfiorentino FI 14 17504 100831
Volterra PI 14 10519 111350
Barberino Val d'Elsa FI 16 4386 115736
Casole d'Elsa SI 16 3897 119633
Tavarnelle Val di Pesa FI 17 7800 127433
Montespertoli FI 19 13537 140970

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NW of Siena (53903 inhabitants)
34 Km SW of Scandicci (50609 inhabitants)
38 Km SW of Firenze (382808 inhabitants)
45 Km S of Prato (191150 inhabitants)
51 Km S of Pistoia (90315 inhabitants)
54 Km E of Pisa (89158 inhabitants)
56 Km E of Livorno (159219 inhabitants)
56 Km SE of Lucca (89046 inhabitants)
72 Km W of Arezzo (99543 inhabitants)
74 Km SE of Viareggio (62467 inhabitants)
81 Km N of Grosseto (82087 inhabitants)
92 Km SE of Massa (69479 inhabitants)
98 Km SE of Carrara (63133 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.8 2020-04-02
11:36:13
43.48 10.99 10 2020-04-02
11:45:27
Sala Sismica INGV-Roma 77788881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-02 11:36:13 ± 0.16
Latitude 43.48 ± 0.00
Longitude 10.99 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77788881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 567
Semi-minor axis of confidence ellipse (meter) 485
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 97
Circular confidence region, given by single value of horizontal uncertainty (meter) 570
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 23
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
Epicentral distance of station farthest from the epicenter (degree) 0.80939
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 77788881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-02 11:45:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
XK.GIZZ.HHZ. 2020-04-02T11:37:46.80 3.0 negative manual Pn 4.02 0
CR.STON.BHZ. 2020-04-02T11:37:46.36 3.0 negative manual Pg 17.92 0
OX.MPRI.HHZ. 2020-04-02T11:37:41.89 3.0 undecidable manual Sn 0.77 0
IV.ERC.EHZ. 2020-04-02T11:37:41.46 3.0 undecidable manual Pn 4.23 0
IV.VVLD.HHZ. 2020-04-02T11:37:38.60 3.0 undecidable manual Sg 10.5 0
IV.VIVA.HHZ. 2020-04-02T11:37:25.11 3.0 undecidable manual Sg 5.48 0
CR.ZAG.BHZ. 2020-04-02T11:37:22.70 3.0 undecidable manual Pn 3.89 0
CH.FUORN.HHZ. 2020-04-02T11:37:13.12 3.0 undecidable manual Pg 9.56 0
IV.ROSPO.HHZ. 2020-04-02T11:37:06.96 3.0 positive manual Pn 3.05 0
IV.VAGA.HHZ. 2020-04-02T11:37:04.48 3.0 undecidable manual Pn 0.31 0
IV.LPEL.HHZ. 2020-04-02T11:36:57.77 3.0 positive manual Pn -0.69 0
IV.VIVA.HHZ. 2020-04-02T11:36:51.35 3.0 undecidable manual Pn 0.79 0
IT.RMVT.HGZ. 2020-04-02T11:36:51.34 3.0 negative manual Pg 4.78 0
IV.CESI.HHZ. 2020-04-02T11:36:41.61 3.0 undecidable manual P 0.73 0
IV.CASP.. 2020-04-02T11:36:36.83 3.0 undecidable manual S 0
IV.BDI.HHZ. 2020-04-02T11:36:35.41 0.6 undecidable manual S 334 0.6475 50 -0.05 47
IV.SEI.HHZ. 2020-04-02T11:36:35.24 0.3 undecidable manual S 25 0.6295 50 0.29 67
GU.POPM.HHZ. 2020-04-02T11:36:33.36 0.6 undecidable manual S 343 0.5873 50 -0.34 44
IV.RUFI.EHZ. 2020-04-02T11:36:31.67 0.6 undecidable manual S 46 0.5162 50 0.1 47
IV.MPPT.EHZ. 2020-04-02T11:36:29.99 0.6 undecidable manual S 8 0.4802 50 -0.53 43
TV.SF04.EHZ. 2020-04-02T11:36:29.77 0.3 undecidable manual P 143 0.8094 50 0.8 54
IV.CASP.HHZ. 2020-04-02T11:36:28.75 3.0 undecidable manual P 0
IV.CRE.HHZ. 2020-04-02T11:36:28.49 3.0 negative manual P 0.1 0
IV.BDI.HHZ. 2020-04-02T11:36:26.46 0.1 undecidable manual P 334 0.6475 50 0.26 89
IV.TRIF.CHZ. 2020-04-02T11:36:26.85 0.3 undecidable manual S 190 0.3732 50 -0.49 67
IV.SEI.HHZ. 2020-04-02T11:36:26.43 0.3 undecidable manual P 25 0.6295 50 0.53 63
GU.CARD.HHZ. 2020-04-02T11:36:26.31 0.1 undecidable manual P 326 0.6565 50 -0.05 93
GU.POPM.HHZ. 2020-04-02T11:36:25.50 0.3 undecidable manual P 343 0.5873 50 0.32 67
IV.MAGO.CHZ. 2020-04-02T11:36:25.55 0.6 undecidable manual S 229 0.3202 50 -0.23 48
IV.CRMI.HHZ. 2020-04-02T11:36:24.91 0.3 undecidable manual S 358 0.313 50 -0.66 64
IV.RUFI.EHZ. 2020-04-02T11:36:24.15 0.1 undecidable manual P 46 0.5162 50 0.19 93
IV.FROS.CHZ. 2020-04-02T11:36:24.87 0.3 undecidable manual S 156 0.2968 50 -0.22 72
IV.MPPT.EHZ. 2020-04-02T11:36:23.48 0.3 undecidable manual P 8 0.4802 50 0.14 71
IV.PII.HHZ. 2020-04-02T11:36:22.09 0.1 negative manual P 305 0.4146 50 -0.13 96
IV.CSNT.HHZ. 2020-04-02T11:36:22.07 0.3 undecidable manual S 92 0.2158 112 -0.46 70
IV.TRIF.CHZ. 2020-04-02T11:36:21.74 0.3 undecidable manual P 190 0.3732 50 0.23 71
IV.FROS.CHZ. 2020-04-02T11:36:20.31 0.1 negative manual P 156 0.2968 50 0.1 99
IV.CRMI.HHZ. 2020-04-02T11:36:20.40 0.1 undecidable manual P 358 0.313 50 -0.09 99
IV.MAGO.CHZ. 2020-04-02T11:36:20.72 0.1 positive manual P 229 0.3202 50 0.11 98
IV.CSNT.HHZ. 2020-04-02T11:36:18.60 0.1 negative manual P 92 0.2158 112 -0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:2.2 0.000912 0.3 AML other m 2020-04-02T11:36:22.19
IV.CSNT.HHE. ML:2 0.0006595 0.26 AML other m 2020-04-02T11:36:22.29
IV.CRMI.HHN. ML:1.2 6.605E-5 1.6 AML other m 2020-04-02T11:36:25.96
IV.CRMI.HHE. ML:1.4 0.00011 0.56 AML other m 2020-04-02T11:36:25.01
IV.MAGO.CHN. ML:1.8 0.0002255 0.12 AML other m 2020-04-02T11:36:25.88
IV.FROS.CHE. ML:2.4 0.00123 0.34 AML other m 2020-04-02T11:36:25.95
IV.FROS.CHN. ML:2.3 0.0009875 1.56 AML other m 2020-04-02T11:36:26.94
IV.MAGO.CHE. ML:1.8 0.000252 0.34 AML other m 2020-04-02T11:36:26.03
IV.MPPT.EHE. ML:1.6 0.00010435 0.42 AML other m 2020-04-02T11:36:30.11
IV.MPPT.EHN. ML:1.6 8.495E-5 0.4 AML other m 2020-04-02T11:36:32.46
GU.POPM.HHE. ML:1.8 0.0001195 0.86 AML other m 2020-04-02T11:36:35.21
GU.POPM.HHN. ML:1.9 0.0001385 0.88 AML other m 2020-04-02T11:36:36.52
GU.CARD.HHN. ML:1.8 9.305E-5 1.22 AML other m 2020-04-02T11:36:37.08
IV.BDI.HHN. ML:1.6 7.175E-5 0.52 AML other m 2020-04-02T11:36:37.41
GU.CARD.HHE. ML:1.7 7.35E-5 0.48 AML other m 2020-04-02T11:36:37.54
IV.SEI.HHN. ML:2.1 0.0001875 0.3 AML other m 2020-04-02T11:36:38.27
IV.SEI.HHE. ML:1.6 6.85E-5 0.88 AML other m 2020-04-02T11:36:38.61
IV.BDI.HHE. ML:1.8 9.215E-5 0.88 AML other m 2020-04-02T11:36:38.81
IV.CRE.HHN. ML:1.6 4.77E-5 0.38 AML other m 2020-04-02T11:36:39.07
IV.CRE.HHE. ML:1.4 3.635E-5 0.6 AML other m 2020-04-02T11:36:41.25
TV.SF04.EHE. ML:1.8 7.1E-5 0.3 AML other m 2020-04-02T11:36:44.52
TV.SF04.EHN. ML:1.8 7.6665E-5 0.26 AML other m 2020-04-02T11:36:44.53
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download