Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 16-03-2020 and time 13:47:29 (UTC) in region 3 km SW Monteroni d'Arbia (SI)

A magnitude ML 1.4 earthquake occured in region: 3 km SW Monteroni d'Arbia (SI), on

  • 16-03-2020 13:47:29 (UTC)
  • 16-03-2020 14:47:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.2100, 11.4110 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.

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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
Monteroni d'Arbia SI 3 9088 9088
Murlo SI 5 2389 11477
Buonconvento SI 10 3173 14650
Asciano SI 12 7118 21768
Siena SI 14 53903 75671
San Giovanni d'Asso SI 16 853 76524
Sovicille SI 17 10116 86640
Castelnuovo Berardenga SI 17 9097 95737
Montalcino SI 18 5093 100830
Rapolano Terme SI 18 5249 106079

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km SE of Siena (53903 inhabitants)
48 Km SW of Arezzo (99543 inhabitants)
55 Km NE of Grosseto (82087 inhabitants)
64 Km S of Firenze (382808 inhabitants)
64 Km SE of Scandicci (50609 inhabitants)
79 Km SE of Prato (191150 inhabitants)
80 Km W of Perugia (166134 inhabitants)
90 Km SE of Pistoia (90315 inhabitants)
97 Km E of Livorno (159219 inhabitants)
99 Km SE of Pisa (89158 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 2020-03-16
13:47:29		 43.2098 11.411 11 2020-07-18
21:08:26		 Bollettino Sismico Italiano INGV 77327121
Reviewed
Rev100 		ML 1.5 2020-03-16
13:47:29		 43.2195 11.4233 10 2020-03-16
13:58:05		 Sala Sismica INGV-Roma 77307331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-16 13:47:29 ± 0.21
Latitude 43.2098 ± 0.0063
Longitude 11.4110 ± 0.0123
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 77327121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 860
Semi-minor axis of confidence ellipse (meter) 671
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 274
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.80759
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 77307331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-16 13:58:05

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 77327121
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-03-17 16:33:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2020-03-16T13:47:51.70 0.3 undecidable manual S 25 71.8725 50 0.17 66
IV.CASP.HHZ. 2020-03-16T13:47:50.10 0.6 undecidable manual S 224 64.1913 50 0.62 40
IV.CRE.HHZ. 2020-03-16T13:47:49.10 0.3 undecidable manual S 44 62.8926 50 -0.03 69
IV.SF11.. 2020-03-16T13:47:46.24 3.0 undecidable manual Sg 0
IV.MAON.HNE. 2020-03-16T13:47:45.66 1.0 undecidable manual P 195 89.6436 50 0.59 19
IV.PARC.HHE. 2020-03-16T13:47:44.18 0.6 undecidable manual P 54 82.5507 50 0.2 43
IV.ARCI.HHZ. 2020-03-16T13:47:43.00 0.6 undecidable manual S 172 40.0266 50 -0.03 48
IV.TRIF.CHZ. 2020-03-16T13:47:43.40 1.0 undecidable manual S 256 42.4242 50 -0.28 23
IV.BLLA.EHZ. 2020-03-16T13:47:43.41 3.0 undecidable manual P 0
TV.SF13.HHZ. 2020-03-16T13:47:43.80 0.3 undecidable manual S 159 46.62 50 -0.98 53
IV.ASQU.HHZ. 2020-03-16T13:47:43.94 1.0 undecidable manual P 25 71.8725 50 1.61 12
IV.CASP.HHZ. 2020-03-16T13:47:42.05 0.3 undecidable manual P 224 64.1913 50 0.9 53
IV.MAGO.CHZ. 2020-03-16T13:47:41.02 0.6 undecidable manual P 277 61.2942 50 0.32 43
IV.SACS.HHZ. 2020-03-16T13:47:41.15 3.0 undecidable manual P 0
IV.CRE.HHZ. 2020-03-16T13:47:41.39 0.1 undecidable manual P 44 62.8926 50 0.44 84
IV.SF11.. 2020-03-16T13:47:41.69 3.0 undecidable manual Pg 0
IV.CSNT.HHZ. 2020-03-16T13:47:40.00 0.3 undecidable manual S 342 30.747 50 -0.56 65
TV.SF14.HHZ. 2020-03-16T13:47:39.32 0.3 undecidable manual P 162 53.1024 50 -0.11 69
TV.SF13.HHZ. 2020-03-16T13:47:38.39 0.1 undecidable manual P 159 46.62 50 -0.04 95
IV.FROS.CHZ. 2020-03-16T13:47:37.50 0.3 undecidable manual S 270 20.5683 117 -0.29 71
IV.ARCI.HHZ. 2020-03-16T13:47:37.26 0.1 undecidable manual P 172 40.0266 50 -0.16 94
IV.TRIF.CHZ. 2020-03-16T13:47:37.95 0.1 undecidable manual P 256 42.4242 50 0.15 93
IV.CSNT.HHZ. 2020-03-16T13:47:35.50 0.1 undecidable manual P 342 30.747 50 -0.5 89
IV.FROS.CHZ. 2020-03-16T13:47:34.39 0.1 undecidable manual P 270 20.5683 117 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHE. ML:0.0 0.0005265 0.2 AML other m 2020-03-16T13:47:37.86
IV.FROS.CHN. ML:0.0 0.000504 0.82 AML other m 2020-03-16T13:47:38.88
IV.CSNT.HHE. ML:0.0 0.000165 0.28 AML other m 2020-03-16T13:47:40.39
IV.CSNT.HHN. ML:0.0 0.000154 0.6 AML other m 2020-03-16T13:47:40.61
IV.ARCI.HHE. ML:0.0 0.0000637 0.18 AML other m 2020-03-16T13:47:45.25
IV.ARCI.HHN. ML:0.0 0.0000965 1.44 AML other m 2020-03-16T13:47:46.98
IV.CRE.HHN. ML:0.0 0.000042635809999999997 0.3008 AML other m 2020-03-16T13:47:51.53
IV.CRE.HHE. ML:0.0 0.000033996815 0.224 AML other m 2020-03-16T13:47:50.25
IV.CASP.HHN. ML:0.0 0.000031193749999999996 0.3392 AML other m 2020-03-16T13:47:53.33
IV.ARCI.HNE. ML:1.3 0.000076150515 0.1792 AML other m 2020-03-16T13:47:45.25
IV.CASP.HHE. ML:1.1 0.00002548785 0.7936 AML other m 2020-03-16T13:47:52.76
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