Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 16-03-2020 and time 14:56:31 (Italy) in region 3 km SW Monteroni d'Arbia (SI)

A magnitude ML 1.5 earthquake occured in region: 3 km SW Monteroni d'Arbia (SI), on

  • 16-03-2020 13:56:31 (UTC)
  • 16-03-2020 14:56:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.2150, 11.3990 at 11 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 11 3173 14650
Siena SI 13 53903 68553
Asciano SI 13 7118 75671
Sovicille SI 16 10116 85787
Castelnuovo Berardenga SI 17 9097 94884
San Giovanni d'Asso SI 17 853 95737
Montalcino SI 19 5093 100830
Rapolano Terme SI 19 5249 106079
Monticiano SI 20 1571 107650

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km SE of Siena (53903 inhabitants)
48 Km SW of Arezzo (99543 inhabitants)
56 Km NE of Grosseto (82087 inhabitants)
63 Km S of Firenze (382808 inhabitants)
63 Km S of Scandicci (50609 inhabitants)
78 Km SE of Prato (191150 inhabitants)
81 Km W of Perugia (166134 inhabitants)
89 Km SE of Pistoia (90315 inhabitants)
96 Km E of Livorno (159219 inhabitants)
98 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 1.5 2020-03-16
13:56:31		 43.2147 11.3993 11 2020-07-18
21:08:26		 Bollettino Sismico Italiano INGV 77354421
Reviewed
Rev100 		ML 1.5 2020-03-16
13:56:31		 43.222 11.4078 11 2020-03-16
14:13:45		 Sala Sismica INGV-Roma 77307421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-16 13:56:31 ± 0.15
Latitude 43.2147 ± 0.0054
Longitude 11.3993 ± 0.0086
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 77354421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 606
Semi-minor axis of confidence ellipse (meter) 508
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 141
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 26
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.81299
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 77307421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-16 14:13:45

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 77354421
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-03-18 17:10:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RINC.HHN. 2020-03-16T13:56:54.60 0.6 undecidable manual S 13 76.368 50 0.1 45
IV.ASQU.HHZ. 2020-03-16T13:56:53.30 0.6 undecidable manual S 26 71.7726 50 0.03 46
IV.ATMC.EHE. 2020-03-16T13:56:52.80 1.0 undecidable manual S 68 68.9754 50 0.26 22
IV.CASP.HHE. 2020-03-16T13:56:51.80 1.0 undecidable manual S 223 63.9915 50 0.62 20
IV.CRE.HHE. 2020-03-16T13:56:50.80 0.6 undecidable manual S 45 63.1923 50 -0.18 45
IV.CRMI.HHZ. 2020-03-16T13:56:48.51 3.0 undecidable manual S 0
IV.ATPC.HHE. 2020-03-16T13:56:47.30 0.3 undecidable manual P 71 90.243 50 0.35 62
IV.PARC.HHN. 2020-03-16T13:56:45.96 0.6 undecidable manual P 54 82.9503 50 0.13 44
TV.SF13.HHN. 2020-03-16T13:56:45.67 0.6 undecidable manual S 158 47.4192 50 -1.11 33
IV.RINC.HHN. 2020-03-16T13:56:45.24 0.6 undecidable manual P 13 76.368 50 0.43 42
IV.TRIF.CHN. 2020-03-16T13:56:45.10 1.0 undecidable manual S 255 41.7249 50 -0.14 24
IV.ATVO.HHN. 2020-03-16T13:56:45.88 0.6 undecidable manual P 77 83.4498 50 -0.01 45
IV.ASQU.HHZ. 2020-03-16T13:56:44.35 0.6 undecidable manual P 26 71.7726 50 0.25 44
IV.CRMI.HHZ. 2020-03-16T13:56:44.74 3.0 undecidable manual P 0
IV.ATMC.EHE. 2020-03-16T13:56:43.67 0.3 undecidable manual P 68 68.9754 50 0 69
IV.CELB.HHZ. 2020-03-16T13:56:43.77 3.0 undecidable manual P 0
IV.CASP.HHE. 2020-03-16T13:56:43.70 0.3 undecidable manual P 223 63.9915 50 0.81 56
IV.CRE.HHE. 2020-03-16T13:56:42.97 0.3 undecidable manual P 45 63.1923 50 0.19 67
IV.SACS.HHE. 2020-03-16T13:56:42.21 0.6 undecidable manual P 134 57.8976 50 0.24 45
IV.CSNT.HHZ. 2020-03-16T13:56:41.70 0.3 undecidable manual S 343 29.9478 50 -0.42 68
TV.SF13.HHN. 2020-03-16T13:56:40.05 0.3 undecidable manual P 158 47.4192 50 -0.3 68
IV.MCIV.CHN. 2020-03-16T13:56:40.99 0.6 undecidable manual P 155 53.3022 50 -0.27 45
TV.SF01.EHZ. 2020-03-16T13:56:40.48 0.6 undecidable manual P 163 46.62 50 0.26 46
IV.TRIF.CHN. 2020-03-16T13:56:39.74 0.1 undecidable manual P 255 41.7249 50 0.28 92
TV.SF04.EHZ. 2020-03-16T13:56:39.94 3.0 undecidable manual P -0.38 0
IV.RIBO.EHN.01 2020-03-16T13:56:39.60 0.3 undecidable manual P 224 41.0256 50 0.23 69
IV.FROS.CHZ. 2020-03-16T13:56:38.90 0.6 undecidable manual S 268 19.6692 118 -0.43 46
IV.ARCI.HHZ. 2020-03-16T13:56:38.95 0.1 undecidable manual P 171 40.7259 50 -0.36 90
IV.CSNT.HHZ. 2020-03-16T13:56:37.18 0.1 undecidable manual P 343 29.9478 50 -0.48 90
IV.FROS.CHZ. 2020-03-16T13:56:36.09 0.1 undecidable manual P 268 19.6692 118 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHE. ML:0.0 0.0003845 0.18 AML other m 2020-03-16T13:56:39.46
IV.FROS.CHN. ML:0.0 0.0003815925999999999 0.1792 AML other m 2020-03-16T13:56:39.57
IV.ARCI.HHN. ML:0.0 0.000084330235 0.2624 AML other m 2020-03-16T13:56:48.54
IV.ARCI.HHE. ML:0.0 0.00005827881 0.2432 AML other m 2020-03-16T13:56:49.68
TV.SF04.EHN. ML:1.4 0.000067422715 0.3968 AML other m 2020-03-16T13:56:50.09
TV.SF04.EHE. ML:1.5 0.00008627826499999999 0.2816 AML other m 2020-03-16T13:56:50.09
TV.SF01.EHN. ML:1.6 0.00010043801999999999 0.224 AML other m 2020-03-16T13:56:47.77
TV.SF01.EHE. ML:1.4 0.000065643535 0.2624 AML other m 2020-03-16T13:56:50.71
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