Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 15-04-2020 and time 22:07:14 (UTC) in region 6 km NW Chiusdino (SI)

A magnitude ML 2.1 earthquake occured in region: 6 km NW Chiusdino (SI), on

  • 15-04-2020 22:07:14 (UTC)
  • 16-04-2020 00:07:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1830, 11.0310 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.

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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
Chiusdino SI 6 1903 1903
Montieri GR 6 1204 3107
Radicondoli SI 9 914 4021
Castelnuovo di Val di Cecina PI 10 2231 6252
Monticiano SI 13 1571 7823
Monterotondo Marittimo GR 15 1371 9194
Casole d'Elsa SI 18 3897 13091
Pomarance PI 18 5897 18988
Massa Marittima GR 19 8375 27363
Sovicille SI 19 10116 37479

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km SW of Siena (53903 inhabitants)
47 Km N of Grosseto (82087 inhabitants)
65 Km S of Scandicci (50609 inhabitants)
68 Km S of Firenze (382808 inhabitants)
71 Km SE of Livorno (159219 inhabitants)
76 Km W of Arezzo (99543 inhabitants)
78 Km S of Prato (191150 inhabitants)
78 Km SE of Pisa (89158 inhabitants)
84 Km S of Pistoia (90315 inhabitants)
85 Km SE of Lucca (89046 inhabitants)
99 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 2.1 2020-04-15
22:07:14		 43.1828 11.0312 6 2020-07-18
21:08:33		 Bollettino Sismico Italiano INGV 78439031
Reviewed
Rev100 		ML 2.1 2020-04-15
22:07:14		 43.1797 11.0348 7 2020-04-15
22:19:08		 Sala Sismica INGV-Roma 78252231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-15 22:07:14 ± 0.08
Latitude 43.1828 ± 0.0036
Longitude 11.0312 ± 0.0062
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 78439031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 435
Semi-minor axis of confidence ellipse (meter) 366
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 112
Circular confidence region, given by single value of horizontal uncertainty (meter) 440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 43
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.48118
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 48
Type of magnitude ML
Reference to an origin 78439031
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-04-21 07:14:20

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 48
Type of magnitude ML
Reference to an origin 78252231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-15 22:19:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ROSPO.HHZ. 2020-04-15T22:08:43.93 3.0 undecidable manual Sn 3.92 0
IV.MILN.HHZ. 2020-04-15T22:08:34.67 3.0 undecidable manual Sn 3.72 0
MN.VSL.HHZ. 2020-04-15T22:08:16.32 3.0 negative manual Pn 1.5 0
GU.POPM.HHZ. 2020-04-15T22:07:43.91 0.3 undecidable manual S 347 98.124 50 -0.61 56
IV.RONT.HHZ. 2020-04-15T22:07:43.96 0.3 undecidable manual S 20 95.5377 50 0.14 63
IV.RINC.HHZ. 2020-04-15T22:07:42.28 0.3 undecidable manual S 30 90.7425 50 -0.26 62
GU.GRAM.HHZ. 2020-04-15T22:07:42.72 0.6 undecidable manual P 332 164.4132 50 0.56 32
IV.MAON.HHZ. 2020-04-15T22:07:41.42 0.3 undecidable manual S 174 84.1491 50 0.65 56
IV.RUFI.EHZ. 2020-04-15T22:07:39.71 0.3 undecidable manual S 28 82.251 50 -0.56 59
IV.PII.HHZ. 2020-04-15T22:07:37.13 0.6 undecidable manual S 326 72.372 50 -0.5 41
IV.PIEI.HHZ. 2020-04-15T22:07:36.85 0.3 undecidable manual P 72 127.4724 50 0.39 56
IV.APEC.HHZ. 2020-04-15T22:07:35.33 0.3 undecidable manual P 69 119.4915 50 0.09 61
IV.ATPI.EHZ. 2020-04-15T22:07:34.69 0.3 undecidable manual P 75 114.5964 50 0.21 60
TV.SF04.EHZ. 2020-04-15T22:07:34.93 0.3 undecidable manual S 127 63.9915 50 -0.46 63
TV.SF01.EHZ. 2020-04-15T22:07:33.62 0.3 undecidable manual S 133 59.5959 50 -0.62 60
IV.SFI.EHZ. 2020-04-15T22:07:33.24 0.3 undecidable manual P 39 103.5186 50 0.47 58
GU.CARD.HHZ. 2020-04-15T22:07:33.09 0.1 undecidable manual P 335 103.4187 50 0.34 79
IV.SEI.HHZ. 2020-04-15T22:07:32.40 0.6 undecidable manual P 15 100.122 50 0.14 42
IV.ATMI.HHZ. 2020-04-15T22:07:32.46 0.3 undecidable manual P 80 101.3208 50 0.02 64
IV.SSP9.EHZ. 2020-04-15T22:07:32.32 0.3 undecidable manual P 64 98.7234 50 0.28 61
IV.RONT.HHZ. 2020-04-15T22:07:32.42 0.3 undecidable manual P 20 95.5377 50 0.88 50
IV.ARCI.HHZ. 2020-04-15T22:07:31.44 0.3 undecidable manual S 135 51.4152 50 -0.61 61
GU.POPM.HHZ. 2020-04-15T22:07:31.91 0.1 undecidable manual P 347 98.124 50 -0.04 85
IV.RINC.HHZ. 2020-04-15T22:07:31.21 0.1 undecidable manual P 30 90.7425 50 0.4 80
IV.MGAB.HHZ. 2020-04-15T22:07:31.38 0.1 undecidable manual P 109 92.6406 50 0.29 82
IV.MAON.HHZ. 2020-04-15T22:07:30.54 0.1 undecidable manual P 174 84.1491 50 0.75 72
IV.CRE.HHZ. 2020-04-15T22:07:30.71 0.3 undecidable manual P 57 88.5447 50 0.24 63
IV.MPPT.EHZ. 2020-04-15T22:07:29.80 0.1 undecidable manual P 3 86.0472 50 -0.29 83
IV.RUFI.EHZ. 2020-04-15T22:07:29.45 0.3 undecidable manual P 28 82.251 50 -0.04 66
IV.SACS.HHZ. 2020-04-15T22:07:29.33 0.1 undecidable manual P 117 80.2641 50 0.13 87
IV.CASP.HHZ. 2020-04-15T22:07:29.60 0.3 undecidable manual S 197 45.5211 50 -0.87 55
IV.CRMI.HHZ. 2020-04-15T22:07:28.32 0.3 undecidable manual P 357 68.0763 50 1 50
IV.PII.HHZ. 2020-04-15T22:07:27.90 0.3 positive manual P 326 72.372 50 -0.08 67
TV.SF04.EHZ. 2020-04-15T22:07:26.56 0.1 positive manual P 127 63.9915 50 -0.12 90
TV.SF01.EHZ. 2020-04-15T22:07:26.25 0.1 undecidable manual P 133 59.5959 50 0.23 88
IV.MAGO.CHE. 2020-04-15T22:07:25.46 0.3 undecidable manual S 288 31.746 101 -0.56 64
IV.ARCI.HHZ. 2020-04-15T22:07:24.52 0.1 undecidable manual P 135 51.4152 50 -0.23 90
IV.RIBO.EHZ.01 2020-04-15T22:07:23.69 0.1 undecidable manual S 177 25.9518 103 -0.36 91
IV.CASP.HHZ. 2020-04-15T22:07:23.93 0.1 undecidable manual P 197 45.5211 50 0.09 93
IV.CSNT.HHZ. 2020-04-15T22:07:21.84 0.1 positive manual P 33 38.3283 99 -0.73 79
IV.RIBO.EHZ.01 2020-04-15T22:07:20.30 0.1 negative manual P 177 25.9518 103 0.16 95
IV.MAGO.CHE. 2020-04-15T22:07:20.88 0.1 positive manual P 288 31.746 101 -0.39 90
IV.TRIF.CHZ. 2020-04-15T22:07:19.93 0.1 undecidable manual S 234 12.876 116 0.19 97
IV.FROS.CHZ. 2020-04-15T22:07:18.74 0.3 undecidable manual S 74 10.5783 121 -0.28 72
IV.TRIF.CHZ. 2020-04-15T22:07:17.98 0.1 positive manual P 234 12.876 116 0.33 94
IV.FROS.CHZ. 2020-04-15T22:07:17.29 0.1 positive manual P 74 10.5783 121 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHN. ML:3.0 0.01485 0.62 AML other m 2020-04-15T22:07:19.25
IV.TRIF.CHE. ML:3.3 0.023899999999999998 0.2 AML other m 2020-04-15T22:07:20.67
IV.FROS.CHE. ML:3.0 0.013800000000000002 0.4 AML other m 2020-04-15T22:07:21.89
IV.TRIF.CHN. ML:3.2 0.0205 0.86 AML other m 2020-04-15T22:07:22.43
IV.CSNT.HHN. ML:2.3 0.0007395 1.04 AML other m 2020-04-15T22:07:27.12
IV.CSNT.HHE. ML:2.2 0.0006730000000000001 0.5 AML other m 2020-04-15T22:07:29.36
IV.ARCI.HHN. ML:2.0 0.00028000000000000003 0.48 AML other m 2020-04-15T22:07:33.18
IV.ARCI.HHE. ML:2.0 0.000257 0.92 AML other m 2020-04-15T22:07:33.54
TV.SF01.EHE. ML:2.1 0.0002475 0.4 AML other m 2020-04-15T22:07:34.71
IV.CRMI.HHN. ML:1.5 0.000054449999999999995 0.4 AML other m 2020-04-15T22:07:36.76
TV.SF04.EHE. ML:2.2 0.00032 1.44 AML other m 2020-04-15T22:07:39.82
IV.CRMI.HHE. ML:1.4 0.00004025 0.38 AML other m 2020-04-15T22:07:39.35
TV.SF01.EHN. ML:2.1 0.000256 0.82 AML other m 2020-04-15T22:07:39.83
IV.PIEI.HHE. ML:1.8 0.00004095 0.32 AML other m 2020-04-15T22:07:39.48
IV.PII.HHE. ML:2.0 0.00016599999999999997 0.34 AML other m 2020-04-15T22:07:39.48
TV.SF04.EHN. ML:2.2 0.0002845 0.28 AML other m 2020-04-15T22:07:39.72
IV.RUFI.EHE. ML:2.0 0.0001385 0.36 AML other m 2020-04-15T22:07:41.58
IV.RUFI.EHN. ML:2.3 0.000275 1.48 AML other m 2020-04-15T22:07:42.81
IV.MAON.HHE. ML:2.5 0.000377 1.02 AML other m 2020-04-15T22:07:42.84
IV.PII.HHN. ML:2.1 0.000202 0.32 AML other m 2020-04-15T22:07:42.57
IV.MPPT.EHN. ML:1.8 0.00007539999999999999 0.56 AML other m 2020-04-15T22:07:44.56
IV.RINC.HHE. ML:2.1 0.00015799999999999996 0.78 AML other m 2020-04-15T22:07:44.82
IV.MPPT.EHE. ML:1.9 0.00009165 1.64 AML other m 2020-04-15T22:07:44.96
IV.RINC.HHN. ML:2.1 0.000152 0.46 AML other m 2020-04-15T22:07:45.32
IV.MAON.HHN. ML:2.4 0.00032250000000000003 1.12 AML other m 2020-04-15T22:07:45.56
IV.RONT.HHN. ML:2.6 0.0004645 0.78 AML other m 2020-04-15T22:07:45.57
IV.CRE.HHN. ML:2.2 0.00017099999999999998 0.66 AML other m 2020-04-15T22:07:45.63
IV.SACS.HHE. ML:1.5 0.00003990000000000001 1.42 AML other m 2020-04-15T22:07:47.75
GU.POPM.HHE. ML:2.2 0.0001535 1.18 AML other m 2020-04-15T22:07:47.69
IV.MGAB.HHN. ML:1.6 0.000047850000000000004 0.26 AML other m 2020-04-15T22:07:47.84
IV.CRE.HHE. ML:2.0 0.0001083 0.54 AML other m 2020-04-15T22:07:48.32
IV.SACS.HHN. ML:1.5 0.00003965 1.4 AML other m 2020-04-15T22:07:48.20
GU.POPM.HHN. ML:2.2 0.00014250000000000002 0.84 AML other m 2020-04-15T22:07:48.36
IV.RONT.HHE. ML:2.7 0.000589 1.5 AML other m 2020-04-15T22:07:48.12
IV.ATMI.HHE. ML:2.2 0.00016450000000000001 0.56 AML other m 2020-04-15T22:07:49.01
GU.CARD.HHE. ML:1.9 0.00007175000000000001 1.34 AML other m 2020-04-15T22:07:49.84
GU.CARD.HHN. ML:1.9 0.00008075 0.36 AML other m 2020-04-15T22:07:50.22
IV.MGAB.HHE. ML:1.6 0.00004770000000000001 0.6 AML other m 2020-04-15T22:07:51.72
IV.SEI.HHE. ML:2.3 0.00020250000000000002 0.46 AML other m 2020-04-15T22:07:52.44
IV.SSP9.EHE. ML:2.0 0.00010775 0.42 AML other m 2020-04-15T22:07:52.76
IV.ATMI.HHN. ML:2.4 0.00023799999999999998 0.68 AML other m 2020-04-15T22:07:53.43
IV.ATPI.EHN. ML:1.9 0.000058800000000000006 1.12 AML other m 2020-04-15T22:07:54.95
IV.SEI.HHN. ML:2.5 0.0003375 1.52 AML other m 2020-04-15T22:07:54.80
IV.APEC.HHN. ML:2.0 0.0000805 1.02 AML other m 2020-04-15T22:07:55.85
IV.ATPI.EHE. ML:1.8 0.000057300000000000004 0.6 AML other m 2020-04-15T22:07:56.32
IV.APEC.HHE. ML:2.0 0.0000724 0.94 AML other m 2020-04-15T22:07:58.27
IV.PIEI.HHN. ML:1.6 0.00002785 0.52 AML other m 2020-04-15T22:08:01.27
IV.SSP9.EHN. ML:2.0 0.00008915000000000001 0.44 AML other m 2020-04-15T22:08:07.30
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
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