Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 20-04-2020 and time 01:07:16 (Italy) in region 7 km SW Sambuca Pistoiese (PT)

A magnitude ML 1.1 earthquake occured in region: 7 km SW Sambuca Pistoiese (PT), on

  • 19-04-2020 23:07:16 (UTC)
  • 20-04-2020 01:07:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0440, 10.9720 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
Sambuca Pistoiese PT 7 1626 1626
Cantagallo PO 11 3105 4731
Alto Reno Terme BO 13 6960 11691
Montale PT 13 10737 22428
Pistoia PT 13 90315 112743
Montemurlo PO 14 18456 131199
San Marcello Pistoiese PT 14 6416 137615
Castel di Casio BO 14 3448 141063
Lizzano in Belvedere BO 15 2212 143275
Vaiano PO 15 9895 153170
Vernio PO 15 6060 159230
Agliana PT 16 17525 176755
Piteglio PT 16 1683 178438
Camugnano BO 17 1885 180323
Gaggio Montano BO 18 4878 185201
Castiglione dei Pepoli BO 18 5648 190849
Cutigliano PT 18 1488 192337
Serravalle Pistoiese PT 19 11659 203996

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km NE of Pistoia (90315 inhabitants)
21 Km NW of Prato (191150 inhabitants)
36 Km NW of Scandicci (50609 inhabitants)
38 Km NW of Firenze (382808 inhabitants)
44 Km NE of Lucca (89046 inhabitants)
58 Km SW of Bologna (386663 inhabitants)
58 Km NE of Pisa (89158 inhabitants)
61 Km E of Viareggio (62467 inhabitants)
66 Km E of Massa (69479 inhabitants)
67 Km S of Modena (184973 inhabitants)
69 Km SW of Imola (69797 inhabitants)
70 Km E of Carrara (63133 inhabitants)
76 Km NE of Livorno (159219 inhabitants)
78 Km W of Faenza (58541 inhabitants)
78 Km SE of Reggio nell'Emilia (171345 inhabitants)
83 Km S of Carpi (70699 inhabitants)
86 Km NW of Siena (53903 inhabitants)
88 Km W of Forlì (117913 inhabitants)
92 Km E of La Spezia (93959 inhabitants)
97 Km NW of Arezzo (99543 inhabitants)
99 Km SE of Parma (192836 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 1.1 2020-04-19
23:07:16		 44.0437 10.9723 11 2020-07-18
21:08:33		 Bollettino Sismico Italiano INGV 78412951
Reviewed
Rev100 		ML 1.1 2020-04-19
23:07:16		 44.0443 10.9748 14 2020-04-19
23:17:05		 Sala Sismica INGV-Roma 78400491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-19 23:07:16 ± 0.04
Latitude 44.0437 ± 0.0027
Longitude 10.9723 ± 0.0025
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 78412951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 310
Semi-minor axis of confidence ellipse (meter) 0
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 173
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 46
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.12051
Epicentral distance of station farthest from the epicenter (degree) 0.60075
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 78412951
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-04-20 10:54:45

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 78400491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-19 23:17:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.GSCL.HHN. 2020-04-19T23:07:31.06 0.3 undecidable manual S 318 45.7209 91 0.17 71
GU.MAIM.HHZ. 2020-04-19T23:07:29.40 0.3 undecidable manual S 250 41.0256 91 -0.23 70
IV.VISG.HHZ. 2020-04-19T23:07:29.56 0.6 undecidable manual S 66 40.1265 91 0.16 48
GU.CARD.HHZ. 2020-04-19T23:07:29.01 0.6 undecidable manual S 267 39.1275 91 -0.13 47
GU.EQUI.HHZ. 2020-04-19T23:07:28.35 0.6 undecidable manual P 282 66.6777 90 0.43 43
IV.BDI.HHZ. 2020-04-19T23:07:26.69 0.3 undecidable manual S 274 30.1476 91 -0.04 73
IV.SEI.HHZ. 2020-04-19T23:07:26.77 0.3 undecidable manual S 88 30.8469 91 -0.13 72
GU.GSCL.HHN. 2020-04-19T23:07:25.01 0.3 undecidable manual P 318 45.7209 91 0.31 69
IV.RINC.HHZ. 2020-04-19T23:07:25.93 0.1 undecidable manual P 109 53.6019 90 0.03 95
IV.CRMI.HHZ. 2020-04-19T23:07:25.88 0.3 undecidable manual S 179 27.5502 91 -0.15 73
IV.PII.HHZ. 2020-04-19T23:07:25.39 0.3 undecidable manual P 225 50.5161 90 -0.04 71
GU.SARM.EHZ. 2020-04-19T23:07:24.93 0.1 undecidable manual P 289 48.1185 91 -0.13 93
GU.MAIM.HHZ. 2020-04-19T23:07:24.07 0.3 undecidable manual P 250 41.0256 91 0.11 71
IV.FNVD.HHZ. 2020-04-19T23:07:23.30 0.3 undecidable manual S 41 18.2706 94 -0.26 70
IV.VISG.HHZ. 2020-04-19T23:07:23.80 0.1 undecidable manual P 66 40.1265 91 -0.04 96
GU.CARD.HHZ. 2020-04-19T23:07:23.69 0.3 undecidable manual P 267 39.1275 91 0.01 73
IV.RONT.HHZ. 2020-04-19T23:07:23.67 0.3 undecidable manual P 98 37.1295 91 0.3 69
GU.POPM.HHZ. 2020-04-19T23:07:23.33 0.3 undecidable manual S 271 17.1717 95 0.06 76
IV.SEI.HHZ. 2020-04-19T23:07:22.22 0.3 undecidable manual P 88 30.8469 91 -0.17 71
IV.ZCCA.HHZ. 2020-04-19T23:07:22.95 0.6 undecidable manual P 1 34.0437 91 0.06 49
IV.MPPT.EHZ. 2020-04-19T23:07:22.33 0.3 undecidable manual S 135 13.3755 105 0.05 75
IV.BDI.HHZ. 2020-04-19T23:07:22.14 0.3 undecidable manual P 274 30.1476 91 -0.15 72
IV.CRMI.HHZ. 2020-04-19T23:07:21.74 0.3 undecidable manual P 179 27.5502 91 -0.15 73
GU.POPM.HHZ. 2020-04-19T23:07:20.28 0.3 undecidable manual P 271 17.1717 95 -0.01 75
IV.FNVD.HHZ. 2020-04-19T23:07:20.44 0.1 undecidable manual P 41 18.2706 94 -0.02 99
IV.MPPT.EHZ. 2020-04-19T23:07:19.82 0.1 undecidable manual P 135 13.3755 105 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MPPT.EHN. ML:1.3 0.000187 0.64 AML other m 2020-04-19T23:07:22.84
IV.MPPT.EHE. ML:1.3 0.00018099999999999998 0.56 AML other m 2020-04-19T23:07:22.84
GU.POPM.HHE. ML:1.2 0.0001225 0.14 AML other m 2020-04-19T23:07:23.60
GU.POPM.HHN. ML:1.2 0.000142 0.72 AML other m 2020-04-19T23:07:23.47
IV.FNVD.HHN. ML:1.3 0.000154 0.12 AML other m 2020-04-19T23:07:24.50
IV.FNVD.HHE. ML:1.2 0.00011979999999999998 0.32 AML other m 2020-04-19T23:07:24.69
IV.BDI.HHN. ML:0.9 0.00003765 1.28 AML other m 2020-04-19T23:07:27.69
IV.SEI.HHE. ML:0.8 0.000029699999999999997 0.78 AML other m 2020-04-19T23:07:27.65
IV.BDI.HHE. ML:0.7 0.0000246 1.52 AML other m 2020-04-19T23:07:27.94
IV.SEI.HHN. ML:1.1 0.000060450000000000006 0.78 AML other m 2020-04-19T23:07:28.26
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