Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 20-04-2020 and time 00:01:47 (Italy) in region 8 km SW Sambuca Pistoiese (PT)

A magnitude ML 1.1 earthquake occured in region: 8 km SW Sambuca Pistoiese (PT), on

  • 19-04-2020 22:01:47 (UTC)
  • 20-04-2020 00:01:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0410, 10.9680 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
Sambuca Pistoiese PT 8 1626 1626
Cantagallo PO 11 3105 4731
Montale PT 13 10737 15468
Pistoia PT 13 90315 105783
Alto Reno Terme BO 13 6960 112743
Montemurlo PO 14 18456 131199
San Marcello Pistoiese PT 14 6416 137615
Castel di Casio BO 15 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
Cutigliano PT 18 1488 186689
Serravalle Pistoiese PT 19 11659 198348
Castiglione dei Pepoli BO 19 5648 203996
Marliana PT 20 3210 207206

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)
43 Km NE of Lucca (89046 inhabitants)
58 Km NE of Pisa (89158 inhabitants)
59 Km SW of Bologna (386663 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 SE of Reggio nell'Emilia (171345 inhabitants)
78 Km W of Faenza (58541 inhabitants)
83 Km S of Carpi (70699 inhabitants)
86 Km NW of Siena (53903 inhabitants)
88 Km W of Forlì (117913 inhabitants)
91 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
22:01:47		 44.0413 10.9685 10 2020-07-18
21:08:33		 Bollettino Sismico Italiano INGV 78439251
Reviewed
Rev100 		ML 1.1 2020-04-19
22:01:47		 44.0435 10.9662 10 2020-04-19
22:10:15		 Sala Sismica INGV-Roma 78400041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-19 22:01:47 ± 0.05
Latitude 44.0413 ± 0.0036
Longitude 10.9685 ± 0.0038
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 78439251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 407
Semi-minor axis of confidence ellipse (meter) 40
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 7
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.12141
Epicentral distance of station farthest from the epicenter (degree) 0.64661
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 78439251
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-04-21 07:32:53

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 78400041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-19 22:10:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.EQUI.HHZ. 2020-04-19T22:02:07.73 0.6 undecidable manual S 282 66.378 50 0.12 48
IV.RINC.HHZ. 2020-04-19T22:02:04.56 0.6 undecidable manual S 108 53.8017 50 0.32 47
IV.GSCL.HHZ. 2020-04-19T22:02:02.64 0.6 undecidable manual S 319 45.7209 50 0.55 45
IV.VISG.HHZ. 2020-04-19T22:02:00.74 0.6 undecidable manual S 66 40.5261 50 0.04 51
IV.RONT.HHZ. 2020-04-19T22:02:00.36 0.6 undecidable manual S 98 37.4292 50 0.49 46
IV.SFI.HNZ. 2020-04-19T22:02:00.13 0.1 undecidable manual P 102 71.7726 50 0.31 90
IV.CSNT.HHZ. 2020-04-19T22:01:59.32 0.1 undecidable manual P 158 68.0763 50 0.06 96
GU.EQUI.HHZ. 2020-04-19T22:01:58.95 1.0 undecidable manual P 282 66.378 50 -0.05 24
IV.LMD.HHZ. 2020-04-19T22:01:58.03 0.6 undecidable manual P 86 58.9965 50 0.17 48
IV.SEI.HHZ. 2020-04-19T22:01:58.00 0.3 undecidable manual S 87 31.1466 50 -0.19 75
IV.CRMI.HHZ. 2020-04-19T22:01:57.01 0.3 undecidable manual S 178 27.2505 50 -0.16 76
IV.BDI.HHZ. 2020-04-19T22:01:57.70 0.3 undecidable manual S 275 29.8479 50 -0.14 76
IV.RINC.HHZ. 2020-04-19T22:01:57.05 0.1 undecidable manual P 108 53.8017 50 -0.01 100
GU.SARM.EHZ. 2020-04-19T22:01:56.19 0.1 undecidable manual P 289 47.9187 50 0.04 100
IV.GSCL.HHZ. 2020-04-19T22:01:56.04 0.1 undecidable manual P 319 45.7209 50 0.23 97
IV.RONT.HHZ. 2020-04-19T22:01:54.54 0.6 undecidable manual P 98 37.4292 50 0.01 51
GU.CARD.HHZ. 2020-04-19T22:01:54.58 0.1 undecidable manual P 268 38.8278 50 -0.17 99
GU.MAIM.HHZ. 2020-04-19T22:01:54.79 0.1 undecidable manual P 250 40.626 50 -0.23 97
GU.POPM.HHZ. 2020-04-19T22:01:54.25 0.3 undecidable manual S 271 16.872 121 0.17 77
IV.VISG.HHZ. 2020-04-19T22:01:54.77 0.1 undecidable manual P 66 40.5261 50 -0.24 97
IV.FNVD.HHZ. 2020-04-19T22:01:54.29 0.3 undecidable manual S 41 18.6702 119 -0.33 74
IV.ZCCA.HHZ. 2020-04-19T22:01:54.52 1.0 undecidable manual P 1 34.3434 50 0.47 23
IV.MPPT.EHZ. 2020-04-19T22:01:53.24 0.3 undecidable manual S 134 13.4754 127 0.14 78
IV.BDI.HHZ. 2020-04-19T22:01:53.14 0.3 undecidable manual P 275 29.8479 50 -0.22 75
IV.SEI.HHZ. 2020-04-19T22:01:53.28 0.1 undecidable manual P 87 31.1466 50 -0.28 98
IV.CRMI.HHZ. 2020-04-19T22:01:52.79 0.3 undecidable manual P 178 27.2505 50 -0.18 76
GU.POPM.HHZ. 2020-04-19T22:01:51.27 0.3 undecidable manual P 271 16.872 121 0.09 79
IV.FNVD.HHZ. 2020-04-19T22:01:51.36 0.3 undecidable manual P 41 18.6702 119 -0.14 77
IV.MPPT.EHZ. 2020-04-19T22:01:50.79 0.3 undecidable manual P 134 13.4754 127 0.17 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.POPM.HHN. ML:1.2 0.00014749999999999998 1.22 AML other m 2020-04-19T22:01:55.92
IV.BDI.HNN. ML:0.9 0.00003805140499999999 1.1936 AML other m 2020-04-19T22:01:57.26
IV.BDI.HHN. ML:0.9 0.0000382 1.28 AML other m 2020-04-19T22:01:58.68
IV.BDI.HHE. ML:0.8 0.00002785 1.36 AML other m 2020-04-19T22:01:58.05
IV.BDI.HNE. ML:1.3 0.00009394984000000001 1.36 AML other m 2020-04-19T22:01:58.26
IV.RONT.HHN. ML:1.1 0.000049388810000000005 1.6416 AML other m 2020-04-19T22:02:01.12
IV.RONT.HHE. ML:1.3 0.00007694999999999999 1.38 AML other m 2020-04-19T22:02:02.15
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