Earthquake with magnitude of ML 1.1 on date 27-09-2021 and time 06:51:51 (Italy) in region 3 km W Piteglio (PT)

A magnitude ML 1.1 earthquake occured in region: 3 km W Piteglio (PT), on

  • 27-09-2021 04:51:51 (UTC)
  • 27-09-2021 06:51:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0300, 10.7340 at 50 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Piteglio PT 3 1683 1683
San Marcello Pistoiese PT 6 6416 8099
Cutigliano PT 8 1488 9587
Marliana PT 11 3210 12797
Bagni di Lucca LU 12 6161 18958
Massa e Cozzile PT 13 7983 26941
Villa Basilica LU 13 1633 28574
Abetone PT 14 621 29195
Pescia PT 14 19644 48839
Serravalle Pistoiese PT 16 11659 60498
Borgo a Mozzano LU 16 6994 67492
Montecatini-Terme PT 16 20409 87901
Uzzano PT 17 5770 93671
Buggiano PT 17 8825 102496
Coreglia Antelminelli LU 17 5215 107711
Pieve a Nievole PT 17 9266 116977
Fiumalbo MO 18 1280 118257
Pistoia PT 18 90315 208572
Monsummano Terme PT 19 21338 229910
Lizzano in Belvedere BO 20 2212 232122

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km NW of Pistoia (90315 inhabitants)
28 Km NE of Lucca (89046 inhabitants)
34 Km W of Prato (191150 inhabitants)
43 Km E of Viareggio (62467 inhabitants)
44 Km NE of Pisa (89158 inhabitants)
47 Km NW of Scandicci (50609 inhabitants)
47 Km E of Massa (69479 inhabitants)
51 Km NW of Firenze (382808 inhabitants)
51 Km E of Carrara (63133 inhabitants)
63 Km NE of Livorno (159219 inhabitants)
70 Km S of Modena (184973 inhabitants)
71 Km SW of Bologna (386663 inhabitants)
73 Km E of La Spezia (93959 inhabitants)
75 Km S of Reggio nell'Emilia (171345 inhabitants)
85 Km S of Carpi (70699 inhabitants)
86 Km W of Imola (69797 inhabitants)
92 Km SE of Parma (192836 inhabitants)
93 Km NW of Siena (53903 inhabitants)
96 Km W of Faenza (58541 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 2021-09-27
04:51:51
44.03 10.7338 50 2022-03-30
13:04:38
Bollettino Sismico Italiano INGV 101108811
Reviewed
Rev100
ML 1.1 2021-09-27
04:51:51
44.0917 10.7653 51 2021-09-27
05:04:28
Sala Sismica INGV-Roma 95926441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-27 04:51:51 ± 0.24
Latitude 44.0300 ± 0.0153
Longitude 10.7338 ± 0.0200
Depth (km) 50 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 101108811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1763
Semi-minor axis of confidence ellipse (meter) 1378
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 218
Circular confidence region, given by single value of horizontal uncertainty (meter) 1760.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.36512
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 95926441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-27 05:04:28

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 101108811
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-18 11:53:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTGR.HHZ. 2021-09-27T04:53:15.13 3.0 undecidable manual Pn -7.18 0
GU.BURY.HHZ. 2021-09-27T04:53:10.39 3.0 undecidable manual Sg 14.98 0
IX.SSB3.HHZ.02 2021-09-27T04:53:10.92 3.0 positive manual Pg 18.48 0
IV.PZUN.HHZ. 2021-09-27T04:53:10.64 3.0 negative manual Pg 9.85 0
IV.MCRV.HHZ. 2021-09-27T04:53:05.77 3.0 undecidable manual Pg 10.49 0
IV.MCIV.CHZ. 2021-09-27T04:52:42.46 3.0 undecidable manual Sn 1.18 0
CR.ZAG.BHZ. 2021-09-27T04:52:36.40 3.0 positive manual Pn 0.21 0
IV.OFFI.HHZ. 2021-09-27T04:52:22.79 3.0 undecidable manual Pn -0.43 0
GU.MAIM.HHZ. 2021-09-27T04:52:07.04 0.6 undecidable manual S 236 23.2545 149 0.51 60
IV.CRMI.HHZ. 2021-09-27T04:52:07.92 0.6 undecidable manual S 143 32.5452 139 0.21 63
GU.CARD.HHZ. 2021-09-27T04:52:06.15 0.6 undecidable manual S 269 20.0688 153 -0.05 67
IV.EUCT.HNZ. 2021-09-27T04:52:06.25 3.0 negative manual Pn 0.15 0
GU.POPM.HHZ. 2021-09-27T04:52:05.22 0.6 undecidable manual S 48 2.4975 177 0.03 69
IV.BDI.HHZ. 2021-09-27T04:52:05.46 0.6 undecidable manual S 288 11.5773 164 -0.06 68
IV.ZEN8.EHZ. 2021-09-27T04:52:04.54 3.0 undecidable manual Pg 4.78 0
GU.SARM.EHZ. 2021-09-27T04:52:01.07 0.3 undecidable manual P 303 31.5462 140 0.29 94
IV.ZCCA.HNZ. 2021-09-27T04:52:01.80 0.3 undecidable manual P 28 40.5261 131 0.24 93
IV.TREG.EHZ. 2021-09-27T04:52:01.73 3.0 negative manual P 3.32 0
GU.GSCL.HHZ. 2021-09-27T04:52:01.32 0.3 undecidable manual P 342 37.4292 134 0.04 98
IV.BRSN.HNZ. 2021-09-27T04:52:00.78 3.0 negative manual P 0.14 0
GU.MAIM.HHZ. 2021-09-27T04:52:00.23 0.3 undecidable manual P 236 23.2545 149 0.05 100
IV.CRMI.HHZ. 2021-09-27T04:52:00.77 0.3 undecidable manual P 143 32.5452 139 -0.09 98
IV.BDI.HHZ. 2021-09-27T04:51:59.24 0.3 undecidable manual P 288 11.5773 164 -0.36 95
GU.CARD.HHZ. 2021-09-27T04:51:59.76 0.3 undecidable manual P 269 20.0688 153 -0.23 97
GU.POPM.HHZ. 2021-09-27T04:51:59.10 0.3 undecidable manual P 48 2.4975 177 -0.31 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.POPM.HHE. ML:1.0 0.00002726746 0.2208 AML other m 2021-09-27T04:52:05.52
IV.BDI.HHN. ML:1.0 0.000026957889999999997 0.24 AML other m 2021-09-27T04:52:05.63
IV.BDI.HHE. ML:0.9 0.00002199678 0.1408 AML other m 2021-09-27T04:52:06.14
GU.POPM.HHN. ML:1.1 0.00003715 1.04 AML other m 2021-09-27T04:52:06.64
GU.CARD.HHN. ML:1.2 0.000038796185 0.1792 AML other m 2021-09-27T04:52:06.51
GU.CARD.HHE. ML:1.3 0.000045140700000000006 0.1408 AML other m 2021-09-27T04:52:06.61
GU.MAIM.HHN. ML:1.0 0.000026295804999999997 0.1216 AML other m 2021-09-27T04:52:07.21
GU.MAIM.HHE. ML:0.8 0.00001543184 0.2016 AML other m 2021-09-27T04:52:07.37
IV.BDI.HNE. ML:1.6 0.00010549737000000001 1.0304 AML other m 2021-09-27T04:52:09.99
IV.CRMI.HNE. ML:1.8 0.0001405878 0.832 AML other m 2021-09-27T04:52:21.09
IV.BDI.HNN. ML:1.7 0.0001345441 0.8192 AML other m 2021-09-27T04:52:25.52
IV.CRMI.HNN. ML:2.4 0.00058254275 0.3584 AML other m 2021-09-27T04:52:25.58
IV.CRMI.HHN. ML:0.7 0.0000095646735 0.7392 AML other m 2021-09-27T04:52:28.44
IV.CRMI.HHE. ML:0.7 0.000012215245999999999 0.9216 AML other m 2021-09-27T04:52:30.71
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