Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 25-03-2021 and time 01:42:45 (Italy) in region 9 km NW Sillano Giuncugnano (LU)

A magnitude ML 0.9 earthquake occured in region: 9 km NW Sillano Giuncugnano (LU), on

  • 25-03-2021 00:42:45 (UTC)
  • 25-03-2021 01:42:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2970, 10.2530 at 15 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
Sillano Giuncugnano LU 9 1085 1085
Comano MS 9 714 1799
Ventasso RE 10 4295 6094
Casola in Lunigiana MS 12 988 7082
Fivizzano MS 12 7925 15007
Piazza al Serchio LU 13 2367 17374
Minucciano LU 14 2102 19476
San Romano in Garfagnana LU 16 1410 20886
Palanzano PR 16 1142 22028
Monchio delle Corti PR 17 933 22961
Camporgiano LU 17 2176 25137
Licciana Nardi MS 17 4949 30086
Villa Minozzo RE 19 3750 33836
Villa Collemandina LU 19 1334 35170
Castelnovo ne' Monti RE 20 10465 45635

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NE of Carrara (63133 inhabitants)
30 Km NE of Massa (69479 inhabitants)
40 Km NE of La Spezia (93959 inhabitants)
48 Km N of Viareggio (62467 inhabitants)
54 Km SW of Reggio nell'Emilia (171345 inhabitants)
54 Km NW of Lucca (89046 inhabitants)
57 Km S of Parma (192836 inhabitants)
66 Km N of Pisa (89158 inhabitants)
66 Km SW of Modena (184973 inhabitants)
67 Km NW of Pistoia (90315 inhabitants)
74 Km SW of Carpi (70699 inhabitants)
82 Km NW of Prato (191150 inhabitants)
83 Km N of Livorno (159219 inhabitants)
89 Km W of Bologna (386663 inhabitants)
95 Km S of Cremona (71901 inhabitants)
95 Km SE of Piacenza (102191 inhabitants)
95 Km NW of Scandicci (50609 inhabitants)
99 Km NW of Firenze (382808 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 0.9 2021-03-25
00:42:45		 44.2967 10.2527 15 2021-07-12
16:55:03		 Bollettino Sismico Italiano INGV 88482341
Reviewed
Rev100 		ML 0.9 2021-03-25
00:42:45		 44.2962 10.2553 15 2021-03-25
00:52:57		 Sala Sismica INGV-Roma 88442261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-25 00:42:45 ± 0.09
Latitude 44.2967 ± 0.0036
Longitude 10.2527 ± 0.0050
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88482341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 429
Semi-minor axis of confidence ellipse (meter) 116
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 296
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.10702
Epicentral distance of station farthest from the epicenter (degree) 0.60704
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 88482341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-14 09:36:37

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 88442261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-25 00:52:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PLMA.HHZ. 2021-03-25T00:42:59.14 0.3 undecidable manual S 229 41.9247 97 -0.15 70
IV.BDI.HHZ. 2021-03-25T00:42:57.97 0.3 undecidable manual S 133 37.629 98 -0.18 69
GU.CARD.HHZ. 2021-03-25T00:42:57.04 0.3 undecidable manual S 149 35.1426 99 -0.45 66
IV.PII.HHZ. 2021-03-25T00:42:57.84 0.3 undecidable manual P 161 67.377 94 0.44 63
GU.GSCL.HHZ. 2021-03-25T00:42:55.40 0.1 undecidable manual S 77 27.2505 103 -0.03 98
GU.GRAM.HHZ. 2021-03-25T00:42:55.02 0.3 undecidable manual S 325 26.1516 104 -0.11 73
MN.VLC.HHZ. 2021-03-25T00:42:53.35 0.6 undecidable manual S 145 18.5703 114 0.13 49
IV.PLMA.HHZ. 2021-03-25T00:42:53.51 0.1 undecidable manual P 229 41.9247 97 0.02 96
GU.EQUI.HHZ. 2021-03-25T00:42:52.55 0.1 undecidable manual S 209 16.5723 119 -0.19 98
IV.BDI.HHZ. 2021-03-25T00:42:52.94 0.1 undecidable manual P 133 37.629 98 0.1 95
GU.SARM.EHZ. 2021-03-25T00:42:52.94 0.3 undecidable manual S 137 17.1717 117 0.05 74
GU.CARD.HHZ. 2021-03-25T00:42:52.99 0.3 undecidable manual P 149 35.1426 99 0.53 65
GU.GRAM.HHZ. 2021-03-25T00:42:51.00 0.1 negative manual P 325 26.1516 104 -0.1 97
GU.GSCL.HHZ. 2021-03-25T00:42:51.29 0.1 undecidable manual P 77 27.2505 103 0.02 99
GU.FIVI.HNZ. 2021-03-25T00:42:51.90 0.3 undecidable manual S 238 11.877 131 0.19 72
GU.EQUI.HHZ. 2021-03-25T00:42:49.49 0.1 positive manual P 209 16.5723 119 -0.22 96
GU.SARM.EHZ. 2021-03-25T00:42:49.82 0.1 positive manual P 137 17.1717 117 0.02 100
GU.FIVI.HNZ. 2021-03-25T00:42:49.21 0.1 undecidable manual P 238 11.877 131 0.09 99
MN.VLC.HHZ. 2021-03-25T00:42:49.95 0.1 undecidable manual P 145 18.5703 114 -0.04 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.VLC.HNE. ML:0.6 0.000029499359999999998 0.14 AML other m 2021-03-25T00:42:53.60
MN.VLC.HHE. ML:0.6 0.0000315465315 0.2 AML other m 2021-03-25T00:42:53.74
MN.VLC.HHN. ML:0.5 0.000021462970000000002 0.1 AML other m 2021-03-25T00:42:53.92
MN.VLC.HNN. ML:0.6 0.000022600684999999998 0.1 AML other m 2021-03-25T00:42:53.93
GU.GRAM.HHN. ML:1.1 0.000060900095 0.22 AML other m 2021-03-25T00:42:55.41
GU.GRAM.HHE. ML:1.4 0.0001259545 0.22 AML other m 2021-03-25T00:42:55.62
GU.CARD.HHN. ML:1.1 0.000047318415 1.9 AML other m 2021-03-25T00:42:58.96
GU.CARD.HHE. ML:1.0 0.0000406 0.14 AML other m 2021-03-25T00:42:59.14
IV.PLMA.HHN. ML:0.8 0.000017564379999999996 0.16 AML other m 2021-03-25T00:42:59.54
IV.PLMA.HHE. ML:0.5 0.0000095364285 0.06 AML other m 2021-03-25T00:42:59.94
IV.BDI.HHE. ML:0.6 0.000014023909499999999 0.24 AML other m 2021-03-25T00:42:59.83
IV.BDI.HHN. ML:0.6 0.000014078199999999998 1.86 AML other m 2021-03-25T00:43:00.94
IV.MSSA.HHN. ML:1.2 0.000031978549999999996 0.12 AML other m 2021-03-25T00:43:04.22
IV.MSSA.HHE. ML:1.5 0.000064479405 0.12 AML other m 2021-03-25T00:43:05.10
IV.PII.HHE. ML:1.1 0.00002100829 0.18 AML other m 2021-03-25T00:43:06.90
IV.PII.HHN. ML:1.2 0.000023003860000000002 0.06 AML other m 2021-03-25T00:43:08.18
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