Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (controlled explosion) with magnitude of ML 1.3 on date 06-04-2022 and time 14:13:22 (UTC) in region Costa Ligure orientale (La Spezia)

A magnitude ML 1.3 (controlled explosion) earthquake occured in region: Costa Ligure orientale (La Spezia), on

  • 06-04-2022 14:13:22 (UTC)
  • 06-04-2022 16:13:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0100, 9.8300 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: controlled explosion.

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
Portovenere SP 5 3630 3630
Lerici SP 10 10228 13858
La Spezia SP 11 93959 107817
Ameglia SP 12 4365 112182
Riomaggiore SP 13 1576 113758
Arcola SP 13 10607 124365
Vezzano Ligure SP 15 7356 131721
Sarzana SP 16 21976 153697
Riccò del Golfo di Spezia SP 17 3698 157395
Follo SP 17 6337 163732
Castelnuovo Magra SP 18 8415 172147
Vernazza SP 18 848 172995
Santo Stefano di Magra SP 18 9360 182355
Ortonovo SP 19 8277 190632

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km S of La Spezia (93959 inhabitants)
23 Km W of Carrara (63133 inhabitants)
25 Km W of Massa (69479 inhabitants)
37 Km W of Viareggio (62467 inhabitants)
56 Km NW of Pisa (89158 inhabitants)
57 Km W of Lucca (89046 inhabitants)
64 Km NW of Livorno (159219 inhabitants)
84 Km SE of Genova (586655 inhabitants)
88 Km W of Pistoia (90315 inhabitants)
97 Km SW of Parma (192836 inhabitants)
100 Km SW of Reggio nell'Emilia (171345 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 1.3 2022-04-06
14:13:22		 44.0098 9.8303 0 2022-07-08
12:33:42		 Bollettino Sismico Italiano INGV 102866181
Reviewed
Rev100 		ML 1.3 2022-04-06
14:13:23		 44.0492 9.8652 10 2022-04-06
14:44:58		 Sala Sismica INGV-Roma 102841731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-04-06 14:13:22 ± 0.28
Latitude 44.0098 ± 0.0198
Longitude 9.8303 ± 0.0200
Depth (km) 0 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type controlled explosion
Origin ID 102866181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2510
Semi-minor axis of confidence ellipse (meter) 1100
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 30
Circular confidence region, given by single value of horizontal uncertainty (meter) 2510.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 187
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.90742
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 102866181
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-04-07 09:54:48

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 102841731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-04-06 14:44:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VAGA.HNZ. 2022-04-06T14:15:20.76 3.0 undecidable manual Sn 1.53 0
IV.CMPR.HHZ. 2022-04-06T14:14:43.18 3.0 positive manual Pn -3.79 0
IV.ARRO.EHZ. 2022-04-06T14:14:43.12 3.0 undecidable manual Sg 2.55 0
IV.FOSV.EHZ. 2022-04-06T14:14:31.92 3.0 undecidable manual Sn -0.16 0
GU.RSP.HNZ. 2022-04-06T14:14:30.82 3.0 undecidable manual Sn 1.44 0
IV.MMO1.EHZ. 2022-04-06T14:14:18.48 3.0 undecidable manual Pg 9.03 0
IV.ARVD.HHZ. 2022-04-06T14:14:04.35 3.0 negative manual Pn 1.45 0
IV.MPPT.EHZ. 2022-04-06T14:13:40.89 0.3 undecidable manual P 93 100.7214 50 0.37 73
GU.RNCA.HHZ. 2022-04-06T14:13:39.01 0.3 undecidable manual P 307 86.6466 50 0.67 68
GU.GORR.HHZ. 2022-04-06T14:13:36.72 0.3 undecidable manual P 327 78.8655 50 -0.43 75
GU.POPM.HHZ. 2022-04-06T14:13:36.18 0.6 undecidable manual P 87 73.9704 50 -0.22 53
IV.BDI.HHZ. 2022-04-06T14:13:34.24 0.3 undecidable manual P 84 61.2942 50 -0.21 81
IV.ERBM.EHE. 2022-04-06T14:13:34.04 0.3 undecidable manual P 45 64.8906 50 -0.95 63
IV.PII.HHZ. 2022-04-06T14:13:34.57 0.3 undecidable manual P 120 64.0914 50 -0.3 79
GU.GRAM.HHZ. 2022-04-06T14:13:33.32 0.3 undecidable manual P 19 56.499 90 -0.17 82
GU.MAIM.HHZ. 2022-04-06T14:13:33.05 0.3 undecidable manual P 101 53.9016 90 0.08 84
GU.CARD.HHZ. 2022-04-06T14:13:32.68 0.3 undecidable manual P 88 52.0035 90 0.09 84
IV.MSSA.HHZ. 2022-04-06T14:13:30.64 0.3 undecidable manual P 324 42.1245 90 0.03 87
GU.EQUI.HHZ. 2022-04-06T14:13:29.06 0.1 undecidable manual P 56 31.0467 90 0.68 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.EQUI.HHE. ML:0.8 0.000031100000000000004 0.76 AML other m 2022-04-06T14:13:29.69
GU.EQUI.HHN. ML:0.8 0.000032550000000000005 1.02 AML other m 2022-04-06T14:13:30.87
IV.MSSA.HHE. ML:1.5 0.00010792846 0.8416 AML other m 2022-04-06T14:13:33.76
GU.CARD.HHN. ML:1.6 0.00009425 1.24 AML other m 2022-04-06T14:13:36.16
GU.MAIM.HHE. ML:0.9 0.000020778845 0.1408 AML other m 2022-04-06T14:13:36.23
GU.GRAM.HHE. ML:1.4 0.00005463278 1.2608 AML other m 2022-04-06T14:13:37.71
GU.CARD.HHE. ML:1.4 0.0000636 0.94 AML other m 2022-04-06T14:13:37.09
GU.MAIM.HHN. ML:1.0 0.000022500785000000002 0.5024 AML other m 2022-04-06T14:13:37.33
GU.GRAM.HHN. ML:1.4 0.00005809705499999999 0.7552 AML other m 2022-04-06T14:13:37.60
IV.MSSA.HHN. ML:1.6 0.00014635025 0.096 AML other m 2022-04-06T14:13:38.23
IV.BDI.HHN. ML:1.0 0.000020549999999999998 0.92 AML other m 2022-04-06T14:13:42.13
IV.BDI.HHE. ML:1.2 0.00002755 0.76 AML other m 2022-04-06T14:13:44.57
GU.POPM.HHN. ML:1.4 0.00003435 0.68 AML other m 2022-04-06T14:13:49.34
GU.POPM.HHE. ML:1.4 0.000039349999999999994 1 AML other m 2022-04-06T14:13:49.17
GU.GORR.HHE. ML:1.2 0.000019791650000000002 0.8032 AML other m 2022-04-06T14:13:49.74
GU.GORR.HHN. ML:1.2 0.000023298280000000002 0.3456 AML other m 2022-04-06T14:13:50.82
GU.RNCA.HHE. ML:1.4 0.0000369 0.36 AML other m 2022-04-06T14:13:52.75
GU.RNCA.HHN. ML:1.4 0.00003265 0.42 AML other m 2022-04-06T14:13:53.77
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