Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 18-04-2023 and time 15:09:29 (Italy) in region 3 km NW Lanzada (SO)

A magnitude ML 1.3 earthquake occured in region: 3 km NW Lanzada (SO), on

  • 18-04-2023 13:09:29 (UTC)
  • 18-04-2023 15:09:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.2970, 9.8630 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
Lanzada SO 3 1341 1341
Caspoggio SO 4 1411 2752
Chiesa in Valmalenco SO 4 2514 5266
Torre di Santa Maria SO 7 773 6039
Spriana SO 8 97 6136
Montagna in Valtellina SO 13 3032 9168
Sondrio SO 14 21778 30946
Poggiridenti SO 14 1924 32870
Castione Andevenno SO 15 1575 34445
Tresivio SO 15 2030 36475
Postalesio SO 15 657 37132
Ponte in Valtellina SO 16 2362 39494
Faedo Valtellino SO 16 566 40060
Caiolo SO 16 1085 41145
Piateda SO 16 2219 43364
Albosaggia SO 17 3094 46458
Berbenno di Valtellina SO 17 4210 50668
Chiuro SO 17 2534 53202
Cedrasco SO 18 460 53662
Fusine SO 18 579 54241
Colorina SO 19 1410 55651
Buglio in Monte SO 19 2016 57667
Val Masino SO 20 908 58575

Municipalities with at least 50000 inhabitants

An earthquake occurred to
69 Km N of Bergamo (119381 inhabitants)
81 Km NE of Como (84495 inhabitants)
89 Km NW of Brescia (196480 inhabitants)
91 Km NE of Monza (122671 inhabitants)
96 Km NE of Cinisello Balsamo (75078 inhabitants)
96 Km NE of Varese (80799 inhabitants)
98 Km NE of Sesto San Giovanni (81608 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 2023-04-18
13:09:29		 46.2967 9.8627 10 2024-03-01
17:18:20		 Bollettino Sismico Italiano INGV 125092971
Reviewed
Rev100 		ML 1.3 2023-04-18
13:09:29		 46.2898 9.8548 10 2023-04-18
13:21:24		 Sala Sismica INGV-Roma 116489541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-18 13:09:29 ± 0.19
Latitude 46.2967 ± 0.0081
Longitude 9.8627 ± 0.0143
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 125092971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1148
Semi-minor axis of confidence ellipse (meter) 461
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 116
Circular confidence region, given by single value of horizontal uncertainty (meter) 1150.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.00814
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 125092971
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-02-07 10:58:44

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 116489541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-18 13:21:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2023-04-18T13:11:21.55 3.0 undecidable manual Sn -6.72 0
IV.MOCO.HHZ. 2023-04-18T13:11:20.10 3.0 negative manual Pg 15.41 0
IV.PZUN.HHZ. 2023-04-18T13:11:17.32 3.0 positive manual Pn 0.6 0
SL.LJU.BHZ. 2023-04-18T13:11:16.87 3.0 undecidable manual Sg 11.87 0
IV.ARVD.HHZ. 2023-04-18T13:11:12.54 3.0 undecidable manual Sn 0.15 0
IV.GIUL.HHZ. 2023-04-18T13:11:03.63 3.0 undecidable manual Pg 11.48 0
IV.VAGA.HNZ. 2023-04-18T13:11:03.00 3.0 undecidable manual Pn 4.19 0
IV.CSNT.HHZ. 2023-04-18T13:10:54.51 3.0 undecidable manual Sn -4.14 0
OX.DRE.HHZ. 2023-04-18T13:10:50.65 3.0 undecidable manual Sn 0.9 0
IV.VCEL.EHZ. 2023-04-18T13:10:48.20 3.0 undecidable manual Pn 2.84 0
IV.IMOL.HNZ. 2023-04-18T13:10:45.06 3.0 undecidable manual Sg 2.15 0
RF.GEPF.HHZ. 2023-04-18T13:10:45.12 3.0 undecidable manual Sg 4.11 0
IV.QLNO.HHZ. 2023-04-18T13:10:38.44 3.0 undecidable manual Sn -0.57 0
IV.GUMA.HHZ. 2023-04-18T13:10:29.97 3.0 positive manual Pn -4.96 0
IV.ARVD.HHZ. 2023-04-18T13:10:22.97 3.0 undecidable manual Pn -4.81 0
OX.DRE.HHZ. 2023-04-18T13:10:16.59 3.0 negative manual Pn 1.53 0
NI.VINO.HHZ. 2023-04-18T13:10:12.58 3.0 undecidable manual Pn 1.11 0
ST.DOSS.HHZ. 2023-04-18T13:09:49.33 0.6 undecidable manual P 114 111.8991 50 1.23 28
IV.MABI.HHZ. 2023-04-18T13:09:46.64 0.6 undecidable manual S 118 56.7987 50 -0.46 43
CH.FUSIO.HHZ. 2023-04-18T13:09:45.39 0.3 undecidable manual P 281 93.4398 50 0.14 64
CH.DAVOX.HHZ. 2023-04-18T13:09:45.98 0.6 undecidable manual S 1 53.7018 50 -0.3 45
CH.FUORN.HHE. 2023-04-18T13:09:44.32 0.6 undecidable manual S 40 47.2194 50 -0.23 46
IV.MAGA.HHZ. 2023-04-18T13:09:44.32 0.6 undecidable manual P 134 82.6506 50 0.75 37
IV.BRMO.HHZ. 2023-04-18T13:09:43.02 0.6 undecidable manual S 63 43.7229 50 -0.62 42
CH.MUGIO.HHN. 2023-04-18T13:09:42.51 0.6 undecidable manual P 237 75.5688 50 0.02 46
ST.RONC.EHZ. 2023-04-18T13:09:41.64 0.3 undecidable manual P 121 68.1762 50 0.29 66
SI.MOSI.HHZ. 2023-04-18T13:09:41.11 0.3 undecidable manual P 56 63.3921 50 0.5 63
IV.MDI.HHE. 2023-04-18T13:09:40.56 0.6 undecidable manual P 191 59.496 50 0.54 42
CH.DAVOX.HHZ. 2023-04-18T13:09:39.34 0.1 undecidable manual P 1 53.7018 50 0.22 91
IV.MABI.HHZ. 2023-04-18T13:09:39.78 0.3 undecidable manual P 118 56.7987 50 0.19 68
CH.FUORN.HHE. 2023-04-18T13:09:38.27 0.1 undecidable manual P 40 47.2194 50 0.16 94
4P.IT05A.HHZ. 2023-04-18T13:09:38.74 0.3 undecidable manual S 196 28.749 50 -0.89 57
IV.BRMO.HHZ. 2023-04-18T13:09:37.54 0.3 undecidable manual P 63 43.7229 50 -0.05 72
CH.BERNI.HHZ. 2023-04-18T13:09:36.03 0.3 undecidable manual S 43 17.871 120 -0.45 69
4P.IT05A.HHZ. 2023-04-18T13:09:34.95 0.1 negative manual P 196 28.749 50 -0.32 93
CH.BERNI.HHZ. 2023-04-18T13:09:33.37 0.1 undecidable manual P 43 17.871 120 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
CH.BERNI.HHE. ML:1.1 0.000094808225 1.68 AML other m 2023-04-18T13:09:35.93
CH.BERNI.HHN. ML:1.2 0.0001435 1 AML other m 2023-04-18T13:09:36.04
4P.IT05A.HHE. ML:1.1 0.00006525 0.72 AML other m 2023-04-18T13:09:42.24
4P.IT05A.HHN. ML:1.1 0.000058250000000000006 0.92 AML other m 2023-04-18T13:09:43.09
IV.BRMO.HHE. ML:0.9 0.00002283696 0.3616 AML other m 2023-04-18T13:09:43.63
IV.BRMO.HHN. ML:1.0 0.00003195 0.34 AML other m 2023-04-18T13:09:43.85
IV.MABI.HHN. ML:1.1 0.0000308 0.2 AML other m 2023-04-18T13:09:46.86
IV.MABI.HHE. ML:1.0 0.0000213 1.5 AML other m 2023-04-18T13:09:46.90
CH.DAVOX.HHE. ML:1.6 0.0000889 0.94 AML other m 2023-04-18T13:09:51.23
ST.RONC.EHE. ML:1.5 0.00006050000000000001 0.14 AML other m 2023-04-18T13:09:53.54
CH.DAVOX.HHN. ML:1.7 0.00010829999999999999 0.96 AML other m 2023-04-18T13:09:54.51
ST.RONC.EHN. ML:1.8 0.00010735000000000001 0.2 AML other m 2023-04-18T13:09:54.91
IV.MAGA.HHN. ML:1.6 0.000049000000000000005 0.24 AML other m 2023-04-18T13:09:56.73
IV.MAGA.HHE. ML:1.7 0.0000585 0.54 AML other m 2023-04-18T13:10:03.65
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download