Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 28-09-2024 and time 12:05:55 (Italy) in region 1 km S Bergamasco (AL)

A magnitude ML 1.8 earthquake occured in region: 1 km S Bergamasco (AL), on

  • 28-09-2024 10:05:55 (UTC)
  • 28-09-2024 12:05:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.8210, 8.4560 at 21 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Bergamasco AL 1 744 744
Carentino AL 2 340 1084
Bruno AT 4 321 1405
Castelnuovo Belbo AT 4 895 2300
Oviglio AL 5 1265 3565
Mombaruzzo AT 6 1117 4682
Incisa Scapaccino AT 6 2288 6970
Frascaro AL 6 440 7410
Masio AL 7 1420 8830
Maranzana AT 7 277 9107
Borgoratto Alessandrino AL 7 584 9691
Gamalero AL 7 844 10535
Cortiglione AT 8 571 11106
Quaranti AT 8 183 11289
Fontanile AT 8 567 11856
Castelletto Molina AT 8 180 12036
Felizzano AL 9 2344 14380
Nizza Monferrato AT 9 10429 24809
Cerro Tanaro AT 10 626 25435
Vaglio Serra AT 10 275 25710
Quattordio AL 10 1637 27347
Rocchetta Tanaro AT 10 1450 28797
Cassine AL 10 2961 31758
Belveglio AT 10 350 32108
Ricaldone AL 10 684 32792
Castellazzo Bormida AL 10 4570 37362
Sezzadio AL 10 1246 38608
Castelspina AL 10 416 39024
Alice Bel Colle AL 11 766 39790
Vinchio AT 11 601 40391
Castelnuovo Bormida AL 11 694 41085
Castel Rocchero AT 12 395 41480
Solero AL 12 1645 43125
Castel Boglione AT 13 609 43734
Mombercelli AT 13 2259 45993
Castello di Annone AT 13 1860 47853
Calamandrana AT 13 1761 49614
Casal Cermelli AL 13 1234 50848
Castelnuovo Calcea AT 14 759 51607
Quargnento AL 14 1398 53005
Rivalta Bormida AL 14 1446 54451
Montabone AT 14 333 54784
Strevi AL 15 2019 56803
Rocca d'Arazzo AT 15 936 57739
San Marzano Oliveto AT 15 1047 58786
Rocchetta Palafea AT 15 338 59124
Moasca AT 15 494 59618
Montaldo Scarampi AT 16 755 60373
Refrancore AT 16 1591 61964
Azzano d'Asti AT 16 391 62355
Acqui Terme AL 16 19896 82251
Alessandria AL 16 93943 176194
Fubine AL 16 1653 177847
Agliano Terme AT 16 1642 179489
Orsara Bormida AL 17 424 179913
Terzo AL 17 923 180836
Montegrosso d'Asti AT 17 2344 183180
Canelli AT 17 10485 193665
Bosco Marengo AL 18 2457 196122
Vigliano d'Asti AT 18 835 196957
Frugarolo AL 18 1968 198925
Predosa AL 18 2048 200973
Visone AL 18 1194 202167
Montaldo Bormida AL 19 664 202831
Fresonara AL 19 731 203562
Morsasco AL 19 679 204241
Bistagno AL 19 1887 206128
Mongardino AT 19 921 207049
Cassinasco AT 19 611 207660
Cuccaro Monferrato AL 19 340 208000
Sessame AT 19 271 208271
Viarigi AT 19 929 209200
Castagnole Monferrato AT 20 1245 210445
Melazzo AL 20 1325 211770
Castelletto Monferrato AL 20 1537 213307
Carpeneto AL 20 977 214284

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km SW of Alessandria (93943 inhabitants)
22 Km E of Asti (76202 inhabitants)
57 Km N of Savona (61345 inhabitants)
59 Km NW of Genova (586655 inhabitants)
64 Km SW of Vigevano (63310 inhabitants)
64 Km E of Moncalieri (57294 inhabitants)
67 Km E of Torino (890529 inhabitants)
69 Km SW of Pavia (72576 inhabitants)
71 Km S of Novara (104380 inhabitants)
86 Km NE of Cuneo (56081 inhabitants)
91 Km SW of Rho (50434 inhabitants)
92 Km SW of Milano (1345851 inhabitants)
93 Km SW of Legnano (60262 inhabitants)
94 Km SW of Busto Arsizio (83106 inhabitants)
97 Km S of Gallarate (53343 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
Reviewed
Rev100 		ML 1.8 2024-09-28
10:05:55		 44.8212 8.4557 21 2024-09-28
10:18:24		 Sala Sismica INGV-Roma 131746531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-09-28 10:05:55 ± 0.12
Latitude 44.8212 ± 0.0054
Longitude 8.4557 ± 0.0101
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 131746531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 733
Semi-minor axis of confidence ellipse (meter) 545
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 80
Circular confidence region, given by single value of horizontal uncertainty (meter) 730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 62
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.76357
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 131746531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-09-28 10:18:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCRV.HHZ. 2024-09-28T10:07:46.87 3.0 undecidable manual Pg 17.27 0
IV.MODR.HHZ. 2024-09-28T10:07:34.60 3.0 undecidable manual Pg 18.35 0
IV.CAFI.HHZ. 2024-09-28T10:07:31.96 3.0 undecidable manual Sg 12.91 0
IT.VALS.HNZ. 2024-09-28T10:07:25.32 3.0 undecidable manual Sg 9.53 0
IV.OSSC.HHZ. 2024-09-28T10:07:14.51 3.0 undecidable manual Sg 8.9 0
IV.FDMO.HHZ. 2024-09-28T10:07:05.66 3.0 positive manual Pg 11.42 0
IV.CSNT.HHZ. 2024-09-28T10:07:03.63 3.0 undecidable manual Sn -3.3 0
SI.LUSI.HHZ. 2024-09-28T10:07:01.51 3.0 undecidable manual Sg 2.99 0
IV.ATPI.EHZ. 2024-09-28T10:06:51.50 3.0 negative manual Pg 5.98 0
IV.MAGA.HHZ. 2024-09-28T10:06:51.92 3.0 undecidable manual Sg 0.3 0
MN.TUE.HHZ. 2024-09-28T10:06:47.56 0.3 undecidable manual S 20 195.7596 54 0.16 45
IV.STAL.HHZ. 2024-09-28T10:06:46.78 3.0 undecidable manual Pn -1.08 0
CH.FUSIO.HHZ. 2024-09-28T10:06:45.19 0.6 undecidable manual S 5 181.9845 54 0.77 27
ST.PANI.EHZ. 2024-09-28T10:06:42.41 3.0 negative manual Pg 7.63 0
IV.RIBO.EHZ.01 2024-09-28T10:06:40.41 3.0 negative manual Pg 2.23 0
IV.CSNT.HHZ. 2024-09-28T10:06:39.95 3.0 positive manual Pg 4.31 0
GU.SATI.HHZ. 2024-09-28T10:06:31.34 0.3 undecidable manual S 339 125.5743 95 -0.06 60
GU.CIRO.HHZ. 2024-09-28T10:06:26.62 0.6 undecidable manual S 322 110.9001 96 -0.89 31
MN.TUE.HHZ. 2024-09-28T10:06:25.46 0.6 positive manual P 20 195.7596 54 0.08 30
CH.FUSIO.HHZ. 2024-09-28T10:06:24.55 1.0 undecidable manual P 5 181.9845 54 0.89 13
GU.BHB.HHZ. 2024-09-28T10:06:22.87 0.3 undecidable manual S 271 93.8394 97 -0.1 64
GU.CANO.HHZ. 2024-09-28T10:06:16.79 0.1 undecidable manual S 194 70.2741 100 0.05 90
GU.SATI.HHZ. 2024-09-28T10:06:15.94 0.1 undecidable manual P 339 125.5743 95 -0.2 78
GU.CIRO.HHZ. 2024-09-28T10:06:13.18 0.3 undecidable manual P 322 110.9001 96 -0.72 52
4P.IT06A.HHE. 2024-09-28T10:06:13.35 0.3 undecidable manual S 235 55.3002 103 0.51 64
GU.RNCA.HHE. 2024-09-28T10:06:13.25 0.6 undecidable manual S 135 55.1004 103 0.47 42
GU.BHB.HHZ. 2024-09-28T10:06:11.36 1.0 positive manual P 271 93.8394 97 0.08 22
GU.CANO.HHZ. 2024-09-28T10:06:07.44 0.3 positive manual P 194 70.2741 100 -0.24 66
GU.PCP.HHZ. 2024-09-28T10:06:06.08 0.3 undecidable manual S 167 31.8459 115 -0.81 60
IV.MONC.HHE. 2024-09-28T10:06:05.14 0.3 undecidable manual P 304 50.1165 105 0.5 65
GU.RNCA.HHE. 2024-09-28T10:06:05.81 0.1 undecidable manual P 135 55.1004 103 0.41 86
IV.QLNO.HHE. 2024-09-28T10:06:05.58 0.3 undecidable manual P 189 55.7997 103 0.08 69
4P.IT06A.HHE. 2024-09-28T10:06:05.50 0.1 undecidable manual P 235 55.3002 103 0.07 93
IV.SARZ.HHE. 2024-09-28T10:06:02.49 0.6 undecidable manual P 82 36.3414 112 -0.15 48
GU.ROTM.HHZ. 2024-09-28T10:06:02.73 0.1 undecidable manual S 291 8.6802 154 0.4 95
GU.PCP.HHZ. 2024-09-28T10:06:01.50 0.1 undecidable manual P 167 31.8459 115 -0.49 89
GU.ROTM.HHZ. 2024-09-28T10:05:59.27 0.1 positive manual P 291 8.6802 154 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.ROTM.HHE. ML:2.6 0.003022431 0.18 AML other m 2024-09-28T10:06:02.98
GU.ROTM.HHN. ML:2.6 0.002839696 0.22 AML other m 2024-09-28T10:06:02.93
GU.CANO.HHN. ML:2.0 0.00015535779999999998 0.3 AML other m 2024-09-28T10:06:17.81
GU.CANO.HHE. ML:2.0 0.00017082555 0.28 AML other m 2024-09-28T10:06:20.11
GU.SATI.HHN. ML:1.8 0.000040806889999999996 0.22 AML other m 2024-09-28T10:06:32.70
GU.SATI.HHE. ML:1.8 0.00004379639 0.2 AML other m 2024-09-28T10:06:33.34
GU.PCP.HHE. ML:1.9 0.00027892985 0.18 AML other m 2024-09-28T10:06:06.11
GU.BHB.HHN. ML:1.4 0.000028817465 0.26 AML other m 2024-09-28T10:06:25.60
GU.BHB.HNN. ML:1.6 0.000040806195 0.3 AML other m 2024-09-28T10:06:25.60
GU.BHB.HHE. ML:1.4 0.00002689175 0.38 AML other m 2024-09-28T10:06:23.24
GU.CIRO.HHN. ML:1.1 0.000011064653 0.14 AML other m 2024-09-28T10:06:27.66
GU.CIRO.HHE. ML:1.3 0.000014265055 0.18 AML other m 2024-09-28T10:06:28.02
GU.SATI.HNE. ML:1.8 0.000043467996999999996 0.11 AML other m 2024-09-28T10:06:34.76
GU.SATI.HNN. ML:2.0 0.000058574565000000004 0.32 AML other m 2024-09-28T10:06:32.23
CH.FUSIO.HHE. ML:1.6 0.000017205045 0.23 AML other m 2024-09-28T10:06:45.99
MN.TUE.HHE. ML:1.8 0.00001803789 0.28 AML other m 2024-09-28T10:06:48.41
MN.TUE.HHN. ML:1.7 0.000016636679000000002 0.24 AML other m 2024-09-28T10:06:48.61
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