Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 25-07-2022 and time 08:26:47 (Italy) in region 4 km E Varzi (PV)

A magnitude ML 1.8 earthquake occured in region: 4 km E Varzi (PV), on

  • 25-07-2022 06:26:47 (UTC)
  • 25-07-2022 08:26:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.8250, 9.2430 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
Varzi PV 4 3279 3279
Menconico PV 4 360 3639
Valverde PV 5 287 3926
Zavattarello PV 5 991 4917
Santa Margherita di Staffora PV 6 473 5390
Romagnese PV 7 687 6077
Val di Nizza PV 9 624 6701
Bagnaria PV 9 658 7359
Brallo di Pregola PV 10 599 7958
Fabbrica Curone AL 10 656 8614
Caminata PC 11 252 8866
Nibbiano PC 11 2177 11043
Gremiasco AL 11 324 11367
Fortunago PV 12 390 11757
Ruino PV 12 723 12480
Ponte Nizza PV 12 807 13287
Montacuto AL 12 278 13565
Borgoratto Mormorolo PV 12 432 13997
Pecorara PC 13 730 14727
Cecima PV 13 236 14963
Montesegale PV 13 298 15261
Bobbio PC 13 3577 18838
Canevino PV 14 109 18947
San Sebastiano Curone AL 15 583 19530
Volpara PV 15 134 19664
Rocca Susella PV 15 225 19889
Brignano-Frascata AL 16 456 20345
Golferenzo PV 16 190 20535
Coli PC 16 879 21414
Dernice AL 16 185 21599
Rocca de' Giorgi PV 16 87 21686
Corte Brugnatella PC 17 586 22272
Momperone AL 17 223 22495
Godiasco Salice Terme PV 17 3229 25724
Montecalvo Versiggia PV 17 521 26245
Montalto Pavese PV 18 890 27135
Borgo Priolo PV 18 1474 28609
Pozzol Groppo AL 18 328 28937
Zerba PC 18 77 29014
Santa Maria della Versa PV 18 2430 31444
Cerignale PC 18 127 31571
Calvignano PV 19 122 31693
Casasco AL 19 129 31822
Pianello Val Tidone PC 19 2202 34024
Lirio PV 19 122 34146
Albera Ligure AL 19 325 34471
Cantalupo Ligure AL 20 527 34998
Garbagna AL 20 696 35694
Montemarzino AL 20 341 36035

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km S of Pavia (72576 inhabitants)
44 Km SW of Piacenza (102191 inhabitants)
50 Km E of Alessandria (93943 inhabitants)
52 Km NE of Genova (586655 inhabitants)
63 Km SE of Vigevano (63310 inhabitants)
71 Km W of Cremona (71901 inhabitants)
72 Km S of Milano (1345851 inhabitants)
79 Km S of Sesto San Giovanni (81608 inhabitants)
80 Km S of Rho (50434 inhabitants)
82 Km S of Cinisello Balsamo (75078 inhabitants)
82 Km E of Asti (76202 inhabitants)
83 Km NE of Savona (61345 inhabitants)
85 Km SE of Novara (104380 inhabitants)
85 Km S of Monza (122671 inhabitants)
86 Km W of Parma (192836 inhabitants)
89 Km SE of Legnano (60262 inhabitants)
92 Km NW of La Spezia (93959 inhabitants)
93 Km SE of Busto Arsizio (83106 inhabitants)
99 Km SE 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
Bulletin
Rev1000 		ML 1.8 2022-07-25
06:26:47		 44.8252 9.2432 11 2023-01-31
19:03:47		 Bollettino Sismico Italiano INGV 110050911
Reviewed
Rev100 		ML 2.0 2022-07-25
06:26:47		 44.8013 9.2583 11 2022-07-25
06:37:16		 Sala Sismica INGV-Roma 107666901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-07-25 06:26:47 ± 0.27
Latitude 44.8252 ± 0.0162
Longitude 9.2432 ± 0.0139
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 110050911

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1810
Semi-minor axis of confidence ellipse (meter) 1110
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 359
Circular confidence region, given by single value of horizontal uncertainty (meter) 1810.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 191
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.67359
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 110050911
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-09-23 11:14:50

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 107666901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-07-25 06:37:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MAGA.HHZ. 2022-07-25T06:27:12.96 3.0 undecidable manual P 0.37 0
GU.CANO.HHZ. 2022-07-25T06:27:06.16 3.0 undecidable manual P 0.93 0
IV.PLMA.HHZ. 2022-07-25T06:27:03.83 3.0 undecidable manual P -0.1 0
GU.RNCA.HHZ. 2022-07-25T06:27:02.45 0.6 undecidable manual S 210 45.5211 50 0.43 44
GU.GRAM.HHZ. 2022-07-25T06:27:00.01 0.3 undecidable manual P 120 74.7696 50 -0.28 65
IV.MSSA.HHZ. 2022-07-25T06:26:57.64 0.3 undecidable manual P 159 60.495 50 -0.45 64
GU.RNCA.HHZ. 2022-07-25T06:26:56.41 0.3 undecidable manual P 210 45.5211 50 0.62 62
GU.GORR.HHZ. 2022-07-25T06:26:55.98 0.3 undecidable manual S 171 24.5532 50 -0.42 69
IV.BOB.HHZ. 2022-07-25T06:26:54.43 0.3 undecidable manual S 111 17.3715 121 0.13 74
GU.GORR.HHZ. 2022-07-25T06:26:52.55 0.1 positive manual P 171 24.5532 50 0.01 100
IV.SARZ.HHE. 2022-07-25T06:26:52.51 0.3 undecidable manual P 280 26.3514 50 -0.31 70
IV.BOB.HHZ. 2022-07-25T06:26:51.64 0.1 negative manual P 111 17.3715 121 0.31 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GORR.HHE. ML:2.0 0.000606 0.18 AML other m 2022-07-25T06:26:56.14
GU.GORR.HHN. ML:1.9 0.00050159555 0.16 AML other m 2022-07-25T06:26:56.25
GU.RNCA.HHN. ML:1.6 0.00011499999999999999 0.16 AML other m 2022-07-25T06:27:03.22
GU.RNCA.HHE. ML:1.7 0.00013436199999999999 0.1824 AML other m 2022-07-25T06:27:03.36
IV.PLMA.HHN. ML:1.7 0.0000574 0.3 AML other m 2022-07-25T06:27:17.53
IV.PLMA.HHE. ML:1.8 0.000058800000000000006 0.24 AML other m 2022-07-25T06:27:17.51
GU.CANO.HHN. ML:1.7 0.0000471 1.2 AML other m 2022-07-25T06:27:20.28
GU.CANO.HHE. ML:1.7 0.000049308515 1.2992 AML other m 2022-07-25T06:27:43.58
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
Waveforms Seismic signals in miniseed + resp format Download