Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 21-04-2020 and time 20:31:44 (UTC) in region 2 km W Lirio (PV)

A magnitude ML 2.1 earthquake occured in region: 2 km W Lirio (PV), on

  • 21-04-2020 20:31:44 (UTC)
  • 21-04-2020 22:31:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.0010, 9.2330 at 28 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
Lirio PV 2 122 122
Mornico Losana PV 2 641 763
Pietra de' Giorgi PV 2 862 1625
Montalto Pavese PV 3 890 2515
Rocca de' Giorgi PV 4 87 2602
Cigognola PV 4 1351 3953
Castana PV 4 721 4674
Oliva Gessi PV 5 176 4850
Redavalle PV 5 1069 5919
Torricella Verzate PV 5 844 6763
Montecalvo Versiggia PV 5 521 7284
Calvignano PV 5 122 7406
Santa Giuletta PV 6 1643 9049
Santa Maria della Versa PV 6 2430 11479
Corvino San Quirico PV 6 1039 12518
Montescano PV 6 404 12922
Canneto Pavese PV 7 1353 14275
Canevino PV 7 109 14384
Golferenzo PV 7 190 14574
Volpara PV 7 134 14708
Broni PV 7 9364 24072
Montù Beccaria PV 8 1690 25762
Borgo Priolo PV 8 1474 27236
Borgoratto Mormorolo PV 8 432 27668
Casteggio PV 9 6805 34473
Robecco Pavese PV 9 565 35038
Barbianello PV 9 872 35910
Ruino PV 9 723 36633
Pinarolo Po PV 9 1696 38329
Rovescala PV 9 901 39230
Casatisma PV 9 899 40129
Fortunago PV 10 390 40519
Zenevredo PV 10 486 41005
San Damiano al Colle PV 10 656 41661
Stradella PV 10 11622 53283
Montebello della Battaglia PV 10 1628 54911
Campospinoso PV 11 1032 55943
Casanova Lonati PV 11 458 56401
Verretto PV 11 395 56796
Bressana Bottarone PV 11 3529 60325
Torrazza Coste PV 12 1680 62005
Caminata PC 12 252 62257
Albaredo Arnaboldi PV 12 250 62507
Bosnasco PV 12 634 63141
San Cipriano Po PV 13 488 63629
Nibbiano PC 13 2177 65806
Portalbera PV 13 1524 67330
Lungavilla PV 13 2429 69759
Castelletto di Branduzzo PV 13 1033 70792
Verrua Po PV 13 1272 72064
Montesegale PV 13 298 72362
Ziano Piacentino PC 13 2556 74918
Rea PV 14 425 75343
Mezzanino PV 14 1440 76783
Val di Nizza PV 14 624 77407
Codevilla PV 15 997 78404
Rocca Susella PV 15 225 78629
Arena Po PV 15 1574 80203
Bastida Pancarana PV 15 1023 81226
Pianello Val Tidone PC 15 2202 83428
Zavattarello PV 15 991 84419
Pizzale PV 15 735 85154
Valverde PV 15 287 85441
Spessa PV 16 605 86046
San Zenone al Po PV 16 596 86642
Retorbido PV 16 1538 88180
Pancarana PV 17 316 88496
Borgonovo Val Tidone PC 17 7892 96388
Castel San Giovanni PC 17 13726 110114
Voghera PV 18 39421 149535
Godiasco Salice Terme PV 18 3229 152764
Zerbo PV 18 429 153193
Travacò Siccomario PV 18 4436 157629
Linarolo PV 18 2821 160450
Cervesina PV 18 1204 161654
Cava Manara PV 18 6707 168361
Pecorara PC 18 730 169091
Torre de' Negri PV 19 329 169420
Rivanazzano Terme PV 19 5312 174732
Costa de' Nobili PV 19 370 175102
Sommo PV 19 1145 176247
Valle Salimbene PV 19 1511 177758
Mezzana Rabattone PV 19 497 178255
San Martino Siccomario PV 19 6182 184437
Belgioioso PV 19 6187 190624
Ponte Nizza PV 20 807 191431
Romagnese PV 20 687 192118
Varzi PV 20 3279 195397

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km S of Pavia (72576 inhabitants)
37 Km W of Piacenza (102191 inhabitants)
46 Km SE of Vigevano (63310 inhabitants)
50 Km E of Alessandria (93943 inhabitants)
52 Km S of Milano (1345851 inhabitants)
59 Km S of Sesto San Giovanni (81608 inhabitants)
61 Km S of Rho (50434 inhabitants)
62 Km S of Cinisello Balsamo (75078 inhabitants)
64 Km W of Cremona (71901 inhabitants)
65 Km S of Monza (122671 inhabitants)
69 Km SE of Novara (104380 inhabitants)
70 Km NE of Genova (586655 inhabitants)
71 Km SE of Legnano (60262 inhabitants)
75 Km SE of Busto Arsizio (83106 inhabitants)
81 Km SE of Gallarate (53343 inhabitants)
82 Km E of Asti (76202 inhabitants)
84 Km SW of Bergamo (119381 inhabitants)
89 Km W of Parma (192836 inhabitants)
91 Km S of Como (84495 inhabitants)
96 Km SE of Varese (80799 inhabitants)
97 Km NE of Savona (61345 inhabitants)
98 Km SW of Brescia (196480 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 2.1 2020-04-21
20:31:44		 45.001 9.2332 28 2020-07-18
21:08:39		 Bollettino Sismico Italiano INGV 79896071
Reviewed
Rev100 		ML 2.1 2020-04-21
20:31:44		 45.0057 9.2255 27 2020-04-21
20:39:40		 Sala Sismica INGV-Roma 78449581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-21 20:31:44 ± 0.11
Latitude 45.0010 ± 0.0072
Longitude 9.2332 ± 0.0153
Depth (km) 28 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 79896071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 971
Semi-minor axis of confidence ellipse (meter) 874
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 129
Circular confidence region, given by single value of horizontal uncertainty (meter) 970.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 57
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.53424
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 79896071
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-04 13:29:22

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 26
Type of magnitude ML
Reference to an origin 78449581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-21 20:39:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ROSPO.HHZ. 2020-04-21T20:33:13.38 3.0 undecidable manual Pg 17 0
IV.GATE.HHZ. 2020-04-21T20:33:07.19 3.0 negative manual Pn 4.9 0
IV.PTRJ.HHZ. 2020-04-21T20:33:00.12 3.0 undecidable manual Pn -0.62 0
IV.VIVA.HHZ. 2020-04-21T20:32:53.62 3.0 undecidable manual Pn 9.12 0
IV.RIBO.EHZ.01 2020-04-21T20:32:20.34 3.0 negative manual Pn -0.47 0
IV.SALO.HHZ. 2020-04-21T20:32:20.04 1.0 undecidable manual S 55 121.7892 54 0.91 18
IV.CTI.HHZ. 2020-04-21T20:32:16.17 3.0 undecidable manual P -0.51 0
IV.ZONE.HHZ. 2020-04-21T20:32:16.56 0.3 undecidable manual S 39 109.113 100 0.51 63
CH.MUGIO.HHZ. 2020-04-21T20:32:14.15 0.6 undecidable manual S 352 103.2189 101 -0.37 45
IV.MDI.HHZ. 2020-04-21T20:32:12.10 0.6 undecidable manual S 24 93.24 102 0.21 46
MN.TUE.HHZ. 2020-04-21T20:32:09.73 0.3 undecidable manual P 3 163.4142 54 0.23 58
SI.LUSI.HHZ. 2020-04-21T20:32:09.74 0.3 undecidable manual P 51 170.2962 54 -0.61 51
IV.MABI.HHZ. 2020-04-21T20:32:08.50 0.3 undecidable manual P 40 153.5352 54 0.23 61
ST.RONC.EHZ. 2020-04-21T20:32:08.01 0.3 undecidable manual P 44 153.2355 54 -0.22 61
IV.MBAL.EHZ. 2020-04-21T20:32:07.44 0.3 undecidable manual P 58 148.4403 54 -0.19 63
IV.MAGA.HHZ. 2020-04-21T20:32:06.73 0.3 undecidable manual P 51 138.5613 54 0.33 62
GU.RORO.HHZ. 2020-04-21T20:32:06.80 0.3 undecidable manual P 223 135.0648 54 0.84 53
GU.TRAV.HHZ. 2020-04-21T20:32:04.80 0.6 undecidable manual P 297 129.1707 54 -0.44 41
IV.SALO.HHZ. 2020-04-21T20:32:04.72 0.1 undecidable manual P 55 121.7892 54 0.4 85
IV.ZONE.HHZ. 2020-04-21T20:32:02.20 0.3 undecidable manual P 39 109.113 100 -0.34 66
IV.PRMA.HHZ. 2020-04-21T20:32:01.84 0.6 undecidable manual P 107 88.8444 103 2.36 13
IV.VARE.HHZ. 2020-04-21T20:32:01.17 0.3 undecidable manual P 340 102.7194 101 -0.4 67
CH.MUGIO.HHZ. 2020-04-21T20:32:01.12 0.3 undecidable manual P 352 103.2189 101 -0.53 64
IV.QLNO.HHE. 2020-04-21T20:32:01.61 0.6 undecidable manual P 223 102.6195 101 0.05 48
GU.GRAM.HHZ. 2020-04-21T20:32:00.72 1.0 undecidable manual P 130 86.6466 103 1.58 13
GU.GORR.HHE. 2020-04-21T20:31:59.17 0.6 undecidable manual S 174 43.9227 117 -0.21 51
IV.MDI.HHZ. 2020-04-21T20:31:59.79 0.6 undecidable manual P 24 93.24 102 -0.35 46
GU.PCP.HHZ. 2020-04-21T20:31:57.26 0.1 undecidable manual P 227 74.37 105 -0.06 100
IV.SARZ.HHZ. 2020-04-21T20:31:57.17 0.6 undecidable manual S 240 29.1486 129 1.12 38
IV.MERA.HNE. 2020-04-21T20:31:57.79 0.1 undecidable manual P 11 79.6647 104 -0.31 95
IV.BOB.HHE. 2020-04-21T20:31:56.50 0.3 undecidable manual S 147 30.8469 127 0.08 81
GU.RNCA.HHE. 2020-04-21T20:31:55.54 0.3 undecidable manual P 201 62.7927 108 -0.07 76
IV.EUCT.HNE. 2020-04-21T20:31:55.90 0.6 undecidable manual S 341 23.6541 136 0.93 41
GU.GORR.HHE. 2020-04-21T20:31:52.28 0.1 undecidable manual P 174 43.9227 117 -0.63 91
IV.SARZ.HHZ. 2020-04-21T20:31:51.46 0.3 undecidable manual P 240 29.1486 129 0.47 75
IV.BOB.HHE. 2020-04-21T20:31:50.74 0.1 undecidable manual P 147 30.8469 127 -0.46 99
IV.EUCT.HNE. 2020-04-21T20:31:50.14 0.3 undecidable manual P 341 23.6541 136 -0.23 80
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SARZ.HHN. ML:2.0 0.00036315275000000003 0.3456 AML other m 2020-04-21T20:32:03.42
IV.SARZ.HHE. ML:1.9 0.0002831219 0.3584 AML other m 2020-04-21T20:32:02.07
IV.SARZ.HNN. ML:2.0 0.0003302693 0.3456 AML other m 2020-04-21T20:32:03.42
IV.SARZ.HNE. ML:2.1 0.0004322724 0.8832 AML other m 2020-04-21T20:31:59.44
IV.MDI.HNE. ML:2.0 0.00009285107500000001 0.1408 AML other m 2020-04-21T20:32:12.89
IV.MDI.HNN. ML:2.3 0.0001960256 1.1392 AML other m 2020-04-21T20:32:25.39
IV.MDI.HHE. ML:2.0 0.0000998743 0.1408 AML other m 2020-04-21T20:32:14.04
IV.MDI.HHN. ML:1.8 0.00006404762 0.192 AML other m 2020-04-21T20:32:14.99
GU.GRAM.HHE. ML:1.9 0.000085576795 0.384 AML other m 2020-04-21T20:32:02.50
GU.GRAM.HHN. ML:1.8 0.000065299835 0.3328 AML other m 2020-04-21T20:32:13.06
CH.MUGIO.HHN. ML:1.7 0.00004658914 0.2432 AML other m 2020-04-21T20:32:16.38
CH.MUGIO.HHE. ML:2.0 0.000082198715 0.448 AML other m 2020-04-21T20:32:14.64
IV.VARE.HHE. ML:1.4 0.000026143825000000004 0.2432 AML other m 2020-04-21T20:32:15.10
IV.VARE.HHN. ML:1.6 0.000038044175 0.3072 AML other m 2020-04-21T20:32:18.91
IV.ZONE.HHN. ML:1.9 0.000061706065 0.2176 AML other m 2020-04-21T20:32:20.06
IV.ZONE.HHE. ML:2.0 0.00007584722000000001 0.2048 AML other m 2020-04-21T20:32:18.80
IV.SALO.HHE. ML:2.2 0.00012022315 0.3456 AML other m 2020-04-21T20:32:21.64
IV.SALO.HNE. ML:2.3 0.00014338439 0.3328 AML other m 2020-04-21T20:32:21.64
IV.SALO.HNN. ML:2.4 0.00016596955 0.8064 AML other m 2020-04-21T20:32:32.34
IV.SALO.HHN. ML:2.2 0.0001206058 0.2176 AML other m 2020-04-21T20:32:22.30
GU.TRAV.HHE. ML:1.8 0.000042898979999999996 0.2432 AML other m 2020-04-21T20:32:27.36
GU.TRAV.HHN. ML:1.9 0.00005631188 0.2432 AML other m 2020-04-21T20:32:23.99
IV.MAGA.HHE. ML:2.6 0.00021263105 0.32 AML other m 2020-04-21T20:32:26.11
IV.MAGA.HHN. ML:2.5 0.00016789065 0.2688 AML other m 2020-04-21T20:32:25.56
IV.MBAL.EHE. ML:2.3 0.000102717695 0.128 AML other m 2020-04-21T20:32:29.28
IV.MBAL.EHN. ML:2.2 0.000090647475 0.1024 AML other m 2020-04-21T20:32:30.16
IV.MBAL.HNE. ML:2.4 0.000124207015 0.4864 AML other m 2020-04-21T20:32:19.84
IV.MBAL.HNN. ML:2.6 0.0001948757 0.7168 AML other m 2020-04-21T20:32:42.36
ST.RONC.HNN. ML:2.6 0.00019908715 0.64 AML other m 2020-04-21T20:32:13.75
ST.RONC.EHN. ML:2.4 0.00011408814999999999 0.384 AML other m 2020-04-21T20:32:31.23
ST.RONC.EHE. ML:2.4 0.00010988566 0.1792 AML other m 2020-04-21T20:32:28.76
ST.RONC.HNE. ML:3.0 0.0005299687 0.4608 AML other m 2020-04-21T20:32:32.16
IV.MABI.HHE. ML:1.7 0.000024293715000000002 0.2816 AML other m 2020-04-21T20:32:28.60
IV.MABI.HHN. ML:1.7 0.000026164514999999998 0.2432 AML other m 2020-04-21T20:32:27.98
MN.TUE.HHE. ML:1.7 0.000020677061 0.1792 AML other m 2020-04-21T20:32:31.22
MN.TUE.HHN. ML:1.6 0.000014293783 0.2048 AML other m 2020-04-21T20:32:34.69
SI.LUSI.HHN. ML:2.5 0.00012074110000000001 0.2944 AML other m 2020-04-21T20:32:33.54
SI.LUSI.HHE. ML:2.2 0.00006715510499999999 0.2816 AML other m 2020-04-21T20:32:33.98
IV.CTI.HHN. ML:2.2 0.00003689850999999999 0.1792 AML other m 2020-04-21T20:32:48.44
IV.CTI.HHE. ML:2.2 0.000042459794999999996 0.2048 AML other m 2020-04-21T20:32:48.47
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