Earthquake with magnitude of ML 1.9 on date 11-09-2020 and time 19:54:03 (UTC) in region 3 km E Tassarolo (AL)

A magnitude ML 1.9 earthquake occured in region: 3 km E Tassarolo (AL), on

  • 11-09-2020 19:54:03 (UTC)
  • 11-09-2020 21:54:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.725, 8.803 at 26 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Tassarolo AL 3 672 672
Gavi AL 4 4614 5286
Novi Ligure AL 4 28154 33440
Serravalle Scrivia AL 5 6128 39568
Stazzano AL 5 2486 42054
Pasturana AL 5 1318 43372
San Cristoforo AL 5 608 43980
Francavilla Bisio AL 6 531 44511
Cassano Spinola AL 7 1731 46242
Parodi Ligure AL 7 715 46957
Vignole Borbera AL 7 2182 49139
Carrosio AL 8 510 49649
Arquata Scrivia AL 8 6409 56058
Pozzolo Formigaro AL 8 4775 60833
Bosio AL 9 1227 62060
Montaldeo AL 9 265 62325
Gavazzana AL 9 180 62505
Sardigliano AL 9 406 62911
Castelletto d'Orba AL 9 2047 64958
Capriata d'Orba AL 9 1904 66862
Basaluzzo AL 9 2087 68949
Mornese AL 10 737 69686
Silvano d'Orba AL 11 1988 71674
Villalvernia AL 11 955 72629
Borghetto di Borbera AL 11 1966 74595
Fresonara AL 11 731 75326
Casaleggio Boiro AL 11 372 75698
Sant'Agata Fossili AL 12 425 76123
Predosa AL 12 2048 78171
Voltaggio AL 12 738 78909
Carezzano AL 12 431 79340
Lerma AL 12 869 80209
Paderna AL 13 220 80429
Grondona AL 13 510 80939
Castellania AL 13 90 81029
Rocca Grimalda AL 14 1512 82541
Spineto Scrivia AL 14 337 82878
Tagliolo Monferrato AL 14 1581 84459
Costa Vescovato AL 15 335 84794
Bosco Marengo AL 15 2457 87251
Isola del Cantone GE 15 1540 88791
Carbonara Scrivia AL 15 1122 89913
Avolasca AL 16 294 90207
Ovada AL 16 11477 101684
Belforte Monferrato AL 16 515 102199
Villaromagnano AL 16 715 102914
Fraconalto AL 16 336 103250
Frugarolo AL 16 1968 105218
Carpeneto AL 16 977 106195
Cerreto Grue AL 17 323 106518
Garbagna AL 17 696 107214
Montaldo Bormida AL 17 664 107878
Montegioco AL 18 313 108191
Ronco Scrivia GE 18 4417 112608
Sarezzano AL 18 1171 113779
Trisobbio AL 18 655 114434
Roccaforte Ligure AL 19 136 114570
Casal Cermelli AL 19 1234 115804
Cantalupo Ligure AL 19 527 116331
Orsara Bormida AL 19 424 116755
Sezzadio AL 19 1246 118001
Castelspina AL 20 416 118417
Cremolino AL 20 1086 119503
Tortona AL 20 27437 146940
Molare AL 20 2181 149121
Rocchetta Ligure AL 20 200 149321
Casasco AL 20 129 149450
Rivalta Bormida AL 20 1446 150896

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SE of Alessandria (93943 inhabitants)
36 Km NW of Genova (586655 inhabitants)
51 Km E of Asti (76202 inhabitants)
53 Km NE of Savona (61345 inhabitants)
59 Km SW of Pavia (72576 inhabitants)
66 Km S of Vigevano (63310 inhabitants)
79 Km W of Piacenza (102191 inhabitants)
82 Km S of Novara (104380 inhabitants)
88 Km SW of Milano (1345851 inhabitants)
92 Km S of Rho (50434 inhabitants)
93 Km E of Moncalieri (57294 inhabitants)
96 Km SW of Sesto San Giovanni (81608 inhabitants)
97 Km E of Torino (890529 inhabitants)
97 Km S of Legnano (60262 inhabitants)
98 Km SW of Cinisello Balsamo (75078 inhabitants)
99 Km S of Busto Arsizio (83106 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 1.9 2020-09-11
19:54:03
44.7247 8.8032 26 2021-02-26
14:55:56
Bollettino Sismico Italiano INGV 83330161
Reviewed
Rev100
ML 1.8 2020-09-11
19:54:04
44.7053 8.772 10 2020-09-11
20:02:49
Sala Sismica INGV-Roma 82824601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-11 19:54:03 ± 0.14
Latitude 44.7247 ± 0.0090
Longitude 8.8032 ± 0.0114
Depth (km) 26 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83330161

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 834
Semi-minor axis of confidence ellipse (meter) 654
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 314
Circular confidence region, given by single value of horizontal uncertainty (meter) 830
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 58
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 27
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
Epicentral distance of station farthest from the epicenter (degree) 1.79055
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 83330161
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-27 18:02:47

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 82824601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-11 20:02:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BARO.EHZ. 2020-09-11T19:55:54.02 3.0 undecidable manual Sg 17.139999 0
IV.COR1.EHZ. 2020-09-11T19:55:50.91 3.0 undecidable manual Sg 19 0
IV.FDMO.HHZ. 2020-09-11T19:55:40.43 3.0 undecidable manual Sn 0.83 0
IV.SGTA.HHZ. 2020-09-11T19:55:40.42 3.0 undecidable manual Pn 8.74 0
IV.ASSB.HHZ. 2020-09-11T19:55:38.45 3.0 undecidable manual Sn 5.53 0
IV.MAON.HHZ. 2020-09-11T19:55:33.82 3.0 undecidable manual Sg 10.99 0
IV.ROSPO.HHZ. 2020-09-11T19:55:27.71 3.0 positive manual Pn 8.38 0
IV.PTRJ.HNZ. 2020-09-11T19:55:26.41 3.0 positive manual Pn 3.44 0
IV.FREG.EHZ. 2020-09-11T19:54:51.07 3.0 positive manual Pn 3.62 0
ST.RONC.EHZ. 2020-09-11T19:54:34.08 0.3 undecidable manual P 45 1.7905 54 0.47 44
GU.SATI.HHZ. 2020-09-11T19:54:27.53 0.3 undecidable manual P 331 1.3247 54 0.36 58
GU.CANO.HHZ. 2020-09-11T19:54:26.25 0.6 undecidable manual S 218 0.6556 104 0.24 47
GU.CIRO.HHZ. 2020-09-11T19:54:24.81 0.3 undecidable manual P 316 1.2357 54 -1.12 44
GU.TRAV.HHZ. 2020-09-11T19:54:24.23 0.3 undecidable manual P 317 1.0837 98 0.48 59
CH.MUGIO.HHN. 2020-09-11T19:54:24.80 0.3 undecidable manual P 8 1.2078 54 -0.76 53
IV.QLNO.HHZ. 2020-09-11T19:54:22.16 0.6 undecidable manual S 219 0.5162 108 0.12 50
GU.GBOS.HHZ. 2020-09-11T19:54:20.03 0.3 undecidable manual P 235 0.84 101 0.41 65
IV.BOB.HNE. 2020-09-11T19:54:20.53 0.6 undecidable manual S 84 0.4596 111 0.07 49
GU.RORO.HHE. 2020-09-11T19:54:19.33 0.3 undecidable manual P 221 0.8076 101 0.25 68
GU.GORR.HHN. 2020-09-11T19:54:18.57 0.6 undecidable manual S 108 0.3669 117 0.62 44
GU.ROTM.HHZ. 2020-09-11T19:54:18.43 0.3 undecidable manual S 291 0.3426 118 1.12 53
GU.GENL.EHN. 2020-09-11T19:54:17.68 0.6 undecidable manual S 160 0.3399 119 0.44 48
GU.CANO.HHZ. 2020-09-11T19:54:16.53 0.1 undecidable manual P 218 0.6556 104 -0.02 96
GU.RNCA.HHZ. 2020-09-11T19:54:15.46 0.6 undecidable manual S 157 0.2743 125 -0.12 51
IT.ACQ.HGZ. 2020-09-11T19:54:14.58 0.6 undecidable manual S 260 0.2455 129 -0.32 49
IV.QLNO.HHZ. 2020-09-11T19:54:14.17 0.1 undecidable manual P 219 0.5162 108 -0.08 97
GU.PCP.HHZ. 2020-09-11T19:54:14.73 0.3 undecidable manual S 225 0.259 127 -0.49 70
IV.BOB.HNE. 2020-09-11T19:54:13.22 0.6 undecidable manual P 84 0.4596 111 -0.12 50
IV.SARZ.HHZ. 2020-09-11T19:54:13.27 0.6 undecidable manual S 29 0.1628 142 0.12 51
GU.GENL.EHN. 2020-09-11T19:54:12.08 0.3 undecidable manual P 160 0.3399 119 0.59 69
GU.ROTM.HHZ. 2020-09-11T19:54:12.01 0.1 undecidable manual P 291 0.3426 118 0.48 93
GU.GORR.HHN. 2020-09-11T19:54:11.82 0.3 undecidable manual P 108 0.3669 117 -0.07 76
GU.RNCA.HHZ. 2020-09-11T19:54:10.32 0.1 positive manual P 157 0.2743 125 -0.21 100
IT.ACQ.HGZ. 2020-09-11T19:54:09.79 0.3 undecidable manual P 260 0.2455 129 -0.35 74
GU.PCP.HHZ. 2020-09-11T19:54:09.87 0.1 positive manual P 225 0.259 127 -0.45 95
IV.SARZ.HHZ. 2020-09-11T19:54:08.42 0.1 undecidable manual P 29 0.1628 142 -0.7 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PCP.HHE. ML:1.8 0.000209 1.58 AML other m 2020-09-11T19:54:14.97
GU.PCP.HHN. ML:1.7 0.0001685 0.62 AML other m 2020-09-11T19:54:15.04
GU.RNCA.HHE. ML:1.6 0.000139 0.6 AML other m 2020-09-11T19:54:15.47
GU.RNCA.HHN. ML:1.6 0.000143 1.16 AML other m 2020-09-11T19:54:15.79
IV.SARZ.HHE. ML:2.2 0.0007565 0.34 AML other m 2020-09-11T19:54:16.59
IV.SARZ.HNE. ML:2.2 0.000718 0.32 AML other m 2020-09-11T19:54:16.76
IV.SARZ.HNN. ML:2.1 0.0005845 1.62 AML other m 2020-09-11T19:54:18.17
IV.SARZ.HHN. ML:2.1 0.000595 1.62 AML other m 2020-09-11T19:54:18.17
GU.ROTM.HHE. ML:2.1 0.000349 0.2 AML other m 2020-09-11T19:54:19.31
GU.ROTM.HHN. ML:2.1 0.0003445 1.6 AML other m 2020-09-11T19:54:20.10
GU.CANO.HHE. ML:2 0.000129 0.8 AML other m 2020-09-11T19:54:29.04
GU.CANO.HHN. ML:1.9 0.00011015 1.74 AML other m 2020-09-11T19:54:30.90
GU.TRAV.HHE. ML:1.8 4.92E-5 0.82 AML other m 2020-09-11T19:54:39.80
GU.TRAV.HHN. ML:2 6.805E-5 0.54 AML other m 2020-09-11T19:54:41.34
GU.CIRO.HHE. ML:1.6 2.43E-5 1.16 AML other m 2020-09-11T19:54:43.11
GU.CIRO.HHN. ML:1.9 4.28E-5 0.42 AML other m 2020-09-11T19:54:44.47
GU.SATI.HHN. ML:1.8 3.63E-5 0.58 AML other m 2020-09-11T19:54:46.29
GU.SATI.HHE. ML:2 5.265E-5 0.7 AML other m 2020-09-11T19:54:46.40
IV.FDMO.HHN. ML:2.5 1.995E-5 0.34 AML other m 2020-09-11T19:55:42.77
IV.FDMO.HHE. ML:2.5 1.895E-5 0.08 AML other m 2020-09-11T19:55:42.66
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