Earthquake with magnitude of ML 1.4 on date 13-11-2021 and time 02:13:42 (UTC) in region 2 km E Oviglio (AL)

A magnitude ML 1.4 earthquake occured in region: 2 km E Oviglio (AL), on

  • 13-11-2021 02:13:42 (UTC)
  • 13-11-2021 03:13:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.859, 8.514 at 42 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Oviglio AL 2 1265 1265
Borgoratto Alessandrino AL 3 584 1849
Frascaro AL 4 440 2289
Carentino AL 5 340 2629
Castellazzo Bormida AL 5 4570 7199
Bergamasco AL 6 744 7943
Gamalero AL 6 844 8787
Solero AL 7 1645 10432
Felizzano AL 8 2344 12776
Castelspina AL 8 416 13192
Masio AL 8 1420 14612
Casal Cermelli AL 9 1234 15846
Sezzadio AL 9 1246 17092
Bruno AT 9 321 17413
Quattordio AL 10 1637 19050
Quargnento AL 10 1398 20448
Castelnuovo Belbo AT 10 895 21343
Alessandria AL 10 93943 115286
Mombaruzzo AT 11 1117 116403
Maranzana AT 11 277 116680
Incisa Scapaccino AT 12 2288 118968
Cerro Tanaro AT 12 626 119594
Cassine AL 12 2961 122555
Cortiglione AT 13 571 123126
Quaranti AT 13 183 123309
Castelnuovo Bormida AL 13 694 124003
Rocchetta Tanaro AT 13 1450 125453
Frugarolo AL 13 1968 127421
Bosco Marengo AL 14 2457 129878
Castelletto Molina AT 14 180 130058
Fontanile AT 14 567 130625
Fubine AL 14 1653 132278
Castelletto Monferrato AL 14 1537 133815
Ricaldone AL 14 684 134499
Belveglio AT 15 350 134849
Vaglio Serra AT 15 275 135124
Alice Bel Colle AL 15 766 135890
Nizza Monferrato AT 16 10429 146319
Cuccaro Monferrato AL 16 340 146659
Pietra Marazzi AL 16 904 147563
Castello di Annone AT 16 1860 149423
San Salvatore Monferrato AL 16 4299 153722
Refrancore AT 16 1591 155313
Fresonara AL 16 731 156044
Lu AL 16 1122 157166
Predosa AL 16 2048 159214
Vinchio AT 16 601 159815
Rivalta Bormida AL 17 1446 161261
Montecastello AL 17 321 161582
Castel Rocchero AT 17 395 161977
Strevi AL 18 2019 163996
Mombercelli AT 18 2259 166255
Rocca d'Arazzo AT 18 936 167191
Basaluzzo AL 18 2087 169278
Viarigi AT 18 929 170207
Castel Boglione AT 18 609 170816
Altavilla Monferrato AL 19 468 171284
Conzano AL 19 979 172263
Camagna Monferrato AL 19 528 172791
Orsara Bormida AL 19 424 173215
Pecetto di Valenza AL 19 1267 174482
Vignale Monferrato AL 19 1006 175488
Azzano d'Asti AT 19 391 175879
Calamandrana AT 19 1761 177640
Castelnuovo Calcea AT 20 759 178399
Mirabello Monferrato AL 20 1374 179773
Castagnole Monferrato AT 20 1245 181018
Capriata d'Orba AL 20 1904 182922

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km SW of Alessandria (93943 inhabitants)
25 Km E of Asti (76202 inhabitants)
58 Km SW of Vigevano (63310 inhabitants)
60 Km NW of Genova (586655 inhabitants)
61 Km N of Savona (61345 inhabitants)
63 Km SW of Pavia (72576 inhabitants)
66 Km S of Novara (104380 inhabitants)
67 Km E of Moncalieri (57294 inhabitants)
70 Km E of Torino (890529 inhabitants)
85 Km SW of Rho (50434 inhabitants)
86 Km SW of Milano (1345851 inhabitants)
88 Km SW of Legnano (60262 inhabitants)
88 Km SW of Busto Arsizio (83106 inhabitants)
92 Km NE of Cuneo (56081 inhabitants)
92 Km S of Gallarate (53343 inhabitants)
94 Km SW of Sesto San Giovanni (81608 inhabitants)
95 Km W of Piacenza (102191 inhabitants)
95 Km SW of Cinisello Balsamo (75078 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.4 2021-11-13
02:13:42
44.8587 8.5135 42 2021-11-13
02:25:19
Sala Sismica INGV-Roma 97428311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-13 02:13:42 ± 0.2
Latitude 44.8587 ± 0.0144
Longitude 8.5135 ± 0.0228
Depth (km) 42 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97428311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1971
Semi-minor axis of confidence ellipse (meter) 1061
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 238
Circular confidence region, given by single value of horizontal uncertainty (meter) 1970
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 176
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.11421
Epicentral distance of station farthest from the epicenter (degree) 0.67989
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 97428311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-13 02:25:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.CANO.HHZ. 2021-11-13T02:15:05.87 0.6 undecidable manual S 0.6799 6.009 0
GU.CANO.HHZ. 2021-11-13T02:14:05.88 0.1 undecidable manual P 0.6799 1.006 0
GU.GORR.HHE. 2021-11-13T02:14:04.14 0.6 undecidable manual S 114 0.6079 99 0.08 46
IV.QLNO.HHZ. 2021-11-13T02:14:02.81 0.3 undecidable manual S 193 0.5468 101 0.17 68
GU.RNCA.HHZ. 2021-11-13T02:14:01.88 0.3 undecidable manual S 141 0.4964 105 0.41 66
GU.PCP.HHZ. 2021-11-13T02:13:57.05 0.3 undecidable manual S 176 0.3184 125 -0.53 67
GU.ROTM.HHZ. 2021-11-13T02:13:54.83 0.3 undecidable manual S 265 0.1142 158 0.31 71
IV.QLNO.HHZ. 2021-11-13T02:13:54.26 0.1 undecidable manual P 193 0.5468 101 0.25 90
GU.GORR.HHE. 2021-11-13T02:13:54.72 0.1 undecidable manual P 114 0.6079 99 -0.12 90
GU.RNCA.HHZ. 2021-11-13T02:13:53.28 0.1 undecidable manual P 141 0.4964 105 -0.06 94
IV.MONC.HHE. 2021-11-13T02:13:52.91 0.1 undecidable manual P 298 0.4667 107 -0.03 96
GU.PCP.HHZ. 2021-11-13T02:13:50.72 1.0 positive manual P 176 0.3184 125 -0.37 23
GU.ROTM.HHZ. 2021-11-13T02:13:49.14 0.1 negative manual P 265 0.1142 158 -0.19 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.CANO.HHE. ML:2.3 0.00025658075 0.3408 AML other m 2021-11-13T02:14:07.52
GU.CANO.HHN. ML:2.2 0.000204 0.28 AML other m 2021-11-13T02:14:07.53
GU.ROTM.HHE. ML:1.8 0.0002206053 0.2 AML other m 2021-11-13T02:13:55.20
GU.ROTM.HHN. ML:1.7 0.0001726845915 0.1792 AML other m 2021-11-13T02:13:55.37
GU.PCP.HHE. ML:1.4 6.129017E-5 0.2592 AML other m 2021-11-13T02:13:57.47
GU.PCP.HHN. ML:1.1 3.00057E-5 0.12 AML other m 2021-11-13T02:13:58.16
GU.RNCA.HHE. ML:1.3 3.372786E-5 0.2992 AML other m 2021-11-13T02:14:03.22
IV.QLNO.HHE. ML:1.1 2.0291355E-5 0.2592 AML other m 2021-11-13T02:14:04.41
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