Earthquake with magnitude of ML 1.4 on date 21-05-2022 and time 02:36:00 (Italy) in region 4 km E Solero (AL)

A magnitude ML 1.4 earthquake occured in region: 4 km E Solero (AL), on

  • 21-05-2022 00:36:00 (UTC)
  • 21-05-2022 02:36:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.9180, 8.5580 at 52 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
Solero AL 4 1645 1645
Alessandria AL 5 93943 95588
Quargnento AL 6 1398 96986
Castelletto Monferrato AL 7 1537 98523
Castellazzo Bormida AL 8 4570 103093
Oviglio AL 9 1265 104358
San Salvatore Monferrato AL 9 4299 108657
Borgoratto Alessandrino AL 9 584 109241
Pietra Marazzi AL 9 904 110145
Felizzano AL 10 2344 112489
Frascaro AL 10 440 112929
Casal Cermelli AL 10 1234 114163
Montecastello AL 11 321 114484
Lu AL 11 1122 115606
Cuccaro Monferrato AL 11 340 115946
Fubine AL 12 1653 117599
Pecetto di Valenza AL 12 1267 118866
Carentino AL 12 340 119206
Quattordio AL 12 1637 120843
Gamalero AL 12 844 121687
Castelspina AL 13 416 122103
Bergamasco AL 13 744 122847
Masio AL 13 1420 124267
Valenza AL 13 19178 143445
Frugarolo AL 13 1968 145413
Mirabello Monferrato AL 13 1374 146787
Conzano AL 14 979 147766
Bosco Marengo AL 14 2457 150223
Rivarone AL 14 381 150604
Sezzadio AL 15 1246 151850
Piovera AL 15 851 152701
Camagna Monferrato AL 15 528 153229
Giarole AL 16 718 153947
Cerro Tanaro AT 16 626 154573
Occimiano AL 16 1319 155892
Vignale Monferrato AL 16 1006 156898
Altavilla Monferrato AL 17 468 157366
Pomaro Monferrato AL 17 355 157721
Bruno AT 17 321 158042
Refrancore AT 17 1591 159633
Bassignana AL 17 1709 161342
Viarigi AT 17 929 162271
Bozzole AL 17 319 162590
Castelnuovo Belbo AT 17 895 163485
Frascarolo PV 18 1209 164694
Rocchetta Tanaro AT 18 1450 166144
Fresonara AL 18 731 166875
Torre Beretti e Castellaro PV 18 567 167442
Mombaruzzo AT 18 1117 168559
Incisa Scapaccino AT 18 2288 170847
Frassinello Monferrato AL 19 502 171349
Maranzana AT 19 277 171626
Cortiglione AT 19 571 172197
Cassine AL 19 2961 175158
Alluvioni Cambiò AL 19 912 176070
Suardi PV 19 624 176694
Castelnuovo Bormida AL 19 694 177388
Borgo San Martino AL 19 1428 178816
Castello di Annone AT 20 1860 180676
Montemagno AT 20 1153 181829
Ticineto AL 20 1371 183200
Predosa AL 20 2048 185248

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km W of Alessandria (93943 inhabitants)
28 Km E of Asti (76202 inhabitants)
51 Km SW of Vigevano (63310 inhabitants)
56 Km SW of Pavia (72576 inhabitants)
59 Km S of Novara (104380 inhabitants)
64 Km NW of Genova (586655 inhabitants)
68 Km N of Savona (61345 inhabitants)
69 Km E of Moncalieri (57294 inhabitants)
71 Km E of Torino (890529 inhabitants)
78 Km SW of Rho (50434 inhabitants)
79 Km SW of Milano (1345851 inhabitants)
80 Km SW of Legnano (60262 inhabitants)
81 Km SW of Busto Arsizio (83106 inhabitants)
85 Km S of Gallarate (53343 inhabitants)
87 Km SW of Sesto San Giovanni (81608 inhabitants)
88 Km SW of Cinisello Balsamo (75078 inhabitants)
91 Km W of Piacenza (102191 inhabitants)
93 Km SW of Monza (122671 inhabitants)
99 Km NE of Cuneo (56081 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.4 2022-05-21
00:36:00
44.9183 8.558 52 2022-05-21
00:55:43
Sala Sismica INGV-Roma 104929931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-05-21 00:36:00 ± 0.34
Latitude 44.9183 ± 0.0171
Longitude 8.5580 ± 0.0356
Depth (km) 52 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 104929931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2821
Semi-minor axis of confidence ellipse (meter) 950
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 243
Circular confidence region, given by single value of horizontal uncertainty (meter) 2820.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 129
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.06390
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 104929931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-05-21 00:55:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2022-05-21T00:37:59.06 3.0 undecidable manual Sg 18.16 0
IV.SNTG.HHZ. 2022-05-21T00:37:53.27 3.0 undecidable manual Sg 18.48 0
IV.SAMA.EHZ. 2022-05-21T00:37:09.52 3.0 undecidable manual Pn 5.77 0
MN.TRI.HHZ. 2022-05-21T00:37:07.81 3.0 undecidable manual Pg 12.34 0
IV.CESI.HHZ. 2022-05-21T00:37:02.92 3.0 positive manual Pn 7.96 0
IV.FRON.EHZ. 2022-05-21T00:36:55.75 3.0 undecidable manual Pn 5.93 0
GU.RORO.HHZ. 2022-05-21T00:36:28.70 0.6 undecidable manual S 204 0.8777 104 -0.42 37
GU.RNCA.HHZ. 2022-05-21T00:36:21.49 0.6 undecidable manual S 148 0.5270 119 0.23 46
GU.ENR.HHZ. 2022-05-21T00:36:19.37 0.6 undecidable manual P 230 1.0639 100 -0.17 41
GU.PCP.HHZ. 2022-05-21T00:36:18.29 1.0 undecidable manual S 181 0.3768 131 -0.03 23
CH.MUGIO.HHZ. 2022-05-21T00:36:18.83 1.0 undecidable manual P 19 1.0585 100 -0.63 21
GU.RORO.HHZ. 2022-05-21T00:36:17.81 0.3 negative manual P 204 0.8777 104 0.79 56
GU.CIRO.HHZ. 2022-05-21T00:36:17.69 0.6 undecidable manual P 315 0.9758 102 -0.65 39
GU.ROTM.HHZ. 2022-05-21T00:36:15.32 0.6 undecidable manual S 245 0.1610 157 0.07 48
GU.TRAV.HHZ. 2022-05-21T00:36:15.93 1.0 positive manual P 316 0.8238 105 -0.37 21
GU.RNCA.HHZ. 2022-05-21T00:36:12.36 0.6 undecidable manual P 148 0.5270 119 -0.13 49
IV.MONC.HHE. 2022-05-21T00:36:12.54 0.1 undecidable manual P 289 0.4721 123 0.7 85
GU.PCP.HHZ. 2022-05-21T00:36:10.37 1.0 undecidable manual P 181 0.3768 131 -0.42 23
GU.ROTM.HHZ. 2022-05-21T00:36:08.98 0.1 negative manual P 245 0.1610 157 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.ROTM.HHN. ML:2.2 0.00033350000000000003 0.44 AML other m 2022-05-21T00:36:15.46
GU.ROTM.HHE. ML:2.0 0.00025550000000000003 0.44 AML other m 2022-05-21T00:36:16.57
GU.PCP.HHE. ML:1.3 0.00003875 0.62 AML other m 2022-05-21T00:36:17.50
GU.PCP.HHN. ML:1.2 0.00003095 0.78 AML other m 2022-05-21T00:36:17.88
GU.TRAV.HHE. ML:1.3 0.00001905 0.92 AML other m 2022-05-21T00:36:28.59
GU.TRAV.HHN. ML:1.4 0.000022850000000000003 1.32 AML other m 2022-05-21T00:36:29.77
GU.CIRO.HHE. ML:1.1 0.000010165 0.72 AML other m 2022-05-21T00:36:32.49
CH.MUGIO.HHN. ML:1.5 0.000020249999999999998 0.54 AML other m 2022-05-21T00:36:33.48
CH.MUGIO.HHE. ML:1.4 0.0000174 0.28 AML other m 2022-05-21T00:36:33.43
GU.CIRO.HHN. ML:1.1 0.000012105000000000002 0.52 AML other m 2022-05-21T00:36:35.98
IV.SNTG.HNE. ML:3.4 0.0001511 0.68 AML other m 2022-05-21T00:37:19.44
IV.SNTG.HNN. ML:3.5 0.0001815 0.62 AML other m 2022-05-21T00:37:56.85
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download