Earthquake with magnitude of ML 2.0 on date 30-09-2020 and time 22:18:20 (UTC) in region 3 km W Serravalle Scrivia (AL)

A magnitude ML 2.0 earthquake occured in region: 3 km W Serravalle Scrivia (AL), on

  • 30-09-2020 22:18:20 (UTC)
  • 01-10-2020 00:18:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.72, 8.82 at 24 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
Serravalle Scrivia AL 3 6128 6128
Stazzano AL 4 2486 8614
Gavi AL 4 4614 13228
Tassarolo AL 4 672 13900
Novi Ligure AL 5 28154 42054
Vignole Borbera AL 6 2182 44236
Arquata Scrivia AL 6 6409 50645
Cassano Spinola AL 6 1731 52376
San Cristoforo AL 7 608 52984
Carrosio AL 7 510 53494
Pasturana AL 7 1318 54812
Parodi Ligure AL 7 715 55527
Francavilla Bisio AL 8 531 56058
Sardigliano AL 8 406 56464
Gavazzana AL 8 180 56644
Bosio AL 8 1227 57871
Pozzolo Formigaro AL 9 4775 62646
Montaldeo AL 9 265 62911
Borghetto di Borbera AL 10 1966 64877
Castelletto d'Orba AL 10 2047 66924
Mornese AL 10 737 67661
Sant'Agata Fossili AL 11 425 68086
Basaluzzo AL 11 2087 70173
Capriata d'Orba AL 11 1904 72077
Voltaggio AL 11 738 72815
Villalvernia AL 11 955 73770
Grondona AL 11 510 74280
Carezzano AL 12 431 74711
Casaleggio Boiro AL 12 372 75083
Castellania AL 12 90 75173
Paderna AL 13 220 75393
Silvano d'Orba AL 13 1988 77381
Lerma AL 13 869 78250
Fresonara AL 13 731 78981
Isola del Cantone GE 13 1540 80521
Predosa AL 14 2048 82569
Spineto Scrivia AL 14 337 82906
Costa Vescovato AL 14 335 83241
Avolasca AL 15 294 83535
Fraconalto AL 15 336 83871
Rocca Grimalda AL 15 1512 85383
Carbonara Scrivia AL 15 1122 86505
Tagliolo Monferrato AL 15 1581 88086
Villaromagnano AL 16 715 88801
Garbagna AL 16 696 89497
Cerreto Grue AL 16 323 89820
Ronco Scrivia GE 16 4417 94237
Bosco Marengo AL 16 2457 96694
Belforte Monferrato AL 17 515 97209
Ovada AL 17 11477 108686
Roccaforte Ligure AL 17 136 108822
Montegioco AL 17 313 109135
Cantalupo Ligure AL 18 527 109662
Frugarolo AL 18 1968 111630
Carpeneto AL 18 977 112607
Sarezzano AL 18 1171 113778
Rocchetta Ligure AL 18 200 113978
Dernice AL 19 185 114163
Casasco AL 19 129 114292
Montaldo Bormida AL 19 664 114956
Busalla GE 19 5563 120519
Albera Ligure AL 20 325 120844
Montemarzino AL 20 341 121185
Tortona AL 20 27437 148622
Trisobbio AL 20 655 149277

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SE of Alessandria (93943 inhabitants)
35 Km N of Genova (586655 inhabitants)
53 Km E of Asti (76202 inhabitants)
53 Km NE of Savona (61345 inhabitants)
58 Km SW of Pavia (72576 inhabitants)
67 Km S of Vigevano (63310 inhabitants)
78 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)
95 Km E of Moncalieri (57294 inhabitants)
96 Km SW of Sesto San Giovanni (81608 inhabitants)
98 Km S of Legnano (60262 inhabitants)
98 Km SW of Cinisello Balsamo (75078 inhabitants)
98 Km E of Torino (890529 inhabitants)
100 Km S of Busto Arsizio (83106 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours)

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2014

Earthquakes since 1000 AD until 2014

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows 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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 2.0 2020-09-30
22:18:20
44.72 8.82 24 2020-09-30
22:29:37
Sala Sismica INGV-Roma 83397731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-30 22:18:20 ± 0.19
Latitude 44.72 ± 0.01
Longitude 8.82 ± 0.01
Depth (km) 24 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83397731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 990
Semi-minor axis of confidence ellipse (meter) 504
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 198
Circular confidence region, given by single value of horizontal uncertainty (meter) 990
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.09807
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 17
Magnitude information

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 83397731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-30 22:29:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IT.RMVT.HGZ. 2020-09-30T22:20:00.80 3.0 undecidable manual Sn -3.11 0
IV.SACS.HHZ. 2020-09-30T22:19:38.75 3.0 undecidable manual Sn -2.48 0
IV.LPEL.HHZ. 2020-09-30T22:19:34.58 3.0 undecidable manual Pn 3.94 0
IV.ARCI.HHZ. 2020-09-30T22:19:32.84 3.0 undecidable manual Sn -2.6 0
IV.COR1.EHZ. 2020-09-30T22:19:10.79 3.0 negative manual Pn 1.24 0
IV.MAGA.HHZ. 2020-09-30T22:19:10.37 3.0 undecidable manual Sn 0.01 0
CH.MMK.HHZ. 2020-09-30T22:19:04.54 3.0 undecidable manual Sn -0.36 0
GU.TRAV.HHZ. 2020-09-30T22:18:55.01 3.0 undecidable manual S -0.88 0
SI.LUSI.HHZ. 2020-09-30T22:18:52.47 3.0 negative manual Pn 0.24 0
ST.RONC.EHZ. 2020-09-30T22:18:50.43 3.0 positive manual Pn 0.34 0
IV.ZONE.HHZ. 2020-09-30T22:18:45.35 3.0 negative manual Pn 0.78 0
GU.SATI.HHZ. 2020-09-30T22:18:44.21 3.0 undecidable manual Pn 0.73 0
GU.LSD.HHZ. 2020-09-30T22:18:43.82 3.0 negative manual Pn -0.5 0
GU.CIRO.HHZ. 2020-09-30T22:18:41.06 3.0 positive manual P -1.17 0
GU.TRAV.HHZ. 2020-09-30T22:18:40.30 3.0 negative manual P 0.14 0
GU.RSP.HHZ. 2020-09-30T22:18:40.70 3.0 positive manual P -0.58 0
GU.BHB.HHZ. 2020-09-30T22:18:40.25 3.0 undecidable manual P -0.06 0
GU.EQUI.HHE. 2020-09-30T22:18:39.96 0.6 undecidable manual P 120 1.0981 97 -0.37 42
IV.IMI.HHZ. 2020-09-30T22:18:39.68 0.6 undecidable manual P 220 1.0477 97 0.2 44
GU.MGRO.HHZ. 2020-09-30T22:18:38.93 0.6 negative manual P 227 0.9929 98 0.39 43
IV.VARE.HHZ. 2020-09-30T22:18:38.03 3.0 positive manual P -3.01 0
GU.GRAM.HHE. 2020-09-30T22:18:37.71 0.6 undecidable manual P 104 0.9128 98 0.52 42
GU.GBOS.HHE. 2020-09-30T22:18:36.23 1.0 undecidable manual P 236 0.849 99 0.11 24
GU.RORO.HHZ. 2020-09-30T22:18:35.63 0.6 negative manual P 222 0.8139 100 0.12 48
GU.ROTM.HHZ. 2020-09-30T22:18:34.81 0.6 undecidable manual S 291 0.3588 114 0.94 39
IT.GNV.HGE. 2020-09-30T22:18:33.00 0.6 undecidable manual S 165 0.2986 120 0.72 46
GU.CANO.HHZ. 2020-09-30T22:18:32.99 0.1 positive manual P 219 0.6619 102 0.03 100
GU.RNCA.HHZ. 2020-09-30T22:18:31.91 0.6 undecidable manual S 160 0.2644 123 0.48 50
IT.ACQ.HGE. 2020-09-30T22:18:31.27 0.6 undecidable manual S 262 0.2599 124 -0.03 54
GU.PCP.HHZ. 2020-09-30T22:18:30.99 0.6 undecidable manual S 228 0.2671 123 -0.49 49
IV.QLNO.HHZ. 2020-09-30T22:18:30.46 0.3 negative manual P 221 0.5225 106 -0.18 75
IV.BOB.HHE. 2020-09-30T22:18:29.38 0.6 undecidable manual P 84 0.4452 109 -0.01 52
IV.SARZ.HHZ. 2020-09-30T22:18:29.51 0.6 undecidable manual S 23 0.1601 139 0.43 49
GU.ROTM.HHZ. 2020-09-30T22:18:28.21 0.3 undecidable manual P 291 0.3588 114 0.2 76
IT.GNV.HGE. 2020-09-30T22:18:27.16 0.6 undecidable manual P 165 0.2986 120 0.06 54
GU.GENL.EHE. 2020-09-30T22:18:27.79 0.6 undecidable manual P 162 0.331 117 0.2 52
GU.GORR.HHZ. 2020-09-30T22:18:27.86 0.3 positive manual P 109 0.3516 115 -0.04 80
IT.ACQ.HGE. 2020-09-30T22:18:26.08 0.3 undecidable manual P 262 0.2599 124 -0.45 75
GU.PCP.HHZ. 2020-09-30T22:18:26.17 0.1 positive manual P 228 0.2671 123 -0.46 99
GU.RNCA.HHZ. 2020-09-30T22:18:26.36 0.3 positive manual P 160 0.2644 123 -0.24 78
IV.SARZ.HHZ. 2020-09-30T22:18:24.66 0.3 undecidable manual P 23 0.1601 139 -0.59 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SARZ.HHE. ML:2.2 0.00094225915 0.2944 AML other m 2020-09-30T22:18:33.02
IV.SARZ.HHN. ML:2.3 0.00101151355 0.3584 AML other m 2020-09-30T22:18:32.58
IV.SARZ.HNE. ML:2.2 0.00092475645 0.2816 AML other m 2020-09-30T22:18:33.02
IV.SARZ.HNN. ML:2.3 0.00097881565 0.3584 AML other m 2020-09-30T22:18:32.58
GU.PCP.HHE. ML:1.9 0.0002787558 0.3584 AML other m 2020-09-30T22:18:31.26
GU.PCP.HHN. ML:1.8 0.00023109075 0.1664 AML other m 2020-09-30T22:18:31.24
GU.RNCA.HHE. ML:1.8 0.00024836495 0.3072 AML other m 2020-09-30T22:18:33.02
GU.RNCA.HHN. ML:1.8 0.0002322427 0.3456 AML other m 2020-09-30T22:18:32.46
GU.GORR.HHE. ML:1.7 0.00014347575 0.4736 AML other m 2020-09-30T22:18:37.30
GU.GORR.HHN. ML:1.6 0.00012867075 0.2048 AML other m 2020-09-30T22:18:35.83
GU.ROTM.HHE. ML:2.1 0.00037393275 0.2688 AML other m 2020-09-30T22:18:38.30
GU.ROTM.HHN. ML:2.2 0.0004413571 0.32 AML other m 2020-09-30T22:18:41.93
IV.QLNO.HHE. ML:1.4 5.512236E-5 0.1664 AML other m 2020-09-30T22:18:40.16
IV.QLNO.HHN. ML:1.5 6.4276215E-5 0.2048 AML other m 2020-09-30T22:18:39.42
GU.CANO.HHE. ML:2.2 0.00020725755 0.2688 AML other m 2020-09-30T22:18:45.72
GU.CANO.HHN. ML:2.1 0.0001696599 0.32 AML other m 2020-09-30T22:18:45.20
GU.RORO.HHE. ML:2.6 0.00040447795 0.7296 AML other m 2020-09-30T22:18:58.85
GU.RORO.HHN. ML:1.6 4.7167155E-5 0.3584 AML other m 2020-09-30T22:18:51.62
GU.MGRO.HNE. ML:1.9 7.048681E-5 1.3312 AML other m 2020-09-30T22:19:05.67
GU.MGRO.HNN. ML:1.9 5.8029615E-5 0.512 AML other m 2020-09-30T22:18:58.11
GU.MGRO.HHE. ML:1.9 6.579604E-5 0.6784 AML other m 2020-09-30T22:18:56.61
GU.MGRO.HHN. ML:1.8 4.999898E-5 0.4864 AML other m 2020-09-30T22:18:58.35
GU.BHB.HHE. ML:1.7 3.6593075E-5 0.4224 AML other m 2020-09-30T22:19:00.12
GU.BHB.HHN. ML:1.5 1.959187E-5 0.3584 AML other m 2020-09-30T22:19:05.57
GU.TRAV.HHE. ML:2 7.2321475E-5 0.1536 AML other m 2020-09-30T22:18:57.22
GU.TRAV.HHN. ML:2.1 9.018732E-5 0.128 AML other m 2020-09-30T22:18:57.64
GU.RSP.HNE. ML:1.8 3.9975955E-5 0.6784 AML other m 2020-09-30T22:19:13.31
GU.RSP.HHE. ML:1.5 1.797691E-5 0.2304 AML other m 2020-09-30T22:19:04.14
GU.RSP.HHN. ML:1.5 1.7537875E-5 0.1152 AML other m 2020-09-30T22:18:58.62
GU.CIRO.HHE. ML:1.7 2.994471E-5 0.1024 AML other m 2020-09-30T22:19:00.42
GU.CIRO.HHN. ML:1.9 4.9005255E-5 0.1152 AML other m 2020-09-30T22:19:00.58
GU.LSD.HHE. ML:1.5 1.5415409E-5 0.1792 AML other m 2020-09-30T22:19:05.78
GU.LSD.HHN. ML:1.5 1.3266568E-5 0.2176 AML other m 2020-09-30T22:19:07.71
GU.SATI.HHE. ML:2.1 7.2417865E-5 0.1152 AML other m 2020-09-30T22:19:02.71
GU.SATI.HHN. ML:1.9 4.1932575E-5 0.2048 AML other m 2020-09-30T22:19:03.24
IV.ZONE.HHE. ML:2.1 6.3458285E-5 0.3072 AML other m 2020-09-30T22:19:07.73
IV.ZONE.HHN. ML:2 4.741895E-5 0.2816 AML other m 2020-09-30T22:19:07.29
IV.ZONE.HNE. ML:2.4 0.000109858015 0.8576 AML other m 2020-09-30T22:19:08.80
ST.RONC.EHE. ML:2.3 6.4006282E-5 0.2432 AML other m 2020-09-30T22:19:19.16
ST.RONC.EHN. ML:2.3 6.677524E-5 0.1792 AML other m 2020-09-30T22:19:18.63
ST.RONC.HNN. ML:3 0.00034136235 1.4592 AML other m 2020-09-30T22:19:13.22
SI.LUSI.HHE. ML:2.1 2.981599E-5 0.1792 AML other m 2020-09-30T22:19:24.68
SI.LUSI.HHN. ML:2.3 5.152646E-5 0.1664 AML other m 2020-09-30T22:19:24.62
IV.COR1.EHN. ML:2.6 2.815036E-5 0.0768 AML other m 2020-09-30T22:19:15.35
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol 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
Waveforms Seismic signals in full SEED format Download