Earthquake with magnitude of Md 4.8 on date 21-08-2000 and time 19:14:28 (Italy) in region 2 km W Quattordio (AL)

A magnitude Md 4.8 earthquake occured in region: 2 km W Quattordio (AL), on

  • 21-08-2000 17:14:28 (UTC)
  • 21-08-2000 19:14:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.9080, 8.3880 at 5 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
Quattordio AL 2 1637 1637
Felizzano AL 4 2344 3981
Cerro Tanaro AT 4 626 4607
Masio AL 5 1420 6027
Refrancore AT 5 1591 7618
Rocchetta Tanaro AT 6 1450 9068
Castello di Annone AT 7 1860 10928
Fubine AL 7 1653 12581
Viarigi AT 9 929 13510
Rocca d'Arazzo AT 9 936 14446
Castagnole Monferrato AT 9 1245 15691
Quargnento AL 9 1398 17089
Oviglio AL 10 1265 18354
Belveglio AT 10 350 18704
Cortiglione AT 10 571 19275
Solero AL 10 1645 20920
Altavilla Monferrato AL 10 468 21388
Montemagno AT 10 1153 22541
Azzano d'Asti AT 10 391 22932
Bergamasco AL 10 744 23676
Scurzolengo AT 11 555 24231
Cuccaro Monferrato AL 11 340 24571
Carentino AL 11 340 24911
Incisa Scapaccino AT 11 2288 27199
Portacomaro AT 12 2006 29205
Vignale Monferrato AL 12 1006 30211
Castelnuovo Belbo AT 12 895 31106
Grana AT 12 600 31706
Mombercelli AT 12 2259 33965
Vinchio AT 12 601 34566
Camagna Monferrato AL 13 528 35094
Vaglio Serra AT 13 275 35369
Lu AL 13 1122 36491
Montaldo Scarampi AT 13 755 37246
Casorzo AT 14 633 37879
Bruno AT 14 321 38200
Conzano AL 14 979 39179
Frassinello Monferrato AL 14 502 39681
Asti AT 14 76202 115883
Borgoratto Alessandrino AL 14 584 116467
Frascaro AL 15 440 116907
Olivola AL 15 122 117029
Vigliano d'Asti AT 15 835 117864
Mongardino AT 15 921 118785
Montegrosso d'Asti AT 15 2344 121129
Calliano AT 15 1317 122446
Nizza Monferrato AT 15 10429 132875
Castelnuovo Calcea AT 15 759 133634
Grazzano Badoglio AT 16 615 134249
Mombaruzzo AT 16 1117 135366
Castelletto Monferrato AL 16 1537 136903
Castell'Alfero AT 16 2763 139666
Gamalero AL 16 844 140510
Castellazzo Bormida AL 17 4570 145080
Ottiglio AL 17 629 145709
Agliano Terme AT 17 1642 147351
San Salvatore Monferrato AL 17 4299 151650
Fontanile AT 17 567 152217
Penango AT 18 488 152705
Castelletto Molina AT 18 180 152885
Maranzana AT 18 277 153162
Mirabello Monferrato AL 18 1374 154536
Alessandria AL 18 93943 248479
Quaranti AT 18 183 248662
Moasca AT 18 494 249156
San Marzano Oliveto AT 19 1047 250203
Isola d'Asti AT 19 2071 252274
Cella Monte AL 19 495 252769
Revigliasco d'Asti AT 19 767 253536
Moncalvo AT 19 3033 256569
Sala Monferrato AL 19 352 256921
Rosignano Monferrato AL 19 1568 258489
Castelspina AL 19 416 258905
Calamandrana AT 19 1761 260666
Occimiano AL 20 1319 261985
Frinco AT 20 768 262753
Sezzadio AL 20 1246 263999
Terruggia AL 20 936 264935

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km E of Asti (76202 inhabitants)
18 Km W of Alessandria (93943 inhabitants)
56 Km E of Moncalieri (57294 inhabitants)
59 Km E of Torino (890529 inhabitants)
59 Km SW of Vigevano (63310 inhabitants)
63 Km SW of Novara (104380 inhabitants)
67 Km N of Savona (61345 inhabitants)
68 Km W of Pavia (72576 inhabitants)
70 Km NW of Genova (586655 inhabitants)
86 Km SW of Rho (50434 inhabitants)
87 Km SW of Busto Arsizio (83106 inhabitants)
87 Km SW of Legnano (60262 inhabitants)
87 Km NE of Cuneo (56081 inhabitants)
89 Km SW of Milano (1345851 inhabitants)
90 Km SW of Gallarate (53343 inhabitants)
96 Km SW of Sesto San Giovanni (81608 inhabitants)
97 Km SW of Cinisello Balsamo (75078 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
Bulletin
Rev1000
Md 4.8
ML-VAX 4.3
2000-08-21
17:14:28
44.908 8.388 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 401349
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2000-08-21 17:14:28 ± 0.229
Latitude 44.9080 ± 0.0150
Longitude 8.3880 ± 0.0273
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 401349

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 2722.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 57
Number of defining phases 57
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00437
Epicentral distance of station farthest from the epicenter (degree) 0.07156
Number of stations at which the event was observed 45
Number of stations from which data was used for origin computation 45
Magnitudes information

Md:4.8

Field Value
Value 4.8
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 401349
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 23:17:31

ML:4.3

Field Value
Value 4.3
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 401349
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RGNG.Z. 2000-08-21T17:17:07.65 10.0 undecidable manual SN 119 0.0554 1.27 0.1
--.SA1.Z. 2000-08-21T17:16:25.61 10.0 undecidable manual PN 140 0.0716 1.27 0.3
--.ERC.Z. 2000-08-21T17:16:20.32 10.0 undecidable manual PN 153 0.0679 1.54 0.2
--.MNS.Z. 2000-08-21T17:16:16.42 10.0 undecidable manual SN 127 0.0359 1.23 0.2
--.USI.Z. 2000-08-21T17:16:14.15 10.0 undecidable manual PN 148 0.0644 0.91 0.5
--.MGR.Z. 2000-08-21T17:16:14.41 10.0 positive manual PN 129 0.0639 1.68 0.3
--.SL9.Z. 2000-08-21T17:16:12.96 10.0 undecidable manual PN! 127 0.0628 2.03 0
--.PTCC.Z. 2000-08-21T17:16:10.36 10.0 undecidable manual SN 64 0.0340 0.45 0.4
--.GE9.Z. 2000-08-21T17:16:08.36 10.0 undecidable manual SN! 65 0.0323 2.82 0
--.MU9.Z. 2000-08-21T17:16:08.84 10.0 undecidable manual PN! 126 0.0598 2.43 0
--.SGO.Z. 2000-08-21T17:16:07.63 10.0 negative manual PN 128 0.0601 0.77 1.2
--.CI9.Z. 2000-08-21T17:16:02.98 10.0 undecidable manual PN 127 0.0568 1.11 0.4
--.FG5.Z. 2000-08-21T17:15:59.88 10.0 undecidable manual PN 123 0.0557 -0.2 0.9
--.RGNG.Z. 2000-08-21T17:15:58.22 10.0 positive manual PN 119 0.0554 -1.33 0.6
--.PSB1.Z. 2000-08-21T17:15:58.98 10.0 undecidable manual PN! 125 0.0536 2.05 0
--.VTB1.Z. 2000-08-21T17:15:57.19 10.0 undecidable manual PN 127 0.0529 1.31 0.3
--.RFI.Z. 2000-08-21T17:15:52.28 10.0 undecidable manual PN! 129 0.0490 2.41 0
--.CRVI.Z. 2000-08-21T17:15:51.22 10.0 undecidable manual PN! 124 0.0482 2.66 0
--.SDI.Z. 2000-08-21T17:15:45.54 10.0 negative manual PN 127 0.0457 0.77 1.5
--.SFI.Z. 2000-08-21T17:15:44.60 10.0 undecidable manual SN 110 0.0240 0.57 0.4
--.CSNT.Z. 2000-08-21T17:15:42.25 10.0 undecidable manual SN! 123 0.0227 2.07 0
--.BS9.Z. 2000-08-21T17:15:42.97 10.0 undecidable manual SN 102 0.0242 -1.25 0.2
--.CTI.Z. 2000-08-21T17:15:41.63 10.0 undecidable manual SN 62 0.0230 0.8 0.3
--.PQ9.Z. 2000-08-21T17:15:40.00 10.0 negative manual PN 126 0.0418 1.2 0.9
--.AQU.Z. 2000-08-21T17:15:37.21 10.0 undecidable manual PN 123 0.0399 1.24 0.4
--.MA9.Z. 2000-08-21T17:15:35.58 10.0 undecidable manual PN 133 0.0397 -0.09 1.1
--.MNS.Z. 2000-08-21T17:15:29.77 10.0 negative manual PN 127 0.0359 -0.22 2.3
--.NRCA.Z. 2000-08-21T17:15:28.74 10.0 negative manual PN 119 0.0359 -1.07 1.2
--.TRI.Z. 2000-08-21T17:15:27.24 10.0 negative manual PN 76 0.0347 -0.87 1.5
--.PTCC.Z. 2000-08-21T17:15:26.69 10.0 positive manual PN 64 0.0340 -0.25 2.4
--.GE9.Z. 2000-08-21T17:15:24.51 10.0 positive manual PN 65 0.0323 0.09 2.5
--.SNTG.Z. 2000-08-21T17:15:24.62 10.0 negative manual PN 115 0.0329 -0.74 1.8
--.ASS.Z. 2000-08-21T17:15:23.14 10.0 positive manual PN 119 0.0321 -1.07 1.3
--.FVI.Z. 2000-08-21T17:15:23.89 10.0 positive manual PN 59 0.0314 0.81 1.7
--.ARV.Z. 2000-08-21T17:15:23.62 10.0 positive manual PN 111 0.0320 -0.27 2.4
--.FB9.Z. 2000-08-21T17:15:21.86 10.0 positive manual PN 109 0.0303 0.56 2.1
--.BS9.Z. 2000-08-21T17:15:14.43 10.0 undecidable manual PN! 102 0.0242 2.32 0
--.SFI.Z. 2000-08-21T17:15:11.29 10.0 positive manual PN 110 0.0240 -0.4 2.3
--.CTI.Z. 2000-08-21T17:15:10.16 10.0 positive manual PN 62 0.0230 0 2.5
--.GRFL.Z. 2000-08-21T17:15:10.45 10.0 undecidable manual PN 132 0.0230 0.22 1.2
--.PGD.Z. 2000-08-21T17:15:09.69 10.0 undecidable manual PN 112 0.0233 -1.02 0.7
--.CSNT.Z. 2000-08-21T17:15:08.63 10.0 positive manual PN 123 0.0227 -1.15 1.1
--.BNI.Z. 2000-08-21T17:15:07.70 10.0 undecidable manual SN 277 0.0109 -1.32 0.2
--.ZC9.Z. 2000-08-21T17:15:04.30 10.0 positive manual PN! 105 0.0172 2.8 0
--.MCGN.Z. 2000-08-21T17:15:04.11 10.0 undecidable manual SN 345 0.0097 -1.8 0.1
--.BR9.Z. 2000-08-21T17:15:04.57 10.0 positive manual PN 40 0.0188 0.76 1.8
--.VAI.Z. 2000-08-21T17:15:03.42 10.0 undecidable manual SG 15 0.0089 0.34 0.5
--.PII.Z. 2000-08-21T17:14:59.86 10.0 positive manual PN 126 0.0174 -1.78 0.4
--.GU9.Z. 2000-08-21T17:14:58.56 10.0 positive manual PN 108 0.0149 0.67 1.9
--.SAL.Z. 2000-08-21T17:14:57.87 10.0 positive manual PN 64 0.0149 0.01 2.5
--.EB9.Z. 2000-08-21T17:14:55.98 10.0 positive manual PN 107 0.0137 0.02 2.5
--.BNI.Z. 2000-08-21T17:14:51.38 10.0 positive manual PN 277 0.0109 -0.41 2.3
--.MCGN.Z. 2000-08-21T17:14:50.16 10.0 positive manual PN 345 0.0097 0.16 2.5
--.VAI.Z. 2000-08-21T17:14:48.93 10.0 positive manual PG 15 0.0089 0.57 2.1
--.CKI.Z. 2000-08-21T17:14:46.29 10.0 undecidable manual SG 188 0.0044 -0.68 0.4
--.BOB.Z. 2000-08-21T17:14:42.49 10.0 positive manual PG 100 0.0068 -1.59 0.5
--.CKI.Z. 2000-08-21T17:14:36.32 10.0 positive manual PG! 188 0.0044 -2.74 0
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