Earthquake with magnitude of ML 1.4 on date 11-03-2020 and time 20:33:24 (Italy) in region 1 km W Castelletto d'Erro (AL)

A magnitude ML 1.4 earthquake occured in region: 1 km W Castelletto d'Erro (AL), on

  • 11-03-2020 19:33:24 (UTC)
  • 11-03-2020 20:33:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.63, 8.39 at 11 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
Castelletto d'Erro AL 1 148 148
Ponti AL 2 606 754
Montechiaro d'Acqui AL 3 560 1314
Melazzo AL 4 1325 2639
Bistagno AL 4 1887 4526
Cartosio AL 5 747 5273
Denice AL 5 176 5449
Monastero Bormida AT 5 931 6380
Cavatore AL 5 291 6671
Terzo AL 6 923 7594
Sessame AT 6 271 7865
Ponzone AL 7 1051 8916
Mombaldone AT 8 209 9125
Malvicino AL 8 85 9210
Montabone AT 8 333 9543
Bubbio AT 8 893 10436
Grognardo AL 9 259 10695
Acqui Terme AL 9 19896 30591
Cassinasco AT 10 611 31202
Rocchetta Palafea AT 10 338 31540
Roccaverano AT 10 399 31939
Spigno Monferrato AL 10 1050 32989
Visone AL 10 1194 34183
Morbello AL 10 402 34585
Castel Boglione AT 11 609 35194
Castel Rocchero AT 11 395 35589
Loazzolo AT 11 359 35948
San Giorgio Scarampi AT 11 122 36070
Cessole AT 12 403 36473
Olmo Gentile AT 12 80 36553
Pareto AL 12 554 37107
Alice Bel Colle AL 12 766 37873
Vesime AT 13 622 38495
Serole AT 13 123 38618
Calamandrana AT 13 1761 40379
Canelli AT 13 10485 50864
Prasco AL 13 521 51385
Ricaldone AL 14 684 52069
Strevi AL 14 2019 54088
Morsasco AL 14 679 54767
Perletto CN 14 292 55059
Merana AL 14 189 55248
Cassinelle AL 14 914 56162
Castelletto Molina AT 14 180 56342
Fontanile AT 15 567 56909
Quaranti AT 15 183 57092
Santo Stefano Belbo CN 15 3984 61076
Mioglia SV 15 526 61602
Cossano Belbo CN 16 958 62560
Orsara Bormida AL 16 424 62984
San Marzano Oliveto AT 16 1047 64031
Cremolino AL 16 1086 65117
Cortemilia CN 16 2331 67448
Castino CN 16 483 67931
Rivalta Bormida AL 16 1446 69377
Trisobbio AL 17 655 70032
Rocchetta Belbo CN 17 167 70199
Maranzana AT 17 277 70476
Nizza Monferrato AT 17 10429 80905
Piana Crixia SV 17 788 81693
Camo CN 17 201 81894
Mombaruzzo AT 17 1117 83011
Molare AL 17 2181 85192
Montaldo Bormida AL 17 664 85856
Moasca AT 17 494 86350
Cassine AL 18 2961 89311
Calosso AT 18 1279 90590
Pezzolo Valle Uzzone CN 18 344 90934
Bergolo CN 18 71 91005
Sassello SV 18 1777 92782
Castelnuovo Bormida AL 18 694 93476
Carpeneto AL 19 977 94453
Bruno AT 19 321 94774
Bosia CN 19 177 94951
Castiglione Tinella CN 19 895 95846
Vaglio Serra AT 19 275 96121
Torre Bormida CN 19 200 96321
Giusvalla SV 20 441 96762
Mango CN 20 1308 98070
Castelnuovo Calcea AT 20 759 98829
Castelnuovo Belbo AT 20 895 99724

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SE of Asti (76202 inhabitants)
36 Km N of Savona (61345 inhabitants)
37 Km SW of Alessandria (93943 inhabitants)
50 Km W of Genova (586655 inhabitants)
69 Km SE of Moncalieri (57294 inhabitants)
71 Km E of Cuneo (56081 inhabitants)
75 Km SE of Torino (890529 inhabitants)
86 Km SW of Vigevano (63310 inhabitants)
87 Km SW of Pavia (72576 inhabitants)
93 Km S of Novara (104380 inhabitants)
Recent and historical Seismicity
Seismic hazard
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
Rev 100 ML 1.4 2020-03-11
19:33:24
44.63 8.39 11 2020-03-11
19:36:26
Sala Sismica INGV-Roma 77199321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-11 19:33:24 ± 0.06
Latitude 44.63 ± 0.00
Longitude 8.39 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77199321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 870
Semi-minor axis of confidence ellipse (meter) 350
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 88
Circular confidence region, given by single value of horizontal uncertainty (meter) 870
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 114
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.7968
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 77199321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-11 19:36:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.BLANC.HHZ. 2020-03-11T19:33:54.21 3.0 undecidable manual Pg 2.87 0
GU.ENR.HHZ. 2020-03-11T19:33:50.14 0.6 undecidable manual S 240 0.7968 50 -0.17 42
GU.GBOS.HHZ. 2020-03-11T19:33:42.81 0.6 undecidable manual S 226 0.5468 50 -0.12 45
GU.ENR.HHZ. 2020-03-11T19:33:39.64 0.6 undecidable manual P 240 0.7968 50 0.36 40
GU.CANO.HHZ. 2020-03-11T19:33:39.50 0.6 undecidable manual S 194 0.4317 50 0 47
GU.GBOS.HHZ. 2020-03-11T19:33:35.01 0.6 undecidable manual P 226 0.5468 50 -0.01 46
IV.QLNO.HHZ. 2020-03-11T19:33:35.78 0.6 undecidable manual S 185 0.3031 50 0.09 47
GU.CANO.HHZ. 2020-03-11T19:33:33.23 1.0 undecidable manual P 194 0.4317 50 0.18 23
GU.ROTM.HHZ. 2020-03-11T19:33:33.61 0.6 undecidable manual S 354 0.2239 50 0.25 46
IV.QLNO.HHZ. 2020-03-11T19:33:30.92 0.1 undecidable manual P 185 0.3031 50 0.08 95
GU.PCP.HHZ. 2020-03-11T19:33:30.86 0.6 undecidable manual S 127 0.1412 125 0.01 50
GU.ROTM.HHZ. 2020-03-11T19:33:29.23 0.1 negative manual P 354 0.2239 50 -0.27 92
IT.ACQ.HGZ. 2020-03-11T19:33:29.28 0.6 undecidable manual S 44 0.0782 141 0.22 48
GU.PCP.HHZ. 2020-03-11T19:33:27.89 0.1 positive manual P 127 0.1412 125 -0.16 96
IT.ACQ.HGZ. 2020-03-11T19:33:26.99 0.1 undecidable manual P 44 0.0782 141 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PCP.HHE. ML:1.5 0.0003115 0.36 AML other m 2020-03-11T19:33:31.07
GU.PCP.HHN. ML:1.4 0.000242 0.1 AML other m 2020-03-11T19:33:31.29
GU.ENR.HHE. ML:1.4 2.81E-5 0.52 AML other m 2020-03-11T19:33:55.39
GU.ENR.HHN. ML:1.4 2.855E-5 0.44 AML other m 2020-03-11T19:33:57.74
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download