INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.0 on date 20-02-2019 and time 11:18:35 (Italy) in region 4 km E Murialdo (SV)

A magnitude ML 1.0 earthquake occured in region: 4 km E Murialdo (SV), on

  • 20-02-2019 10:18:35 (UTC)
  • 20-02-2019 11:18:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.33, 8.21 at 10 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
Murialdo SV 4 841 841
Roccavignale SV 4 752 1593
Millesimo SV 4 3383 4976
Plodio SV 4 650 5626
Cosseria SV 5 1105 6731
Osiglia SV 5 444 7175
Pallare SV 6 923 8098
Bormida SV 6 387 8485
Cengio SV 7 3563 12048
Castelnuovo di Ceva CN 7 110 12158
Carcare SV 8 5587 17745
Montezemolo CN 8 259 18004
Mallare SV 8 1146 19150
Cairo Montenotte SV 10 13269 32419
Perlo CN 10 116 32535
Saliceto CN 10 1323 33858
Priero CN 11 529 34387
Altare SV 11 2108 36495
Massimino SV 11 113 36608
Nucetto CN 12 430 37038
Camerana CN 12 631 37669
Sale delle Langhe CN 12 486 38155
Calizzano SV 13 1475 39630
Sale San Giovanni CN 13 183 39813
Rialto SV 13 564 40377
Bagnasco CN 13 1035 41412
Ceva CN 15 5782 47194
Gottasecca CN 15 148 47342
Orco Feglino SV 15 890 48232
Calice Ligure SV 15 1730 49962
Magliolo SV 16 974 50936
Battifollo CN 16 219 51155
Paroldo CN 16 211 51366
Dego SV 16 1985 53351
Bardineto SV 16 756 54107
Vezzi Portio SV 17 809 54916
Quiliano SV 17 7232 62148
Monesiglio CN 17 645 62793
Priola CN 17 701 63494
Scagnello CN 18 194 63688
Tovo San Giacomo SV 18 2582 66270
Giustenice SV 18 977 67247
Roascio CN 18 97 67344
Torresina CN 18 52 67396
Lisio CN 18 201 67597
Mombarcaro CN 18 268 67865
Castelletto Uzzone CN 18 331 68196
Prunetto CN 19 451 68647
Mombasiglio CN 19 609 69256
Piana Crixia SV 19 788 70044
Vado Ligure SV 19 8336 78380
Viola CN 20 391 78771

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km W of Savona (61345 inhabitants)
53 Km E of Cuneo (56081 inhabitants)
59 Km W of Genova (586655 inhabitants)
64 Km S of Asti (76202 inhabitants)
66 Km NE of Sanremo (54807 inhabitants)
73 Km SW of Alessandria (93943 inhabitants)
85 Km SE of Moncalieri (57294 inhabitants)
93 Km SE of Torino (890529 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 1.0 2019-02-20
10:18:35
44.33 8.21 10 2019-02-20
10:26:27
Sala Sismica INGV-Roma 65728771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-02-20 10:18:35 ± 0.21
Latitude 44.33 ± 0.01
Longitude 8.21 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 65728771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1360
Semi-minor axis of confidence ellipse (meter) 1180
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 332
Circular confidence region, given by single value of horizontal uncertainty (meter) 1360
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 192
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 8
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
Epicentral distance of station farthest from the epicenter (degree) 0.57197
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 65728771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-02-20 10:26:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GENL.EHZ. 2019-02-20T10:18:55.27 0.6 undecidable manual S -0.13 0.74
GU.ENR.HHZ. 2019-02-20T10:18:47.52 0.6 negative manual P 260 0.572 50 0.49 42
GU.RORO.HHZ. 2019-02-20T10:18:44.91 0.6 undecidable manual S 205 0.2383 50 -0.55 44
GU.PCP.HHZ. 2019-02-20T10:18:42.45 3.0 positive manual P 0.28 0
GU.GBOS.HHZ. 2019-02-20T10:18:41.83 0.6 undecidable manual P 252 0.277 50 -0.15 48
GU.CANO.HHZ. 2019-02-20T10:18:41.78 0.3 undecidable manual S 170 0.1232 126 0.23 73
GU.RORO.HHZ. 2019-02-20T10:18:41.28 0.6 positive manual P 205 0.2383 50 -0.04 49
GU.CANO.HHZ. 2019-02-20T10:18:39.16 0.1 positive manual P 170 0.1232 126 0.09 100
IV.QLNO.HHZ. 2019-02-20T10:18:38.54 0.1 undecidable manual P 92 0.0989 132 -0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.CANO.HHN. ML:1.2 0.000165 1.76 AML other m 2019-02-20T10:18:41.03
IV.QLNO.HHN. ML:1 0.000135 0.94 AML other m 2019-02-20T10:18:41.94
IV.QLNO.HHE. ML:1.1 0.000139 0.84 AML other m 2019-02-20T10:18:42.46
GU.CANO.HHE. ML:1.1 0.0001185 0.74 AML other m 2019-02-20T10:18:42.82
GU.RORO.HHE. ML:0.7 3.06E-5 0.84 AML other m 2019-02-20T10:18:45.08
GU.RORO.HHN. ML:0.9 4.3E-5 0.16 AML other m 2019-02-20T10:18:45.43
IV.GENL.EHE. ML:1.9 0.0001535 0.26 AML other m 2019-02-20T10:18:58.90
IV.GENL.EHN. ML:1.9 0.0001465 1.46 AML other m 2019-02-20T10:18:59.00
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