Earthquake with magnitude of ML 2.1 on date 15-02-2021 and time 18:00:46 (UTC) in region 6 km SE Fabbrica Curone (AL)

A magnitude ML 2.1 earthquake occured in region: 6 km SE Fabbrica Curone (AL), on

  • 15-02-2021 18:00:46 (UTC)
  • 15-02-2021 19:00:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.7, 9.18 at 9 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
Fabbrica Curone AL 6 656 656
Cabella Ligure AL 7 528 1184
Albera Ligure AL 9 325 1509
Brallo di Pregola PV 9 599 2108
Santa Margherita di Staffora PV 9 473 2581
Carrega Ligure AL 9 84 2665
Zerba PC 9 77 2742
Montacuto AL 9 278 3020
Rocchetta Ligure AL 10 200 3220
Cantalupo Ligure AL 11 527 3747
Mongiardino Ligure AL 12 165 3912
Gremiasco AL 12 324 4236
Roccaforte Ligure AL 12 136 4372
Dernice AL 13 185 4557
San Sebastiano Curone AL 13 583 5140
Menconico PV 13 360 5500
Varzi PV 14 3279 8779
Cerignale PC 14 127 8906
Gorreto GE 14 97 9003
Bagnaria PV 15 658 9661
Ottone PC 15 516 10177
Propata GE 15 142 10319
Rondanina GE 16 62 10381
Corte Brugnatella PC 16 586 10967
Fascia GE 16 81 11048
Rovegno GE 16 554 11602
Vobbia GE 16 409 12011
Brignano-Frascata AL 17 456 12467
Garbagna AL 17 696 13163
Grondona AL 17 510 13673
Bobbio PC 18 3577 17250
Ponte Nizza PV 18 807 18057
Crocefieschi GE 18 548 18605
Cecima PV 18 236 18841
Valbrevenna GE 19 798 19639
Valverde PV 19 287 19926
Isola del Cantone GE 19 1540 21466
Borghetto di Borbera AL 19 1966 23432
Coli PC 19 879 24311
Romagnese PV 19 687 24998
Momperone AL 19 223 25221
Fontanigorda GE 20 277 25498
Casasco AL 20 129 25627
Zavattarello PV 20 991 26618
Val di Nizza PV 20 624 27242

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km NE of Genova (586655 inhabitants)
51 Km E of Alessandria (93943 inhabitants)
54 Km S of Pavia (72576 inhabitants)
56 Km SW of Piacenza (102191 inhabitants)
71 Km NE of Savona (61345 inhabitants)
73 Km SE of Vigevano (63310 inhabitants)
80 Km E of Asti (76202 inhabitants)
82 Km SW of Cremona (71901 inhabitants)
84 Km NW of La Spezia (93959 inhabitants)
85 Km S of Milano (1345851 inhabitants)
91 Km W of Parma (192836 inhabitants)
93 Km S of Sesto San Giovanni (81608 inhabitants)
93 Km S of Rho (50434 inhabitants)
94 Km SE of Novara (104380 inhabitants)
95 Km S of Cinisello Balsamo (75078 inhabitants)
99 Km S of Monza (122671 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 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. 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 in the 90 days preceding the time of the current earthquake occurrence, 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 2.1 2021-02-15
18:00:46
44.7 9.18 9 2021-02-15
18:08:30
Sala Sismica INGV-Roma 87184611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-15 18:00:46 ± 0.13
Latitude 44.70 ± 0.01
Longitude 9.18 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87184611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 763
Semi-minor axis of confidence ellipse (meter) 709
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 134
Circular confidence region, given by single value of horizontal uncertainty (meter) 760
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 10
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) 0.45326
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 6
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 87184611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-15 18:08:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.PLMA.HHZ. 2021-02-15T18:01:16.61 3.0 undecidable manual S 0
GU.CANO.HHZ. 2021-02-15T18:01:15.13 3.0 undecidable manual S 0
IV.VARE.HHZ. 2021-02-15T18:01:05.01 3.0 negative manual P 2.05 0
GU.PLMA.HHZ. 2021-02-15T18:01:05.66 3.0 undecidable manual P 0
IV.MSSA.HHZ. 2021-02-15T18:01:03.20 0.1 undecidable manual S 148 0.4533 50 0.42 86
GU.CANO.HHZ. 2021-02-15T18:01:03.40 3.0 undecidable manual P 0
IT.GNV.HGE. 2021-02-15T18:00:58.90 0.1 undecidable manual S 213 0.3238 50 -0.03 96
IV.MSSA.HHZ. 2021-02-15T18:00:55.37 0.1 undecidable manual P 148 0.4533 50 -0.47 85
IV.BOB.HHZ. 2021-02-15T18:00:54.60 0.1 undecidable manual S 71 0.1996 112 -0.05 97
IT.GNV.HGE. 2021-02-15T18:00:53.63 0.1 undecidable manual P 213 0.3238 50 0.01 96
IV.EUCT.HNZ. 2021-02-15T18:00:52.03 3.0 negative manual P -0.14 0
GU.GORR.HHZ. 2021-02-15T18:00:52.20 0.1 undecidable manual S 140 0.1232 123 0.19 96
GU.RNCA.HHE. 2021-02-15T18:00:52.65 0.1 undecidable manual P 216 0.2833 106 -0.26 92
IV.SARZ.HHE. 2021-02-15T18:00:52.59 0.1 undecidable manual P 311 0.2518 107 0.34 91
IV.BOB.HHZ. 2021-02-15T18:00:51.03 0.1 undecidable manual P 71 0.1996 112 -0.12 96
GU.GORR.HHZ. 2021-02-15T18:00:49.63 0.1 positive manual P 140 0.1232 123 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GORR.HHN. ML:2.4 0.00275 0.22 AML other m 2021-02-15T18:00:52.44
GU.GORR.HHE. ML:2.3 0.00226 0.88 AML other m 2021-02-15T18:00:53.50
IV.BOB.HHN. ML:1.7 0.0003545 1.28 AML other m 2021-02-15T18:00:54.30
IV.BOB.HHE. ML:1.8 0.000385 1.26 AML other m 2021-02-15T18:00:55.97
IV.MSSA.HHE. ML:2.4 0.0006215 0.1 AML other m 2021-02-15T18:01:03.58
IV.MSSA.HHN. ML:2.3 0.000476 0.1 AML other m 2021-02-15T18:01:03.61
GU.CANO.HHN. ML:1.8 7.545E-5 1.64 AML other m 2021-02-15T18:01:17.82
GU.CANO.HHE. ML:2.1 0.00013 0.92 AML other m 2021-02-15T18:01:24.83
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 miniseed + resp format Download