ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 1.4 on date 18-03-2019 and time 22:07:04 (UTC) in region 2 km N Borghetto d'Arroscia (IM)

A magnitude ML 1.4 earthquake occured in region: 2 km N Borghetto d'Arroscia (IM), on

  • 18-03-2019 22:07:04 (UTC)
  • 18-03-2019 23:07:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.08, 7.98 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
Borghetto d'Arroscia IM 2 456 456
Aquila d'Arroscia IM 2 166 622
Ranzo IM 3 557 1179
Vessalico IM 4 282 1461
Alto CN 4 128 1589
Caprauna CN 5 104 1693
Armo IM 6 111 1804
Onzo SV 6 219 2023
Nasino SV 6 207 2230
Pieve di Teco IM 6 1338 3568
Casanova Lerrone SV 7 749 4317
Vendone SV 7 388 4705
Cesio IM 8 283 4988
Castelbianco SV 9 330 5318
Testico SV 9 196 5514
Pornassio IM 9 685 6199
Ortovero SV 9 1586 7785
Caravonica IM 9 282 8067
Ormea CN 10 1617 9684
Arnasco SV 10 645 10329
Garlenda SV 10 1254 11583
Stellanello SV 10 808 12391
Rezzo IM 11 366 12757
Chiusanico IM 11 607 13364
Aurigo IM 11 347 13711
Borgomaro IM 11 865 14576
Zuccarello SV 11 309 14885
Chiusavecchia IM 12 577 15462
Lucinasco IM 12 272 15734
Erli SV 12 245 15979
Cosio d'Arroscia IM 12 221 16200
Castelvecchio di Rocca Barbena SV 12 145 16345
Cisano sul Neva SV 13 2085 18430
Montegrosso Pian Latte IM 13 118 18548
Villanova d'Albenga SV 13 2657 21205
Garessio CN 14 3244 24449
Mendatica IM 14 185 24634
Villa Faraldi IM 15 444 25078
Diano Arentino IM 15 722 25800
Pontedassio IM 15 2323 28123
Carpasio IM 16 168 28291
Vasia IM 16 389 28680
Balestrino SV 16 595 29275
Prelà IM 17 503 29778
Alassio SV 17 10934 40712
Diano San Pietro IM 17 1145 41857
Bardineto SV 18 756 42613
Laigueglia SV 18 1810 44423
Diano Castello IM 18 2214 46637
Andora SV 18 7552 54189
Briga Alta CN 19 39 54228
Albenga SV 19 24213 78441
Dolcedo IM 19 1415 79856
Toirano SV 19 2644 82500
San Bartolomeo al Mare IM 19 3129 85629
Molini di Triora IM 19 617 86246
Priola CN 19 701 86947
Montalto Ligure IM 20 377 87324
Cervo IM 20 1187 88511
Triora IM 20 355 88866
Diano Marina IM 20 5977 94843

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NE of Sanremo (54807 inhabitants)
47 Km SW of Savona (61345 inhabitants)
49 Km SE of Cuneo (56081 inhabitants)
85 Km W of Genova (586655 inhabitants)
93 Km S of Asti (76202 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 2019-03-18
22:07:04
44.08 7.98 9 2019-03-18
22:11:52
Sala Sismica INGV-Roma 66669901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-18 22:07:04 ± 0.15
Latitude 44.08 ± 0.01
Longitude 7.98 ± 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 66669901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1009
Semi-minor axis of confidence ellipse (meter) 700
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 112
Circular confidence region, given by single value of horizontal uncertainty (meter) 1010
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.06925
Epicentral distance of station farthest from the epicenter (degree) 0.50092
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
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 66669901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-18 22:11:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.STV.HHZ. 2019-03-18T22:07:21.70 0.6 undecidable manual S 290 0.5009 50 -0.71 40
GU.ENR.HHZ. 2019-03-18T22:07:20.17 0.6 undecidable manual S 291 0.4308 50 -0.17 47
GU.STV.HHZ. 2019-03-18T22:07:15.33 0.3 undecidable manual P 290 0.5009 50 0.45 65
GU.ENR.HHZ. 2019-03-18T22:07:13.77 0.3 undecidable manual P 291 0.4308 50 0.09 71
GU.CANO.HHZ. 2019-03-18T22:07:13.15 0.6 undecidable manual S 54 0.2248 109 -0.59 44
GU.GBOS.HHZ. 2019-03-18T22:07:12.39 0.6 undecidable manual S 328 0.1952 112 -0.28 48
IV.IMI.HHZ. 2019-03-18T22:07:11.71 0.3 undecidable manual S 201 0.1772 114 -0.34 71
GU.CANO.HHZ. 2019-03-18T22:07:09.91 0.1 undecidable manual P 54 0.2248 109 0.04 100
IV.IMI.HHZ. 2019-03-18T22:07:09.03 0.1 undecidable manual P 201 0.1772 114 0.14 99
GU.GBOS.HHZ. 2019-03-18T22:07:09.52 0.1 undecidable manual P 328 0.1952 112 0.28 96
GU.RORO.HHZ. 2019-03-18T22:07:08.44 0.3 undecidable manual S 59 0.0692 138 -0.17 75
GU.RORO.HHZ. 2019-03-18T22:07:07.21 0.1 undecidable manual P 59 0.0692 138 0.31 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RORO.HHE. ML:1.6 0.000666 0.08 AML other m 2019-03-18T22:07:08.67
GU.RORO.HHN. ML:1.4 0.0003675 0.18 AML other m 2019-03-18T22:07:08.69
IV.IMI.HHE. ML:1.4 0.000202 0.26 AML other m 2019-03-18T22:07:11.87
IV.IMI.HHN. ML:1.4 0.000181 1.7 AML other m 2019-03-18T22:07:11.07
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