Earthquake (quarry blast) with magnitude of ML 1.8 on date 16-03-2023 and time 08:58:11 (UTC) in region 5 km SE Orroli (CA)

A magnitude ML 1.8 (quarry blast) earthquake occured in region: 5 km SE Orroli (CA), on

  • 16-03-2023 08:58:11 (UTC)
  • 16-03-2023 09:58:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 39.6730, 9.3060 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

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
Orroli CA 5 2298 2298
Escalaplano CA 7 2201 4499
Nurri CA 8 2184 6683
Goni CA 11 492 7175
Perdasdefogu OG 12 1957 9132
Esterzili CA 12 668 9800
Siurgus Donigala CA 13 2028 11828
Serri CA 14 660 12488
Villanova Tulo CA 14 1108 13596
Ballao CA 15 831 14427
Mandas CA 15 2201 16628
Escolca CA 16 594 17222
Sadali CA 16 971 18193
Ussassai OG 17 575 18768
Silius CA 17 1202 19970
San Basilio CA 18 1251 21221
Gergei CA 18 1236 22457
Armungia CA 18 481 22938
Gesico CA 18 849 23787
Seui OG 19 1310 25097
Isili CA 19 2741 27838
Suelli CA 19 1127 28965
San Nicolò Gerrei CA 20 788 29753

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km N of Quartu Sant'Elena (71125 inhabitants)
53 Km NE of Cagliari (154460 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 1.8 2023-03-16
08:58:11
39.6728 9.3062 1 2024-03-01
17:18:10
Bollettino Sismico Italiano INGV 118123231
Reviewed
Rev100
ML 1.8 2023-03-16
08:58:10
39.6778 9.3212 1 2023-03-16
09:09:52
Sala Sismica INGV-Roma 115425301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-16 08:58:11 ± 0.06
Latitude 39.6728 ± 0.0027
Longitude 9.3062 ± 0.0105
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 118123231

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 900
Semi-minor axis of confidence ellipse (meter) 330
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 266
Circular confidence region, given by single value of horizontal uncertainty (meter) 900.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 155
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.18526
Epicentral distance of station farthest from the epicenter (degree) 0.86065
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 118123231
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-12-18 17:35:38

ML:1.8

Field Value
Value 1.8
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 115425301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-16 09:09:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
TV.SU26.HHZ. 2023-03-16T08:58:28.16 0.3 undecidable manual P 229 92.8404 50 0.04 66
IV.BULT.EHN. 2023-03-16T08:58:28.60 0.3 undecidable manual P 346 95.5377 50 0.06 66
MN.SENA.HHZ. 2023-03-16T08:58:27.09 0.3 undecidable manual P 8 86.5467 50 -0.07 67
IV.CGL.HHZ. 2023-03-16T08:58:17.78 0.1 positive manual P 181 34.0437 91 -0.09 97
MN.VSL.HHZ. 2023-03-16T08:58:15.25 0.1 positive manual P 163 20.5683 91 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.VSL.HHN. ML:1.2 0.00014606945 0.2432 AML other m 2023-03-16T08:58:18.05
MN.VSL.HHE. ML:1.7 0.0004115 0.22 AML other m 2023-03-16T08:58:18.32
IV.CGL.HHN. ML:1.6 0.000188 0.22 AML other m 2023-03-16T08:58:22.62
IV.CGL.HHE. ML:1.7 0.0002415 0.28 AML other m 2023-03-16T08:58:22.78
MN.SENA.HHN. ML:2.4 0.00030168816500000003 1.1776 AML other m 2023-03-16T08:58:38.45
MN.SENA.HHE. ML:2.3 0.0002466303 0.7232 AML other m 2023-03-16T08:58:37.96
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download