Earthquake 1 km NE Spotorno (SV), Magnitude ML 1.2, 21 July 2022 time 09:54:29 (Timezone UTC)

A magnitude ML 1.2 (quarry blast) earthquake occured in region: 1 km NE Spotorno (SV), on

21-07-2022 09:54:29 (UTC)
21-07-2022 11:54:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2360, 8.4310 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.

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Display location by

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).

Municipality	Region	Distance (km)	Inhabitants	Cumulative Inhabitants
Spotorno	SV	1	3803	3803
Bergeggi	SV	2	1129	4932
Noli	SV	3	2736	7668
Vado Ligure	SV	4	8336	16004
Vezzi Portio	SV	6	809	16813
Quiliano	SV	7	7232	24045
Orco Feglino	SV	9	890	24935
Savona	SV	9	61345	86280
Finale Ligure	SV	10	11711	97991
Calice Ligure	SV	11	1730	99721
Albissola Marina	SV	12	5487	105208
Mallare	SV	12	1146	106354
Rialto	SV	13	564	106918
Borgio Verezzi	SV	13	2205	109123
Altare	SV	13	2108	111231
Albisola Superiore	SV	13	10163	121394
Tovo San Giacomo	SV	14	2582	123976
Celle Ligure	SV	15	5237	129213
Magliolo	SV	15	974	130187
Pietra Ligure	SV	15	8992	139179
Pallare	SV	16	923	140102
Giustenice	SV	16	977	141079
Bormida	SV	17	387	141466
Carcare	SV	18	5587	147053
Loano	SV	18	11407	158460
Varazze	SV	18	13251	171711
Stella	SV	19	3009	174720
Osiglia	SV	19	444	175164

Municipalities with at least 50000 inhabitants

An earthquake occurred to

9 Km SW of Savona (61345 inhabitants)

45 Km W of Genova (586655 inhabitants)

69 Km NE of Sanremo (54807 inhabitants)

72 Km E of Cuneo (56081 inhabitants)

76 Km S of Asti (76202 inhabitants)

77 Km S of Alessandria (93943 inhabitants)

Recent and historical seismicity

Not available maps for this sismic event.

Seismic hazard

Not available maps for this sismic event.

Shakemap

Not available maps for this sismic event.

Felt maps

Not available maps for this sismic event.

Locations history

Type	Magnitude	Date and Time (UTC)	Latitude	Longitude	Depth (km)	Published time (UTC)	Author	Location ID
Bulletin Rev1000	ML 1.2	2022-07-21 09:54:29	44.2357	8.4313	1	2023-01-31 19:03:50	Bollettino Sismico Italiano INGV	110574491
Reviewed Rev100	ML 1.2	2022-07-21 09:54:30	44.2708	8.3782	11	2022-07-21 10:02:47	Sala Sismica INGV-Roma	107515131

Preferred location and magnitude until now.

Origin information

Origin

Field	Value
Time (UTC)	2022-07-21 09:54:29 ± 0.28
Latitude	44.2357 ± 0.0180
Longitude	8.4313 ± 0.0188
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	110574491

Uncertainty

Field	Value
Preferred uncertainty description	uncertainty ellipse
Semi-major axis of confidence ellipse (meter)	2290
Semi-minor axis of confidence ellipse (meter)	1040
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)	326
Circular confidence region, given by single value of horizontal uncertainty (meter)	2290.0
Confidence level of the uncertainty (%)	68

Quality

Field	Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)	188
Number of associated phases, regardless of their use for origin computation	27
Number of defining phases	6
RMS of the travel time residuals of the arrivals used for the origin computation (sec)	0.33
Epicentral distance of station closest to the epicenter (degree)	0.00000
Epicentral distance of station farthest from the epicenter (degree)	0.43977
Number of stations at which the event was observed	25
Number of stations from which data was used for origin computation	6

Magnitudes information

ML:1.2

Field	Value
Value	1.2
Uncertainty	0.3
Num. used stations	4
Type of magnitude	ML
Reference to an origin	107515131
Agency	INGV
Autore	Sala Sismica INGV-Roma
Time of creation (UTC)	2022-07-21 10:02:47

ML:1.2

Field	Value
Value	1.2
Uncertainty	0.2
Num. used stations	4
Type of magnitude	ML
Reference to an origin	110574491
Agency	INGV
Autore	Bollettino Sismico Italiano INGV
Time of creation (UTC)	2022-10-07 08:03:20

Picking and Arrival

SCNL	Time	Uncertainty	Polarity	Evaluation_mode	Phase	Azimuth	Distance(km)	Takeoff_angle	Residual	Weight
IV.NOCI.HHZ.	2022-07-21T09:56:18.32	3.0	positive	manual	Pn				4.34	0
IV.PAOL.HNZ.	2022-07-21T09:56:07.87	3.0	undecidable	manual	Pg				17.209999	0
IX.SCL3.EHZ.02	2022-07-21T09:56:02.70	3.0	negative	manual	Pn				1.4	0
IV.SSFR.HHZ.	2022-07-21T09:55:59.62	3.0	undecidable	manual	Sn				0.07	0
IV.SACS.HHZ.	2022-07-21T09:55:58.94	3.0	undecidable	manual	Sn				7.33	0
IV.MPAG.EHZ.	2022-07-21T09:55:58.82	3.0	undecidable	manual	Sn				1.09	0
IV.NARO.HHZ.	2022-07-21T09:55:56.03	3.0	undecidable	manual	Sn				1.22	0
CH.BERNI.HHZ.	2022-07-21T09:55:41.05	3.0	undecidable	manual	Sg				11	0
IV.SNTG.HHZ.	2022-07-21T09:55:35.68	3.0	undecidable	manual	Pg				14.92	0
IV.PTCC.HHZ.	2022-07-21T09:55:34.00	3.0	undecidable	manual	Pn				7.17	0
IV.MPAG.EHZ.	2022-07-21T09:55:33.85	3.0	positive	manual	Pg				16.459999	0
IV.FRON.EHZ.	2022-07-21T09:55:32.69	3.0	undecidable	manual	Pg				15.17	0
RD.PGF.BHZ.	2022-07-21T09:55:26.84	3.0	undecidable	manual	Sg				3.64	0
IV.BAG8.EHZ.	2022-07-21T09:55:23.00	3.0	undecidable	manual	Sn				-1.96	0
ST.PANI.EHZ.	2022-07-21T09:55:17.76	3.0	positive	manual	Pg				10.18	0
GU.MAIM.HHZ.	2022-07-21T09:55:15.13	3.0	undecidable	manual	Sn				-2.21	0
IV.CSNT.HHZ.	2022-07-21T09:55:06.83	3.0	undecidable	manual	Pn				2.46	0
IV.OSSC.HHZ.	2022-07-21T09:55:02.67	3.0	undecidable	manual	Pn				-1.01	0
IV.BRMO.HHZ.	2022-07-21T09:55:01.25	3.0	negative	manual	Pn				-3.31	0
IV.BAG8.EHZ.	2022-07-21T09:54:59.76	3.0	undecidable	manual	Pn				0.78	0
CH.MUGIO.HHZ.	2022-07-21T09:54:51.55	3.0	negative	manual	Pn				0.34	0
GU.RNCA.HHZ.	2022-07-21T09:54:39.91	0.3	undecidable	manual	P	57	48.8178	91	0.19	72
GU.GBOS.HHZ.	2022-07-21T09:54:38.87	0.6	undecidable	manual	P	271	47.0196	91	-0.49	45
GU.RORO.HHZ.	2022-07-21T09:54:36.35	0.3	undecidable	manual	P	245	32.0457	91	-0.02	76
GU.PCP.HHE.	2022-07-21T09:54:36.55	0.3	undecidable	manual	P	15	35.0427	91	-0.42	70
GU.CANO.HHZ.	2022-07-21T09:54:33.25	0.3	undecidable	manual	P	259	15.7731	92	0.15	77
IV.QLNO.HHZ.	2022-07-21T09:54:32.62	0.1	positive	manual	P	325	11.9769	92	0.28	100

Station Magnitude and Amplitude

SCNL	mag	Generic_amplitude	Period	Type	Category	Unit	Time_window_reference
IV.QLNO.HHN.	ML:0.8	0.0001013	0.68	AML	other	m	2022-07-21T09:54:35.56
GU.CANO.HHE.	ML:1.4	0.00029200000000000005	0.32	AML	other	m	2022-07-21T09:54:36.65
IV.QLNO.HHE.	ML:1.2	0.000259	0.44	AML	other	m	2022-07-21T09:54:36.77
GU.CANO.HHN.	ML:1.2	0.0001875	0.38	AML	other	m	2022-07-21T09:54:37.27

TDMT - Time Domain Moment Tensor

Not available TDMT solution for this seismic event.

Fault Plane solutions in the area

Not available maps for this sismic event.

Download

Type	Description	Link
QuakeML - small	Event, Origin, FocalMechanism	Download
QuakeML - full	Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude	Download

Earthquake (quarry blast) with magnitude of ML 1.2 on date 21-07-2022 and time 09:54:29 (UTC) in region 1 km NE Spotorno (SV)

Municipalities within 20 km from the epicenter

Municipalities with at least 50000 inhabitants

Origin

Uncertainty

Quality

ML:1.2

ML:1.2