Earthquake 6 km SW Sefro (MC), Magnitude ML 1.1, 8 May 2023 time 09:58:39 (Timezone Italy)

A magnitude ML 1.1 (quarry blast) earthquake occured in region: 6 km SW Sefro (MC), on

08-05-2023 07:58:39 (UTC)
08-05-2023 09:58:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1200, 12.8910 at 1 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Sefro	MC	6	422	422
Serravalle di Chienti	MC	7	1070	1492
Nocera Umbra	PG	8	5839	7331
Fiuminata	MC	9	1402	8733
Pioraco	MC	10	1134	9867
Valtopina	PG	13	1398	11265
Muccia	MC	13	915	12180
Camerino	MC	15	6974	19154
Gualdo Tadino	PG	15	15208	34362
Pieve Torina	MC	15	1458	35820
Esanatoglia	MC	16	2034	37854
Monte Cavallo	MC	17	145	37999
Pievebovigliana	MC	17	866	38865
Castelraimondo	MC	17	4587	43452
Matelica	MC	18	9981	53433
Fiordimonte	MC	19	202	53635
Gagliole	MC	20	620	54255

Municipalities with at least 50000 inhabitants

An earthquake occurred to

24 Km NE of Foligno (57155 inhabitants)

41 Km E of Perugia (166134 inhabitants)

65 Km NE of Terni (111501 inhabitants)

75 Km SW of Ancona (100861 inhabitants)

81 Km S of Fano (60888 inhabitants)

84 Km NW of Teramo (54892 inhabitants)

88 Km S of Pesaro (94582 inhabitants)

90 Km E of Arezzo (99543 inhabitants)

95 Km NW of L'Aquila (69753 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
Reviewed Rev100	ML 1.1	2023-05-08 07:58:39	43.1195	12.8907	1	2023-05-08 08:05:12	Sala Sismica INGV-Roma	117142571

Preferred location and magnitude until now.

Origin information

Origin

Field	Value
Time (UTC)	2023-05-08 07:58:39 ± 0.11
Latitude	43.1195 ± 0.0072
Longitude	12.8907 ± 0.0062
Depth (km)	1 (operator assigned)
Evaluation mode of Origin	manual
Evaluation status of Origin	reviewed
Version	100 -> SURVEY-INGV
Event type	quarry blast
Origin ID	117142571

Uncertainty

Field	Value
Preferred uncertainty description	uncertainty ellipse
Semi-major axis of confidence ellipse (meter)	780
Semi-minor axis of confidence ellipse (meter)	480
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)	348
Circular confidence region, given by single value of horizontal uncertainty (meter)	780.0
Confidence level of the uncertainty (%)	68

Quality

Field	Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)	126
Number of associated phases, regardless of their use for origin computation	32
Number of defining phases	10
RMS of the travel time residuals of the arrivals used for the origin computation (sec)	0.28
Epicentral distance of station closest to the epicenter (degree)	0.00000
Epicentral distance of station farthest from the epicenter (degree)	0.30307
Number of stations at which the event was observed	28
Number of stations from which data was used for origin computation	6

Magnitude information

ML:1.1

Field	Value
Value	1.1
Uncertainty	0.4
Num. used stations	8
Type of magnitude	ML
Reference to an origin	117142571
Agency	INGV
Autore	Sala Sismica INGV-Roma
Time of creation (UTC)	2023-05-08 08:05:12

Picking and Arrival

SCNL	Time	Uncertainty	Polarity	Evaluation_mode	Phase	Azimuth	Distance(km)	Takeoff_angle	Residual	Weight
IV.MBFT.HHZ.	2023-05-08T08:00:08.15	3.0	undecidable	manual	Pg				16.469999	0
1J.FX14.HHZ.00	2023-05-08T08:00:06.73	3.0	negative	manual	Pn				5.64	0
OT.OT17.EHZ.	2023-05-08T08:00:00.10	3.0	undecidable	manual	Sn				5.72	0
IV.EPOZ.HNZ.	2023-05-08T07:59:58.24	3.0	negative	manual	Pn				-3	0
IV.GATE.HHZ.	2023-05-08T07:59:55.23	3.0	undecidable	manual	Sn				3.8	0
IV.ORI.HHZ.	2023-05-08T07:59:52.73	3.0	positive	manual	Pg				13.09	0
IV.GIUL.HHZ.	2023-05-08T07:59:39.54	3.0	undecidable	manual	Sg				5.38	0
IV.SCHR.EHZ.	2023-05-08T07:59:39.01	3.0	positive	manual	Pn				3.44	0
IX.SCL3.EHZ.02	2023-05-08T07:59:38.67	3.0	undecidable	manual	Pg				12.09	0
IV.PTRP.HHZ.	2023-05-08T07:59:34.21	3.0	undecidable	manual	Pn				2.12	0
MN.SENA.HHZ.	2023-05-08T07:59:27.32	3.0	negative	manual	Pn				3.98	0
GU.RNCA.HHZ.	2023-05-08T07:59:26.44	3.0	undecidable	manual	Sn				-2.08	0
IV.MCRV.HHZ.	2023-05-08T07:59:24.68	3.0	negative	manual	Pn				1.23	0
IV.GUMA.HHZ.	2023-05-08T07:59:06.59	3.0	undecidable	manual	S				1.18	0
IV.MAGA.HHZ.	2023-05-08T07:59:02.79	3.0	negative	manual	Pn				3.02	0
GU.POPM.HHZ.	2023-05-08T07:59:00.76	3.0	undecidable	manual	S				4.23	0
IV.LRP.EHZ.	2023-05-08T07:58:58.96	3.0	undecidable	manual	Pn				-5.74	0
IV.MPAG.EHZ.	2023-05-08T07:58:51.06	3.0	undecidable	manual	S				-0.06	0
IV.MURB.HHZ.	2023-05-08T07:58:51.38	0.3	undecidable	manual	S	298	33.6441	91	0.3	69
IV.EL6.EHZ.	2023-05-08T07:58:49.76	0.3	undecidable	manual	S	36	28.8489	92	0.33	69
IV.SMA1.EHZ.	2023-05-08T07:58:49.45	3.0	positive	manual	Pn				-2.78	0
IV.CSP1.EHZ.	2023-05-08T07:58:48.68	0.3	undecidable	manual	S	97	25.6521	92	0.37	69
IV.CSNT.HHZ.	2023-05-08T07:58:46.59	3.0	undecidable	manual	S				-4.23	0
IV.ASSB.HHZ.	2023-05-08T07:58:46.65	0.3	undecidable	manual	S	246	20.6682	92	0.07	74
IV.MURB.HHZ.	2023-05-08T07:58:45.64	1.0	positive	manual	P	298	33.6441	91	-0.51	22
IV.CSP1.EHZ.	2023-05-08T07:58:44.18	0.6	negative	manual	P	97	25.6521	92	-0.37	46
IV.EL6.EHZ.	2023-05-08T07:58:44.80	0.3	undecidable	manual	P	36	28.8489	92	-0.4	68
IV.ASSB.HHZ.	2023-05-08T07:58:43.54	0.1	undecidable	manual	P	246	20.6682	92	-0.01	100
IV.FDMO.HHZ.	2023-05-08T07:58:43.08	0.3	undecidable	manual	P	120	18.3705	92	-0.02	75
IV.SNTG.HHZ.	2023-05-08T07:58:42.36	0.1	undecidable	manual	P	15	15.5733	93	-0.17	98
IV.IMOL.HNZ.	2023-05-08T07:58:38.34	3.0	positive	manual	P				-0.85	0
IV.LMD.HHZ.	2023-05-08T07:58:36.35	3.0	negative	manual	P				-0.74	0

Station Magnitude and Amplitude

SCNL	mag	Generic_amplitude	Period	Type	Category	Unit	Time_window_reference
IV.SNTG.HHE.	ML:0.6	0.0000432	0.88	AML	other	m	2023-05-08T07:58:47.46
IV.SNTG.HHN.	ML:0.4	0.000029699999999999997	1.36	AML	other	m	2023-05-08T07:58:47.07
IV.ASSB.HHN.	ML:0.8	0.0000531	0.48	AML	other	m	2023-05-08T07:58:48.27
IV.ASSB.HHE.	ML:0.8	0.00005	0.98	AML	other	m	2023-05-08T07:58:48.20
IV.MURB.HHN.	ML:1.4	0.0001035	0.22	AML	other	m	2023-05-08T07:58:52.74
IV.MURB.HHE.	ML:1.5	0.0001375	0.2	AML	other	m	2023-05-08T07:58:53.35
IV.GUMA.HHE.	ML:1.5	0.000135	1.82	AML	other	m	2023-05-08T07:58:53.94
IV.GUMA.HHN.	ML:1.4	0.0001007	0.48	AML	other	m	2023-05-08T07:58:54.73

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 1.1 on date 08-05-2023 and time 09:58:39 (Italy) in region 6 km SW Sefro (MC)

Municipalities within 20 km from the epicenter

Municipalities with at least 50000 inhabitants

Origin

Uncertainty

Quality

ML:1.1