Earthquake 4 km S Cagli (PU), Magnitude ML 0.8, 31 March 2021 time 08:43:09 (Timezone Italy)

A magnitude ML 0.8 (quarry blast) earthquake occured in region: 4 km S Cagli (PU), on

31-03-2021 06:43:09 (UTC)
31-03-2021 08:43:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5140, 12.6490 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
Cagli	PU	4	8731	8731
Cantiano	PU	5	2245	10976
Frontone	PU	7	1300	12276
Serra Sant'Abbondio	PU	10	1027	13303
Acqualagna	PU	12	4393	17696
Scheggia e Pascelupo	PG	12	1393	19089
Piobbico	PU	14	2029	21118
Pergola	PU	16	6333	27451
Costacciaro	PG	18	1216	28667
Fermignano	PU	18	8596	37263
Gubbio	PG	19	32216	69479
Pietralunga	PG	19	2111	71590
Sassoferrato	AN	19	7285	78875
Apecchio	PU	19	1882	80757
Urbania	PU	20	7099	87856

Municipalities with at least 50000 inhabitants

An earthquake occurred to

47 Km SW of Fano (60888 inhabitants)

49 Km SW of Pesaro (94582 inhabitants)

50 Km NE of Perugia (166134 inhabitants)

61 Km S of Rimini (147750 inhabitants)

62 Km E of Arezzo (99543 inhabitants)

62 Km N of Foligno (57155 inhabitants)

71 Km W of Ancona (100861 inhabitants)

77 Km SE of Cesena (96758 inhabitants)

93 Km SE of Forlì (117913 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 0.8	2021-03-31 06:43:09	43.5142	12.6492	1	2021-07-12 16:55:10	Bollettino Sismico Italiano INGV	90019821
Reviewed Rev100	ML 1.5	2021-03-31 06:43:09	43.5167	12.6582	6	2021-03-31 06:59:42	Sala Sismica INGV-Roma	88633191

Preferred location and magnitude until now.

Origin information

Origin

Field	Value
Time (UTC)	2021-03-31 06:43:09 ± 0.07
Latitude	43.5142 ± 0.0054
Longitude	12.6492 ± 0.0050
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	90019821

Uncertainty

Field	Value
Preferred uncertainty description	uncertainty ellipse
Semi-major axis of confidence ellipse (meter)	570
Semi-minor axis of confidence ellipse (meter)	410
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)	9
Circular confidence region, given by single value of horizontal uncertainty (meter)	570.0
Confidence level of the uncertainty (%)	68

Quality

Field	Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)	79
Number of associated phases, regardless of their use for origin computation	32
Number of defining phases	8
RMS of the travel time residuals of the arrivals used for the origin computation (sec)	0.17
Epicentral distance of station closest to the epicenter (degree)	0.00000
Epicentral distance of station farthest from the epicenter (degree)	0.14299
Number of stations at which the event was observed	30
Number of stations from which data was used for origin computation	8

Magnitudes information

ML:0.8

Field	Value
Value	0.8
Uncertainty	0.4
Num. used stations	8
Type of magnitude	ML
Reference to an origin	90019821
Agency	INGV
Autore	Bollettino Sismico Italiano INGV
Time of creation (UTC)	2021-05-20 10:18:55

ML:1.5

Field	Value
Value	1.5
Uncertainty	1.0
Num. used stations	18
Type of magnitude	ML
Reference to an origin	88633191
Agency	INGV
Autore	Sala Sismica INGV-Roma
Time of creation (UTC)	2021-03-31 06:59:42

Picking and Arrival

SCNL	Time	Uncertainty	Polarity	Evaluation_mode	Phase	Azimuth	Distance(km)	Takeoff_angle	Residual	Weight
IV.SPS2.HHZ.	2021-03-31T06:44:45.32	3.0	undecidable	manual	Sn				2.95	0
IV.ZEN8.EHZ.	2021-03-31T06:44:43.52	3.0	undecidable	manual	Sg				13.52	0
IV.GIZZ.HHZ.	2021-03-31T06:44:41.18	3.0	undecidable	manual	Sn				-5.82	0
IV.SENA.HHZ.	2021-03-31T06:44:38.60	3.0	undecidable	manual	Sg				15.37	0
IV.VOBA.EHZ.	2021-03-31T06:44:37.05	3.0	undecidable	manual	Sn				5.09	0
MN.TRI.HHZ.	2021-03-31T06:44:24.13	3.0	undecidable	manual	Sn				0.17	0
IV.ZCCA.HHZ.	2021-03-31T06:44:04.18	3.0	undecidable	manual	Sg				3.12	0
IV.MTRZ.HNZ.	2021-03-31T06:43:55.17	3.0	undecidable	manual	Sn				-0.69	0
IV.AGLI.HHZ.	2021-03-31T06:43:51.75	3.0	positive	manual	Pg				11.28	0
IV.ZEN8.EHZ.	2021-03-31T06:43:47.99	3.0	undecidable	manual	Pn				1.18	0
IV.FIR.HHZ.	2021-03-31T06:43:45.16	3.0	undecidable	manual	Sn				-1.96	0
IV.VAGA.HHZ.	2021-03-31T06:43:36.62	3.0	undecidable	manual	Sn				-0.76	0
IV.FIR.HHZ.	2021-03-31T06:43:28.16	3.0	negative	manual	Pg				5.44	0
IV.PTRJ.HNZ.	2021-03-31T06:43:25.71	3.0	undecidable	manual	Pg				5.8	0
IV.CSNT.HHZ.	2021-03-31T06:43:22.56	3.0	negative	manual	Pg				2.93	0
IV.MELA.HHZ.	2021-03-31T06:43:21.85	3.0	positive	manual	Pn				-0.61	0
IV.GIUL.HHZ.	2021-03-31T06:43:20.86	3.0	undecidable	manual	S				-3.21	0
IV.CERA.HHZ.	2021-03-31T06:43:15.82	3.0	positive	manual	Pg				1.91	0
IV.ATPC.HHZ.	2021-03-31T06:43:13.12	0.1	positive	manual	P	257	15.873	92	0.16	98
IV.SSFR.HHN.	2021-03-31T06:43:12.44	0.1	undecidable	manual	P	129	13.7751	92	-0.09	100
IV.NARO.HHZ.	2021-03-31T06:43:12.12	0.3	undecidable	manual	P	333	12.0768	92	-0.07	75
IV.MPAG.EHZ.	2021-03-31T06:43:12.93	0.3	undecidable	manual	P	35	15.5733	92	0.05	75
IV.PIEI.HHZ.	2021-03-31T06:43:11.45	0.1	positive	manual	P	285	9.4794	93	-0.22	98
IV.ATBU.HNZ.	2021-03-31T06:43:11.81	0.3	undecidable	manual	P	242	9.1797	93	0.2	74
IV.FRON.EHZ.	2021-03-31T06:43:11.14	0.1	positive	manual	P	86	6.1938	95	0.13	100
IV.ATSC.EHE.	2021-03-31T06:43:11.70	0.3	undecidable	manual	P	163	10.4784	93	-0.16	74
IV.MC2.EHZ.	2021-03-31T06:43:06.31	3.0	undecidable	manual	S				-4.23	0
IV.MNTT.EHZ.	2021-03-31T06:43:06.65	3.0	negative	manual	P				-0.76	0
IV.VIVA.HHZ.	2021-03-31T06:43:05.55	3.0	negative	manual	P				-0.27	0
IV.MMO1.EHZ.	2021-03-31T06:43:03.38	3.0	positive	manual	P				0.55	0
IV.CESX.HHZ.	2021-03-31T06:43:02.09	3.0	undecidable	manual	S				-1.7	0
IV.GAVE.EHZ.	2021-03-31T06:42:56.34	3.0	undecidable	manual	P				-0.88	0

Station Magnitude and Amplitude

SCNL	mag	Generic_amplitude	Period	Type	Category	Unit	Time_window_reference
IV.NARO.HHE.	ML:0.4	0.0000374	1.04	AML	other	m	2021-03-31T06:43:14.25
IV.NARO.HHN.	ML:0.2	0.000025450000000000002	0.62	AML	other	m	2021-03-31T06:43:18.41
IV.MPAG.EHN.	ML:0.6	0.000045700000000000006	0.94	AML	other	m	2021-03-31T06:43:19.28
IV.MPAG.EHE.	ML:0.4	0.000031	0.74	AML	other	m	2021-03-31T06:43:19.77
IV.SSFR.HHE.	ML:1.0	0.0001325	1.38	AML	other	m	2021-03-31T06:43:31.13
IV.SSFR.HNE.	ML:1.5	0.0004285	0.58	AML	other	m	2021-03-31T06:43:31.83
IV.SSFR.HHN.	ML:1.0	0.0001385	1.38	AML	other	m	2021-03-31T06:43:32.83
IV.SSFR.HNN.	ML:1.3	0.00028700000000000004	0.78	AML	other	m	2021-03-31T06:43:34.06

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 0.8 on date 31-03-2021 and time 08:43:09 (Italy) in region 4 km S Cagli (PU)

Municipalities within 20 km from the epicenter

Municipalities with at least 50000 inhabitants

Origin

Uncertainty

Quality

ML:0.8

ML:1.5