Earthquake 4 km NE Trevi (PG), Magnitude ML 1.0, 27 April 2023 time 07:09:20 (Timezone UTC)

A magnitude ML 1.0 (quarry blast) earthquake occured in region: 4 km NE Trevi (PG), on

27-04-2023 07:09:20 (UTC)
27-04-2023 09:09:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9070, 12.7810 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
Trevi	PG	4	8469	8469
Foligno	PG	8	57155	65624
Campello sul Clitunno	PG	10	2442	68066
Montefalco	PG	11	5679	73745
Sellano	PG	12	1079	74824
Castel Ritaldi	PG	13	3278	78102
Spello	PG	13	8645	86747
Bevagna	PG	14	5081	91828
Cerreto di Spoleto	PG	15	1075	92903
Vallo di Nera	PG	17	364	93267
Valtopina	PG	17	1398	94665
Gualdo Cattaneo	PG	18	6155	100820
Giano dell'Umbria	PG	18	3846	104666
Cannara	PG	19	4305	108971
Spoleto	PG	19	38218	147189
Sant'Anatolia di Narco	PG	20	564	147753

Municipalities with at least 50000 inhabitants

An earthquake occurred to

8 Km SE of Foligno (57155 inhabitants)

39 Km SE of Perugia (166134 inhabitants)

40 Km N of Terni (111501 inhabitants)

78 Km NE of Viterbo (67173 inhabitants)

80 Km NW of L'Aquila (69753 inhabitants)

80 Km W of Teramo (54892 inhabitants)

96 Km SE of Arezzo (99543 inhabitants)

99 Km SW of Ancona (100861 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 1.0	2023-04-27 07:09:20	42.9073	12.7808	1	2024-03-01 17:18:20	Bollettino Sismico Italiano INGV	124928541
Reviewed Rev100	ML 1.0	2023-04-27 07:09:20	42.8992	12.7655	9	2023-04-27 07:21:20	Sala Sismica INGV-Roma	116791661

Preferred location and magnitude until now.

Origin information

Origin

Field	Value
Time (UTC)	2023-04-27 07:09:20 ± 0.12
Latitude	42.9073 ± 0.0081
Longitude	12.7808 ± 0.0111
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	124928541

Uncertainty

Field	Value
Preferred uncertainty description	uncertainty ellipse
Semi-major axis of confidence ellipse (meter)	1010
Semi-minor axis of confidence ellipse (meter)	730
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)	319
Circular confidence region, given by single value of horizontal uncertainty (meter)	1010.0
Confidence level of the uncertainty (%)	68

Quality

Field	Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)	91
Number of associated phases, regardless of their use for origin computation	30
Number of defining phases	10
RMS of the travel time residuals of the arrivals used for the origin computation (sec)	0.3
Epicentral distance of station closest to the epicenter (degree)	0.00000
Epicentral distance of station farthest from the epicenter (degree)	0.48204
Number of stations at which the event was observed	29
Number of stations from which data was used for origin computation	10

Magnitudes information

ML:1.0

Field	Value
Value	1.0
Uncertainty	0.3
Num. used stations	13
Type of magnitude	ML
Reference to an origin	116791661
Agency	INGV
Autore	Sala Sismica INGV-Roma
Time of creation (UTC)	2023-04-27 07:21:20

ML:1.0

Field	Value
Value	1.0
Uncertainty	0.2
Num. used stations	10
Type of magnitude	ML
Reference to an origin	124928541
Agency	INGV
Autore	Bollettino Sismico Italiano INGV
Time of creation (UTC)	2024-01-29 14:34:25

Picking and Arrival

SCNL	Time	Uncertainty	Polarity	Evaluation_mode	Phase	Azimuth	Distance(km)	Takeoff_angle	Residual	Weight
IV.SALB.HHZ.	2023-04-27T07:11:15.98	3.0	undecidable	manual	Sn				-1.65	0
IV.STAL.HHZ.	2023-04-27T07:11:02.14	3.0	undecidable	manual	Sg				5.23	0
GU.RORO.HHZ.	2023-04-27T07:11:02.60	3.0	undecidable	manual	Sn				-2.87	0
7C.SPAOL.HNZ.	2023-04-27T07:11:01.62	3.0	negative	manual	Pg				11.85	0
IV.ECTS.HHZ.	2023-04-27T07:10:58.96	3.0	undecidable	manual	Pg				13.36	0
IV.CDRU.HHZ.	2023-04-27T07:10:47.64	3.0	undecidable	manual	Sn				-6.21	0
IV.SOI.EHZ.	2023-04-27T07:10:45.13	3.0	undecidable	manual	Pn				-1.87	0
IV.PIPA.HHZ.	2023-04-27T07:10:43.07	3.0	negative	manual	Pg				8.04	0
SI.BOSI.HHZ.	2023-04-27T07:10:26.67	3.0	positive	manual	Pg				5.28	0
OX.MPRI.HHZ.	2023-04-27T07:10:21.06	3.0	positive	manual	Pg				5.23	0
OX.PLRO.HHZ.	2023-04-27T07:10:19.72	3.0	negative	manual	Pn				-0.42	0
IV.CERA.HHZ.	2023-04-27T07:10:10.19	3.0	undecidable	manual	S				-7.88	0
IV.RCAV.EHZ.	2023-04-27T07:09:56.42	3.0	undecidable	manual	S				-9.1	0
IV.SGG.HHZ.	2023-04-27T07:09:56.61	3.0	undecidable	manual	Pg				-2.12	0
IV.IMOL.HNZ.	2023-04-27T07:09:53.03	3.0	negative	manual	Pg				0.34	0
IV.FRON.EHZ.	2023-04-27T07:09:45.33	3.0	undecidable	manual	S				1.05	0
IV.OSSC.HHZ.	2023-04-27T07:09:44.89	3.0	undecidable	manual	P				-3.49	0
IV.ARVD.HHZ.	2023-04-27T07:09:41.34	3.0	undecidable	manual	S				-2.55	0
IV.RCAV.EHZ.	2023-04-27T07:09:39.00	3.0	undecidable	manual	P				-8.19	0
IV.APEC.HHZ.	2023-04-27T07:09:31.56	3.0	positive	manual	P				-5.84	0
IV.EL6.EHZ.	2023-04-27T07:09:30.49	0.6	undecidable	manual	P	29	53.502	91	-0.91	37
IV.CSP1.EHZ.	2023-04-27T07:09:28.48	0.3	undecidable	manual	P	59	40.0266	91	-0.22	71
IV.MML1.EHZ.	2023-04-27T07:09:26.36	0.3	undecidable	manual	P	34	27.6501	91	0.15	73
IV.NRCA.HHZ.	2023-04-27T07:09:26.20	0.3	undecidable	manual	P	107	28.3494	91	-0.15	73
IV.FDMO.HHZ.	2023-04-27T07:09:26.63	0.3	undecidable	manual	P	60	28.749	91	0.2	72
IT.GNU.HGE.	2023-04-27T07:09:25.12	0.3	undecidable	manual	P	236	20.6682	91	0.31	72
IV.GAVE.EHN.	2023-04-27T07:09:25.72	0.3	undecidable	manual	P	159	25.5522	91	-0.08	75
IV.CESI.HHZ.	2023-04-27T07:09:24.05	0.1	undecidable	manual	P	43	14.7741	92	0.41	95
IV.MOMA.HHZ.	2023-04-27T07:09:24.68	0.3	undecidable	manual	P	236	20.6682	91	-0.13	75
IV.ASSB.HHZ.	2023-04-27T07:09:24.16	0.1	undecidable	manual	P	327	17.9709	92	-0.12	100

Station Magnitude and Amplitude

SCNL	mag	Generic_amplitude	Period	Type	Category	Unit	Time_window_reference
IV.ASSB.HHN.	ML:1.2	0.00013350000000000002	1.76	AML	other	m	2023-04-27T07:09:28.94
IV.CESI.HHE.	ML:0.7	0.000058889025	0.32	AML	other	m	2023-04-27T07:09:28.81
IV.CESI.HHN.	ML:1.2	0.0001725336	0.2816	AML	other	m	2023-04-27T07:09:28.56
IV.ASSB.HHE.	ML:1.1	0.000126	1.42	AML	other	m	2023-04-27T07:09:28.04
IV.NRCA.HHE.	ML:1.0	0.00005405	0.16	AML	other	m	2023-04-27T07:09:31.68
IV.FDMO.HHN.	ML:1.1	0.00006379999999999999	0.24	AML	other	m	2023-04-27T07:09:32.63
IV.MML1.EHE.	ML:0.6	0.00002715	1.04	AML	other	m	2023-04-27T07:09:32.02
IV.MML1.EHN.	ML:0.7	0.000030550000000000004	0.28	AML	other	m	2023-04-27T07:09:32.48
IV.NRCA.HHN.	ML:1.0	0.00004935000000000001	0.54	AML	other	m	2023-04-27T07:09:33.29
IV.FDMO.HHE.	ML:1.0	0.000053849999999999994	0.4	AML	other	m	2023-04-27T07:09:34.28

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 1.0 on date 27-04-2023 and time 07:09:20 (UTC) in region 4 km NE Trevi (PG)

Municipalities within 20 km from the epicenter

Municipalities with at least 50000 inhabitants

Origin

Uncertainty

Quality

ML:1.0

ML:1.0