Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 26-08-2021 and time 04:01:02 (Italy) in region 3 km W Monte Cavallo (MC)

A magnitude ML 1.2 earthquake occured in region: 3 km W Monte Cavallo (MC), on

  • 26-08-2021 02:01:02 (UTC)
  • 26-08-2021 04:01:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0040, 12.9640 at 12 km depth.

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

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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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Monte Cavallo MC 3 145 145
Serravalle di Chienti MC 8 1070 1215
Pieve Torina MC 9 1458 2673
Muccia MC 11 915 3588
Fiordimonte MC 11 202 3790
Pievebovigliana MC 12 866 4656
Sellano PG 13 1079 5735
Visso MC 13 1107 6842
Preci PG 15 724 7566
Ussita MC 16 444 8010
Sefro MC 16 422 8432
Fiastra MC 16 559 8991
Camerino MC 17 6974 15965
Acquacanina MC 18 121 16086
Valtopina PG 18 1398 17484
Nocera Umbra PG 19 5839 23323
Castelsantangelo sul Nera MC 20 281 23604
Pioraco MC 20 1134 24738

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km E of Foligno (57155 inhabitants)
48 Km E of Perugia (166134 inhabitants)
56 Km NE of Terni (111501 inhabitants)
72 Km NW of Teramo (54892 inhabitants)
81 Km NW of L'Aquila (69753 inhabitants)
82 Km SW of Ancona (100861 inhabitants)
94 Km S of Fano (60888 inhabitants)
96 Km NE of Viterbo (67173 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
Reviewed
Rev100 		ML 1.2 2021-08-26
02:01:02		 43.0037 12.9637 12 2021-08-26
02:04:57		 Sala Sismica INGV-Roma 94641501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-26 02:01:02 ± 0.06
Latitude 43.0037 ± 0.0027
Longitude 12.9637 ± 0.0049
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94641501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 348
Semi-minor axis of confidence ellipse (meter) 290
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 236
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 125
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.41189
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 94641501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-26 02:04:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FRON.EHZ. 2021-08-26T02:01:13.18 3.0 positive manual P -0.22 0
IV.ARVD.HHZ. 2021-08-26T02:01:12.39 3.0 negative manual P -0.13 0
IV.SSFR.HHZ. 2021-08-26T02:01:11.64 3.0 negative manual P -0.11 0
IV.ARRO.EHZ. 2021-08-26T02:01:11.59 3.0 negative manual P -0.19 0
IV.MURB.HHZ. 2021-08-26T02:01:11.11 1.0 undecidable manual P 309 45.7209 91 0.12 23
IV.CING.HHZ. 2021-08-26T02:01:10.91 3.0 positive manual P -0.04 0
IV.MC2.EHZ. 2021-08-26T02:01:10.89 0.6 undecidable manual S 119 20.9679 95 0.31 46
IV.NRCA.HHZ. 2021-08-26T02:01:10.72 0.6 undecidable manual S 147 22.4553 94 -0.27 46
IV.FOSV.EHZ. 2021-08-26T02:01:09.41 0.6 positive manual P 333 36.2415 92 -0.12 47
IV.GAVE.EHZ. 2021-08-26T02:01:09.30 3.0 positive manual P -0.05 0
IV.EL6.EHZ. 2021-08-26T02:01:09.72 0.3 positive manual P 17 37.8288 92 -0.05 71
IV.ATCC.EHZ. 2021-08-26T02:01:09.05 0.6 positive manual P 308 33.0447 92 0.01 48
IV.MML1.EHZ. 2021-08-26T02:01:08.19 0.6 undecidable manual S 3 12.1767 115 -0.12 49
IV.GUMA.HHZ. 2021-08-26T02:01:08.96 3.0 negative manual P 0.32 0
IV.MMO1.EHZ. 2021-08-26T02:01:08.73 3.0 positive manual P -0.08 0
IV.NRCA.HHZ. 2021-08-26T02:01:07.28 0.6 undecidable manual P 147 22.4553 94 -0.13 48
IV.CSP1.EHZ. 2021-08-26T02:01:07.31 0.6 undecidable manual P 63 21.867 94 -0.01 49
IV.MC2.EHZ. 2021-08-26T02:01:07.20 0.6 undecidable manual P 119 20.9679 95 0.02 49
IV.ASSB.HHZ. 2021-08-26T02:01:07.77 0.3 negative manual P 280 25.1526 93 -0.05 72
IT.MTCL.HGZ. 2021-08-26T02:01:06.48 0.6 undecidable manual S 110 3.0969 161 -0.2 49
IV.CESI.HHZ. 2021-08-26T02:01:06.96 0.6 undecidable manual S 272 4.7952 151 0.09 50
IT.MTCL.HGZ. 2021-08-26T02:01:05.00 0.1 negative manual P 110 3.0969 161 0.07 100
IV.CESI.HHZ. 2021-08-26T02:01:05.22 0.1 negative manual P 272 4.7952 151 0.19 98
IV.MML1.EHZ. 2021-08-26T02:01:05.90 1.0 negative manual P 3 12.1767 115 0.04 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:1.5 0.0004805 0.36 AML other m 2021-08-26T02:01:07.04
IV.CESI.HHN. ML:1.7 0.000746 0.12 AML other m 2021-08-26T02:01:07.16
IV.MML1.EHN. ML:1.4 0.0002515 0.12 AML other m 2021-08-26T02:01:08.53
IV.MML1.HNN. ML:1.4 0.0002895 0.9 AML other m 2021-08-26T02:01:08.53
IV.MML1.HNE. ML:1.8 0.000603 0.14 AML other m 2021-08-26T02:01:08.50
IV.MML1.EHE. ML:1.8 0.0006175000000000001 0.14 AML other m 2021-08-26T02:01:08.50
IV.NRCA.HHE. ML:1.5 0.0001905 0.08 AML other m 2021-08-26T02:01:10.95
IV.CSP1.EHN. ML:1.6 0.00022999999999999998 0.4 AML other m 2021-08-26T02:01:11.08
IV.CSP1.EHE. ML:1.5 0.0001895 1.62 AML other m 2021-08-26T02:01:11.11
IV.ASSB.HHN. ML:0.8 0.00004155 0.72 AML other m 2021-08-26T02:01:11.80
IV.NRCA.HHN. ML:1.4 0.00014450000000000002 1.06 AML other m 2021-08-26T02:01:12.11
IV.GUMA.HHE. ML:1.1 0.000055150000000000006 0.54 AML other m 2021-08-26T02:01:14.00
IV.ASSB.HHE. ML:1.0 0.0000539 0.66 AML other m 2021-08-26T02:01:14.61
IV.ATCC.EHE. ML:1.2 0.000058700000000000004 0.1 AML other m 2021-08-26T02:01:14.32
IV.ATCC.EHN. ML:1.0 0.0000439 1.2 AML other m 2021-08-26T02:01:14.38
IV.FOSV.EHE. ML:0.8 0.000025849999999999998 1.48 AML other m 2021-08-26T02:01:15.98
IV.GAVE.EHN. ML:1.2 0.00006805 0.94 AML other m 2021-08-26T02:01:15.01
IV.EL6.EHE. ML:1.3 0.00008225000000000001 0.58 AML other m 2021-08-26T02:01:15.66
IV.EL6.EHN. ML:1.4 0.00008535 0.8 AML other m 2021-08-26T02:01:16.20
IV.GUMA.HHN. ML:1.0 0.0000514 0.62 AML other m 2021-08-26T02:01:16.59
IV.GAVE.EHE. ML:1.1 0.000057400000000000006 0.16 AML other m 2021-08-26T02:01:17.35
IV.FOSV.EHN. ML:0.8 0.000026000000000000002 1.24 AML other m 2021-08-26T02:01:17.64
IV.CING.HHN. ML:1.0 0.000030399999999999997 0.78 AML other m 2021-08-26T02:01:17.66
IV.CING.HHE. ML:1.0 0.000029699999999999997 0.74 AML other m 2021-08-26T02:01:18.71
IV.MURB.HHE. ML:1.2 0.00005215 0.28 AML other m 2021-08-26T02:01:18.64
IV.SSFR.HHE. ML:1.1 0.000031849999999999995 0.16 AML other m 2021-08-26T02:01:19.64
IV.SSFR.HHN. ML:1.1 0.00003295 0.66 AML other m 2021-08-26T02:01:20.90
IV.MURB.HHN. ML:1.1 0.00004045 0.42 AML other m 2021-08-26T02:01:21.32
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