Earthquake with magnitude of ML 0.8 on date 25-10-2021 and time 06:27:01 (Italy) in region 4 km SW Monte Cavallo (MC)

A magnitude ML 0.8 earthquake occured in region: 4 km SW Monte Cavallo (MC), on

  • 25-10-2021 04:27:01 (UTC)
  • 25-10-2021 06:27:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.965, 12.968 at 10 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.

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 4 145 145
Sellano PG 9 1079 1224
Visso MC 11 1107 2331
Preci PG 11 724 3055
Pieve Torina MC 11 1458 4513
Serravalle di Chienti MC 12 1070 5583
Fiordimonte MC 13 202 5785
Ussita MC 14 444 6229
Pievebovigliana MC 15 866 7095
Muccia MC 15 915 8010
Cerreto di Spoleto PG 17 1075 9085
Castelsantangelo sul Nera MC 17 281 9366
Fiastra MC 17 559 9925
Acquacanina MC 18 121 10046

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km E of Foligno (57155 inhabitants)
50 Km E of Perugia (166134 inhabitants)
52 Km NE of Terni (111501 inhabitants)
69 Km W of Teramo (54892 inhabitants)
77 Km NW of L'Aquila (69753 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
93 Km NE of Viterbo (67173 inhabitants)
98 Km S of Fano (60888 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.8 2021-10-25
04:27:01
42.9648 12.9677 11 2021-10-25
04:32:22
Sala Sismica INGV-Roma 96970901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-25 04:27:01 ± 0.09
Latitude 42.9648 ± 0.0036
Longitude 12.9677 ± 0.0061
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96970901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 495
Semi-minor axis of confidence ellipse (meter) 316
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 490
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 170
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.21494
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 96970901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-25 04:32:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IX.SCL3.EHZ.02 2021-10-25T04:28:38.97 3.0 undecidable manual Sg 6.21 0
RF.GEPF.HHZ. 2021-10-25T04:28:36.91 3.0 undecidable manual Sg 5.34 0
IV.MESG.HHZ. 2021-10-25T04:28:23.81 3.0 undecidable manual Pg 12.23 0
IV.ICAI.EHZ. 2021-10-25T04:28:17.02 3.0 undecidable manual Sg 0.35 0
IV.MTGR.HHZ. 2021-10-25T04:28:13.28 3.0 undecidable manual Pn -5.96 0
IV.GRIS.EHZ. 2021-10-25T04:28:03.84 3.0 undecidable manual Pn -0.89 0
IV.PAOL.HHZ. 2021-10-25T04:27:44.07 3.0 undecidable manual Pg 1.57 0
IT.PLTA.HNZ. 2021-10-25T04:27:34.17 3.0 undecidable manual Pg -1.26 0
IV.RIBO.EHZ.01 2021-10-25T04:27:29.12 3.0 undecidable manual S -9.99 0
IV.SRES.HHZ. 2021-10-25T04:27:26.01 3.0 undecidable manual S -6.85 0
IV.ARVD.HHZ. 2021-10-25T04:27:15.39 3.0 undecidable manual S -2.77 0
IV.CSP1.EHZ. 2021-10-25T04:27:10.81 0.3 undecidable manual S 54 0.2149 50 -0.06 73
IV.NRCA.HHZ. 2021-10-25T04:27:09.18 0.3 undecidable manual S 141 0.1691 119 -0.22 71
IV.MML1.EHZ. 2021-10-25T04:27:08.66 0.3 undecidable manual S 1 0.1484 123 -0.05 74
IV.CSP1.EHZ. 2021-10-25T04:27:07.09 0.3 negative manual P 54 0.2149 50 0 74
IV.FDMO.HHZ. 2021-10-25T04:27:07.50 0.3 undecidable manual S 51 0.1133 130 -0.1 74
IV.CESI.HHZ. 2021-10-25T04:27:06.16 0.1 undecidable manual S 311 0.0612 147 -0.1 99
IV.FEMA.HNN. 2021-10-25T04:27:06.47 0.3 undecidable manual S 93 0.0603 148 0.23 73
IV.NRCA.HHZ. 2021-10-25T04:27:06.15 0.3 undecidable manual P 141 0.1691 119 -0.09 73
IV.MML1.EHZ. 2021-10-25T04:27:05.86 0.3 undecidable manual P 1 0.1484 123 0.02 75
IT.MTCL.HGN. 2021-10-25T04:27:05.69 0.1 undecidable manual S 38 0.0369 159 -0.15 99
IV.FDMO.HHZ. 2021-10-25T04:27:05.26 0.6 positive manual P 51 0.1133 130 0.06 50
IV.CESI.HHZ. 2021-10-25T04:27:04.51 0.1 undecidable manual P 311 0.0612 147 0.08 100
IV.FEMA.HNN. 2021-10-25T04:27:04.68 0.1 undecidable manual P 93 0.0603 148 0.26 96
IT.MTCL.HGN. 2021-10-25T04:27:04.28 0.1 undecidable manual P 38 0.0369 159 0.09 100
IV.MURB.HHZ. 2021-10-25T04:26:59.19 3.0 undecidable manual P -4.7 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.9 0.000111 0.48 AML other m 2021-10-25T04:27:06.23
IV.CESI.HHN. ML:0.8 0.000106 0.08 AML other m 2021-10-25T04:27:06.24
IV.FDMO.HHE. ML:0.7 5.51E-5 0.14 AML other m 2021-10-25T04:27:07.59
IV.FDMO.HHN. ML:0.8 5.765E-5 0.92 AML other m 2021-10-25T04:27:07.68
IV.MML1.EHE. ML:0.8 5.72E-5 0.16 AML other m 2021-10-25T04:27:08.84
IV.MML1.EHN. ML:0.7 3.88E-5 0.82 AML other m 2021-10-25T04:27:08.57
IX.SCL3.EHN.02 ML:3.4 0.000245 0.26 AML other m 2021-10-25T04:28:39.86
RF.GEPF.HHN. ML:2.8 4.56E-5 0.06 AML other m 2021-10-25T04:28:48.77
RF.GEPF.HHE. ML:2.8 4.645E-5 0.08 AML other m 2021-10-25T04:28:48.86
IX.SCL3.EHE.02 ML:3.1 0.0001375 0.08 AML other m 2021-10-25T04:28:53.65
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