Earthquake with magnitude of ML 1.2 on date 25-10-2020 and time 06:09:31 (Italy) in region 7 km SE Cascia (PG)

A magnitude ML 1.2 earthquake occured in region: 7 km SE Cascia (PG), on

  • 25-10-2020 05:09:31 (UTC)
  • 25-10-2020 06:09:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.68, 13.08 at 11 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
Cascia PG 7 3217 3217
Cittareale RI 10 482 3699
Monteleone di Spoleto PG 11 599 4298
Norcia PG 13 4957 9255
Poggiodomo PG 13 117 9372
Accumoli RI 14 667 10039
Leonessa RI 16 2435 12474
Posta RI 18 694 13168
Amatrice RI 18 2657 15825
Borbona RI 19 617 16442

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Terni (111501 inhabitants)
44 Km SE of Foligno (57155 inhabitants)
45 Km NW of L'Aquila (69753 inhabitants)
51 Km W of Teramo (54892 inhabitants)
74 Km SE of Perugia (166134 inhabitants)
81 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km N of Tivoli (56533 inhabitants)
85 Km E of Viterbo (67173 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
96 Km W of Pescara (121014 inhabitants)
96 Km W of Chieti (51815 inhabitants)
100 Km NE of Roma (2864731 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.2 2020-10-25
05:09:31
42.68 13.08 11 2020-10-25
05:30:51
Sala Sismica INGV-Roma 84108281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-25 05:09:31 ± 0.05
Latitude 42.68 ± 0.00
Longitude 13.08 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84108281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 479
Semi-minor axis of confidence ellipse (meter) 411
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 116
Circular confidence region, given by single value of horizontal uncertainty (meter) 480
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.08454
Epicentral distance of station farthest from the epicenter (degree) 0.38761
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 84108281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-25 05:30:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2020-10-25T05:09:39.08 0.1 undecidable manual P 1 0.3552 90 -0.16 93
IV.TERO.HHZ. 2020-10-25T05:09:39.66 1.0 undecidable manual P 98 0.3876 90 -0.14 23
IV.NRCA.HHZ. 2020-10-25T05:09:38.64 0.3 undecidable manual S 9 0.1538 91 -0.13 73
IV.MMO1.EHZ. 2020-10-25T05:09:38.12 0.6 negative manual P 39 0.2824 90 0.12 48
IV.GAVE.EHZ. 2020-10-25T05:09:38.30 0.3 undecidable manual S 275 0.1385 93 -0.02 75
IV.ARRO.EHZ. 2020-10-25T05:09:37.52 0.6 positive manual P 246 0.2545 90 0 49
IV.SMA1.EHZ. 2020-10-25T05:09:36.66 0.6 positive manual P 105 0.1925 91 0.2 48
IV.LNSS.HHZ. 2020-10-25T05:09:36.60 0.3 undecidable manual S 202 0.0845 124 -0.19 74
IV.RM33.EHZ. 2020-10-25T05:09:36.42 0.6 undecidable manual P 151 0.1979 91 -0.13 49
IV.GAVE.EHZ. 2020-10-25T05:09:35.67 0.1 positive manual P 275 0.1385 93 0.13 98
IV.NRCA.HHZ. 2020-10-25T05:09:35.91 0.1 positive manual P 9 0.1538 91 0.11 99
IV.LNSS.HHZ. 2020-10-25T05:09:34.75 0.1 negative manual P 202 0.0845 124 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.6 0.0005265 0.14 AML other m 2020-10-25T05:09:36.84
IV.LNSS.HNE. ML:1.6 0.000475 0.14 AML other m 2020-10-25T05:09:36.84
IV.LNSS.HHN. ML:1.6 0.0005135 0.14 AML other m 2020-10-25T05:09:36.89
IV.LNSS.HNN. ML:1.6 0.000499 0.14 AML other m 2020-10-25T05:09:36.89
IV.NRCA.HHE. ML:1 7.425E-5 0.18 AML other m 2020-10-25T05:09:39.16
IV.NRCA.HHN. ML:0.7 4.355E-5 0.54 AML other m 2020-10-25T05:09:39.63
IV.RM33.EHN. ML:1.2 0.00010445 0.24 AML other m 2020-10-25T05:09:39.74
IV.RM33.EHE. ML:1 6.085E-5 1.4 AML other m 2020-10-25T05:09:40.75
IV.SMA1.EHE. ML:1.4 0.0001855 0.26 AML other m 2020-10-25T05:09:40.52
IV.SMA1.EHN. ML:1.2 0.00010715 0.26 AML other m 2020-10-25T05:09:40.50
IV.TERO.HHE. ML:0.8 2.01E-5 0.56 AML other m 2020-10-25T05:09:45.87
IV.TERO.HHN. ML:1.1 3.78E-5 1.26 AML other m 2020-10-25T05:09:47.87
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download