Earthquake with magnitude of ML 1.0 on date 24-08-2021 and time 00:34:40 (UTC) in region 5 km SW Amatrice (RI)

A magnitude ML 1.0 earthquake occured in region: 5 km SW Amatrice (RI), on

  • 24-08-2021 00:34:40 (UTC)
  • 24-08-2021 02:34:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.59, 13.267 at 14 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
Amatrice RI 5 2657 2657
Montereale AQ 7 2581 5238
Capitignano AQ 8 665 5903
Cittareale RI 9 482 6385
Campotosto AQ 9 542 6927
Accumoli RI 12 667 7594
Borbona RI 14 617 8211
Cagnano Amiterno AQ 15 1369 9580
Barete AQ 15 737 10317
Posta RI 16 694 11011
Pizzoli AQ 17 4326 15337
Crognaleto TE 18 1297 16634

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NW of L'Aquila (69753 inhabitants)
37 Km W of Teramo (54892 inhabitants)
51 Km E of Terni (111501 inhabitants)
61 Km SE of Foligno (57155 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
79 Km W of Chieti (51815 inhabitants)
79 Km W of Pescara (121014 inhabitants)
79 Km NE of Guidonia Montecelio (88673 inhabitants)
79 Km NE of Tivoli (56533 inhabitants)
92 Km SE of Perugia (166134 inhabitants)
97 Km E of Viterbo (67173 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 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 1.0 2021-08-24
00:34:40
42.5897 13.2667 14 2021-08-24
00:52:56
Sala Sismica INGV-Roma 94558711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-24 00:34:40 ± 0.13
Latitude 42.5897 ± 0.0054
Longitude 13.2667 ± 0.0061
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94558711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 572
Semi-minor axis of confidence ellipse (meter) 366
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 333
Circular confidence region, given by single value of horizontal uncertainty (meter) 570
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 24
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
Epicentral distance of station farthest from the epicenter (degree) 0.42268
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 94558711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-24 00:52:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ATPI.EHZ. 2021-08-24T00:34:58.99 3.0 negative manual P -0.08 0
IV.MF5.EHZ. 2021-08-24T00:34:56.83 0.1 undecidable manual S 20 0.4227 95 0.92 69
IV.MC2.EHE. 2021-08-24T00:34:53.42 0.3 undecidable manual S 350 0.3265 97 0.34 66
IV.MMO1.EHZ. 2021-08-24T00:34:52.34 0.6 undecidable manual S 8 0.313 97 -0.33 46
IV.GIGS.HHZ. 2021-08-24T00:34:51.14 0.1 undecidable manual S 121 0.2635 99 -0.1 93
IV.GAVE.EHZ. 2021-08-24T00:34:51.89 0.3 undecidable manual S 291 0.2923 98 -0.19 70
IV.TERO.HHZ. 2021-08-24T00:34:50.11 0.6 undecidable manual S 82 0.25 100 -0.74 39
IV.NRCA.HHZ. 2021-08-24T00:34:50.82 0.1 undecidable manual S 335 0.268 99 -0.55 88
IV.MF5.EHZ. 2021-08-24T00:34:49.77 0.1 undecidable manual P 20 0.4227 95 0.2 90
IV.LNSS.HHZ. 2021-08-24T00:34:48.44 0.1 undecidable manual S 275 0.1673 111 -0.02 98
IV.MTRA.HNZ. 2021-08-24T00:34:48.51 0.3 undecidable manual S 30 0.1925 106 -0.66 64
IV.GAVE.EHZ. 2021-08-24T00:34:47.29 0.6 positive manual P 291 0.2923 98 -0.07 48
IV.MMO1.EHZ. 2021-08-24T00:34:47.51 0.1 undecidable manual P 8 0.313 97 -0.19 93
IV.MC2.EHE. 2021-08-24T00:34:47.76 0.1 undecidable manual P 350 0.3265 97 -0.18 93
IV.NRCA.HHZ. 2021-08-24T00:34:46.71 1.0 negative manual P 335 0.268 99 -0.24 23
IV.RM33.EHZ. 2021-08-24T00:34:46.58 0.3 undecidable manual S 205 0.089 135 0.06 75
IV.MTRA.HNZ. 2021-08-24T00:34:46.07 0.3 undecidable manual P 30 0.1925 106 0.39 68
IV.TERO.HHZ. 2021-08-24T00:34:46.69 1.0 undecidable manual P 82 0.25 100 0.04 24
IV.SMA1.EHZ. 2021-08-24T00:34:46.02 0.1 undecidable manual S 51 0.0648 146 -0.03 100
IV.GIGS.HHZ. 2021-08-24T00:34:46.94 0.1 undecidable manual P 121 0.2635 99 0.07 97
IV.T1299.HNZ. 2021-08-24T00:34:45.57 0.6 undecidable manual S 14 0.0459 155 -0.2 49
IV.LNSS.HHZ. 2021-08-24T00:34:45.35 0.1 undecidable manual P 275 0.1673 111 0.08 98
IV.SMA1.EHZ. 2021-08-24T00:34:44.04 0.1 undecidable manual P 51 0.0648 146 0.16 98
IV.RM33.EHZ. 2021-08-24T00:34:44.48 0.1 undecidable manual P 205 0.089 135 0.33 95
IV.T1299.HNZ. 2021-08-24T00:34:43.79 0.1 undecidable manual P 14 0.0459 155 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.9 9.345E-5 0.2 AML other m 2021-08-24T00:34:46.30
IV.SMA1.EHN. ML:0.7 5.635E-5 0.44 AML other m 2021-08-24T00:34:46.24
IV.RM33.EHN. ML:0.9 8.86E-5 0.14 AML other m 2021-08-24T00:34:46.88
IV.RM33.EHE. ML:0.9 8.94E-5 0.3 AML other m 2021-08-24T00:34:46.97
IV.NRCA.HHE. ML:1.2 6.35E-5 1.88 AML other m 2021-08-24T00:34:51.95
IV.NRCA.HHN. ML:0.9 3.6686925E-5 0.14 AML other m 2021-08-24T00:34:50.89
IV.RM33.HNE. ML:1.1 0.0001283299 0.34 AML other m 2021-08-24T00:34:47.78
IV.NRCA.HNE. ML:1.4 0.00011608561 0.47 AML other m 2021-08-24T00:34:52.29
IV.GAVE.EHE. ML:1 3.8186545E-5 0.16 AML other m 2021-08-24T00:34:52.25
IV.GAVE.EHN. ML:0.8 2.42146E-5 0.12 AML other m 2021-08-24T00:34:52.64
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