Earthquake with magnitude of ML 1.1 on date 25-08-2021 and time 03:40:49 (UTC) in region 2 km NW Rocca di Cambio (AQ)

A magnitude ML 1.1 earthquake occured in region: 2 km NW Rocca di Cambio (AQ), on

  • 25-08-2021 03:40:49 (UTC)
  • 25-08-2021 05:40:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.252, 13.475 at 6 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
Rocca di Cambio AQ 2 533 533
Ocre AQ 4 1167 1700
Fossa AQ 5 721 2421
Villa Sant'Angelo AQ 6 424 2845
Sant'Eusanio Forconese AQ 6 394 3239
Rocca di Mezzo AQ 6 1526 4765
San Demetrio ne' Vestini AQ 8 1854 6619
Fagnano Alto AQ 8 418 7037
Poggio Picenze AQ 10 1136 8173
Fontecchio AQ 11 369 8542
Prata d'Ansidonia AQ 11 496 9038
Lucoli AQ 12 1011 10049
L'Aquila AQ 13 69753 79802
Barisciano AQ 13 1828 81630
Ovindoli AQ 14 1227 82857
Tione degli Abruzzi AQ 14 310 83167
Tornimparte AQ 15 3187 86354
San Pio delle Camere AQ 15 661 87015
Caporciano AQ 16 230 87245
Massa d'Albe AQ 17 1476 88721
Santo Stefano di Sessanio AQ 17 111 88832
Carapelle Calvisio AQ 18 87 88919
Castelvecchio Calvisio AQ 19 153 89072
Celano AQ 20 11017 100089
Magliano de' Marsi AQ 20 3690 103779
Calascio AQ 20 137 103916

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km SE of L'Aquila (69753 inhabitants)
49 Km SW of Teramo (54892 inhabitants)
58 Km W of Chieti (51815 inhabitants)
63 Km W of Montesilvano (53738 inhabitants)
64 Km NE of Tivoli (56533 inhabitants)
65 Km W of Pescara (121014 inhabitants)
68 Km E of Guidonia Montecelio (88673 inhabitants)
76 Km E of Terni (111501 inhabitants)
85 Km NE of Velletri (53303 inhabitants)
91 Km E of Roma (2864731 inhabitants)
99 Km NE of Latina (125985 inhabitants)
100 Km NE of Aprilia (73446 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 1.1 2021-08-25
03:40:49
42.2522 13.4747 6 2021-08-25
03:49:00
Sala Sismica INGV-Roma 94607101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-25 03:40:49 ± 0.11
Latitude 42.2522 ± 0.0054
Longitude 13.4747 ± 0.0049
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94607101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 550
Semi-minor axis of confidence ellipse (meter) 246
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 7
Circular confidence region, given by single value of horizontal uncertainty (meter) 550
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.3975
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 94607101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-25 03:49:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BAG8.EHZ. 2021-08-25T03:42:42.28 3.0 undecidable manual Sn -0.62 0
HL.VLS.HHZ. 2021-08-25T03:42:31.51 3.0 negative manual Pn 2.2 0
CR.STON.BHZ. 2021-08-25T03:42:31.36 3.0 undecidable manual Sg 11.94 0
MN.KEK.HHZ. 2021-08-25T03:42:21.72 3.0 positive manual Pg 11.36 0
IV.PII.HHZ. 2021-08-25T03:42:15.44 3.0 undecidable manual Sg 11.04 0
IV.FIR.HHZ. 2021-08-25T03:42:02.23 3.0 undecidable manual Sg 7.17 0
IX.SRN3.HHZ.02 2021-08-25T03:41:59.64 3.0 undecidable manual Sg 2.2 0
IV.CMPR.HNZ. 2021-08-25T03:41:58.38 3.0 undecidable manual Sn -0.49 0
IV.CADC.EHZ. 2021-08-25T03:41:51.42 3.0 undecidable manual Pn 0.67 0
OT.CGL1.HHZ. 2021-08-25T03:41:48.19 3.0 undecidable manual Pn 5.08 0
IV.COR1.EHZ. 2021-08-25T03:41:37.21 3.0 undecidable manual S 1.34 0
IV.ARVD.HHZ. 2021-08-25T03:41:33.39 3.0 undecidable manual S 0.42 0
IV.APEC.HHZ. 2021-08-25T03:41:15.44 3.0 undecidable manual P -1.11 0
IV.MC2.EHZ. 2021-08-25T03:41:13.45 3.0 undecidable manual S -1.45 0
IV.VAGA.HHZ. 2021-08-25T03:41:08.03 3.0 undecidable manual P -1.31 0
IV.SMA1.EHZ. 2021-08-25T03:41:05.92 0.1 undecidable manual S 345 0.3921 97 0.77 61
IV.RM33.EHZ. 2021-08-25T03:41:02.18 0.1 undecidable manual S 323 0.3202 99 -0.26 89
IV.VCEL.EHZ. 2021-08-25T03:41:01.89 0.1 undecidable manual S 62 0.3058 99 0.02 94
IV.FIAM.HHZ. 2021-08-25T03:41:00.49 0.1 undecidable manual S 274 0.2644 101 0.17 96
IV.PTQR.HHZ. 2021-08-25T03:40:59.31 0.1 undecidable manual S 193 0.2365 102 0.05 96
IV.VVLD.HHZ. 2021-08-25T03:40:58.59 0.6 undecidable manual P 164 0.3975 97 -0.27 45
IV.T0110.HHZ. 2021-08-25T03:40:58.60 0.1 undecidable manual S 96 0.2248 103 -0.2 96
IV.SMA1.EHZ. 2021-08-25T03:40:57.89 1.0 negative manual P 345 0.3921 97 -0.83 21
IV.VCEL.EHZ. 2021-08-25T03:40:56.69 0.6 positive manual P 62 0.3058 99 -0.14 48
IV.RM33.EHZ. 2021-08-25T03:40:56.54 0.6 negative manual P 323 0.3202 99 -0.62 41
IV.PTQR.HHZ. 2021-08-25T03:40:55.41 1.0 undecidable manual P 193 0.2365 102 0.09 24
IV.FIAM.HHZ. 2021-08-25T03:40:55.76 1.0 positive manual P 274 0.2644 101 -0.18 23
IV.T0110.HHZ. 2021-08-25T03:40:54.86 0.6 negative manual P 96 0.2248 103 -0.19 48
IV.FAGN.HHZ. 2021-08-25T03:40:53.84 0.1 undecidable manual S 80 0.0818 121 0.2 100
IV.FAGN.HHZ. 2021-08-25T03:40:52.15 0.1 positive manual P 80 0.0818 121 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FAGN.HHE. ML:2 0.00161 1.72 AML other m 2021-08-25T03:40:54.96
IV.FAGN.HHN. ML:1.8 0.001275 0.38 AML other m 2021-08-25T03:40:56.18
IV.T0110.HHN. ML:1.5 0.000211 0.18 AML other m 2021-08-25T03:40:59.35
IV.T0110.HHE. ML:1.6 0.0002435 0.18 AML other m 2021-08-25T03:40:59.27
IV.PTQR.HHN. ML:0.8 4.01E-5 1.54 AML other m 2021-08-25T03:41:00.22
IV.PTQR.HHE. ML:0.8 3.99E-5 0.94 AML other m 2021-08-25T03:41:00.87
IV.FIAM.HHN. ML:0.9 3.895E-5 0.26 AML other m 2021-08-25T03:41:02.03
IV.FIAM.HHE. ML:0.9 4.275E-5 0.92 AML other m 2021-08-25T03:41:02.97
IV.RM33.EHN. ML:1.2 6.535E-5 0.58 AML other m 2021-08-25T03:41:03.32
IV.RM33.EHE. ML:1.4 9.61E-5 0.42 AML other m 2021-08-25T03:41:05.11
IV.BAG8.EHE. ML:3.5 0.0001325 0.06 AML other m 2021-08-25T03:42:18.37
IV.BAG8.EHN. ML:3.4 0.0001004 1.14 AML other m 2021-08-25T03:42:18.39
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